Hind angle see anal angle

A.S. hindan gut The posterior ectodermal portion of the alimentary tract (canal) between the mid-gut hind head (ARTHRO Insecta) In Mallophaga, behind the mandibles and antennae. hindunguis n. A.S. hindan L. unguis, claw (ARTHRO Insecta) In mosquitoes, the posterior unguis of one of the hindlegs. hinge n. ME. heng, hinge 1. The point of articulation of a moveable joint. 2. (ARTHRO Insecta) The maxilla, cardo in mosquitoes, between the upper and lower vaginal lips. 3. (MOLL Bivalvia)...

Pupal respiratory horn see respiratory horn

Pupa nuda (ARTHRO Insecta) An insect pupa free from attachment. pupa obtect (ARTHRO Insecta) An adecticous pupa in which the appendages are more or less strongly cemented to the body, assumed by tanning of protein in the molting fluid pupa obtecta. pupariation n. L. pupa, puppet (ARTHRO Insecta) In certain families of Diptera, formation of a puparium by a third stage, nonfeeding larva a post-feeding larva. puparium n. L. pupa, puppet (ARTHRO Insecta) 1. In certain families of Diptera, a case...

Clearzone eye see superposition eye

A.S. cleophian, split The process by which the division of the egg cell gives rise to all the cells of the organism. cleavage cells The cells formed during cleavage a blas-tomere. cleavage nucleus 1. The nucleus of a fertilized egg cell or zygote. 2. The nucleus of egg cells that develop parthenoge-netically. cleft a. A.S. cleofian, split Split or forked. cleidoic a. Gr. kleis, bar oion, egg Pertaining to an egg enclosed within a shell or membrane that is permeable only to gasses....

Oolemma see vitelline membrane

Gr. oion, egg phagein, to eat 1. The eating of eggs egg cannibalism. 2. (ARTHRO Insecta) In social insects, eating its own or nestmate's eggs. oophore n. Gr. oion, egg phoreus, carrier (ANN Oli-gochaeta) The egg case or capsule. ooplasm n. Gr. oion, egg plasma, formed or molded The cytoplasm of an egg. oopod n. Gr. oion, egg pous, foot (ARTHRO Insecta) A component part of a sting or ovipositor. oosperm n. Gr. oion, egg sperma, seed A fertilized ovum a zygote an ooblastema. oosphere...

Dithra see Bivalvia

Gr. dis, twice trochis, runner (ARTHRO Insecta) Pertaining to Hymenoptera having a two-segmented trochanter. diuresis a. Gr. dia, through ouron, urine Pertaining to urine excretion in excess of the usual amount, directly referable to drinking, eating or certain metabolites. diurnal a. L. diurnus, of the day Pertaining to animals active only during the daytime. see nocturnal, crepuscular. diurnal eyes (ARTHRO Chelicerata) In spiders, eyes that are dark in color. diurnal rhythm...

Supratympanal organ see subgenual organ

L. supra, above anus Above the anus supraanal. suranal plate (ARTHRO Insecta) A heavily sclerotized area on the dorsum of the last abdominal segment a plate or lobe dorsad of the anus epiproct anal plate. see ectoproct. surface ornamentation (MOLL Bivalvia) A regular relief pattern on the surface of many shells. surface pheromone A pheromone active only on or very close to the body contact or near contact must be made. surface tension Surface film on liquids caused by cohesion of the...

Kation see cation

Keber's valve (MOLL Bivalvia) Pericardinal gland, connecting the pedal and visceral hemocoels. keel n. A.S. ceol, ship 1. A prominent ridge or carina. 2. (bryo) a. In Stenolaemata, a flat median portion of the zo-oidal wall between sinuses in recumbent part of endozone or as a synonym of carina. b. In Phylactolaemata, a median longitudinal ridge along recumbent tubular colony parts. 3. (MOLL Gastropoda) A spiral ridge usually marking a change of slope in the outline of the shell. Keferstein...

Temporal organs see organs of Tomosvary

Temporary haplometrosis (ARTHRO Insecta) In early colony development of social insects, a single female (queen) initiates development and is either joined by its offspring or females from other colonies, producing a pleometrotic society. see functional haplometrosis, permanent haplometrosis. temporary parasite A parasite that comes in contact with its host to feed and then departs intermittent parasite mi-cropredator. temporary pleometrosis (ARTHRO Insecta) In social insects, a colony in which...

Holoic see meganephridia

Gr. holos, whole metabole, change Dominant superorder of insects, distributed worldwide, that includes the vast majority of insect families, genera and species with complete metamorphosis and wing pads formed by invagination in some classifications Endopterygota. holometabolous metamorphosis (ARTHRO Insecta) Metamorphosis with a larva, pupa and adult complete metamorphosis. see paurometabolous. holomyarian a. Gr. holos, whole mys, muscle (NEMATA) Describing the longitudinal...

Rhizocaul rhizocaulome see hydrocaulus

Gr. rhiza, root klados, branch (PORIF) A megas-clere desma with rootlike processes rhizoclone rhizoid n. Gr. rhiza, root eidos, like (BRYO) A rootlike structure composed of one or more kenozooids. rhizoid spines (BRACHIO) Spines that serve to attach the animal, either by entanglement or by cementing themselves to a foreign surface. rhizome n. Gr. rhiza, root (CNID Hydrozoa) The stolon the rhizomorphous a. Gr. rhiza, root morphos, form Root-like. rhizophagous a. Gr. rhiza, root...

Colletocystophore see rhopalium

Colliculum n. pl. colliculi L. dim. collis, hill A small elevation. colliculate, colliculose a. colligate v.t. L. cum, with ligare, to bind To tie or bind together. colligation n. L. cum, with ligare, to bind The combining together of isolated facts. colloblast n. Gr. kolla, glue blastos, bud (CTENO) Adhesive cells sticky cells covering much of the surface of the tentacles that are used to capture and ingest prey. collophore n. Gr. kolla, glue phoreus, bearer (ARTHRO Insecta) In Collembola, a...

Automorphic see idiomorphic

Gr. autos, self L. mutare, to change Gr. gennaein, to produce Any mutagen produced in an organism as a normal or abnormal metabolite that may induce gene and chromosome mutations. autonomic a. Gr. autos, self nomos, usage Functioning due to internal causes self-regulation spontaneous. autonomous a. see choronomic. autoparasite n. Gr. autos, self parasitos, parasite A parasite existing at the expense of another parasite. autopelagic a. Gr. autos, self pelagios, of the sea...

Ligular lobe see ligula

L. ligula, little tongue Strap shaped. ligule n. L. ligula, little tongue (ANN Polychaeta) A parapo-dial lobe covering the anus dorsally. limacel n. pl. -le F., fr. L. limax, slug (MOLL Gastropoda) The concealed vestigial shell of slugs. limaciform a. L. limax, slug forma, shape Shaped like a slug. limb n. A.S. lim, limb The leg or wing of an animal. limb n. L. limbus, an edge The border, rim or edge. limbate a. L. limbus, an edge 1. Having a margin or limb of another color. 2....

Clasp filament see dististylus

Clasping apparatus (ARTHRO Crustacea) A movable, heavily sclerotized sclerite of male ostracods, that articulates with the midportion of the peniferum in a socket near the ventral cardo and the loop of the spermatic tube probably a tactile organ. class n. L. classis, division A taxonomic group used in classification of organisms into which a phylum or division is divided, and which in turn is subdivided into orders. classical taxonomy A taxonomic method incorporating the uses of morphological,...

Pseudonymph semipupa see prepupa

Pseudo-osculum n. pl. -ula Gr. pseudos, false L. osculum, small mouth (PORIF) The exterior opening of the pseu-dogaster a pseudostoma. pseudopallium n. Gr. pseudos, false L. pallium, mantle (MOLL Gastropoda) In some parasites of Echinoderms, a ring-like fold of the anterior part of the snail growing over the visceral mass and serving as a brood chamber. pseudopenis n. Gr. pseudos, false L. penis, male copulatory organ (ANN Oligochaeta) The eversible area of the body wall or atrium tip....

Apisthognathous see opisthognathous

L. apis, honeybee Gr. toxikon, poison The main toxic constituent of bee venom. apivorous a. L. apis, honeybee vorare, devour Refers to feeding on bees. aplasia n. Gr. an, without plasma, formed or molded 1. The entire failure of organs or tissue to develop. 2. Incomplete or faulty development. aplastic a. see agenesis. apneumone n. Gr. an, without pneuma, air A substance emitted by a nonliving material that envokes a behavioral or physiological reaction favorable to the receiving...

Distacalypteron see antisquama

L. distare, to stand apart Away from the body, or from point of attachment toward the end farthest from the body. distadentes n.pl. L. distare, to stand apart dentis, tooth The dentes distad on the mandible. distal a. L. distare, to stand apart Pertaining to any part of a structure farthest from midline of the body or base of attachment opposed to proximal. distal bud (BRYO Gymnolaemata) The bud arising from the distal side of the vertical wall of the parent zooid. see basal bud....

Nassanoffs gland see Nassanovs gland

Nassanov's gland (ARTHRO Insecta) In Apis, a gland opening to the exterior beneath abdominal tergites six and seven, that function in pheromone production well developed in workers, but absent in drones and maybe queens. nasus n. L. nasus, nose (ARTHRO Insecta) 1. The clypeal region the drawn-out foreward part of the face. 2. In Isop-tera, the snout-like frontal projection that functions to eject poisonous or sticky fluids at intruders. nasute n. L. nasus, nose (ARTHRO Insecta) A type of...

Cell membrane see plasma membrane

Cell organ A differentiated part of a cell that has a special function, such as a centrosome, organoid, or organelle. cells of Semper (ARTHRO Insecta) The cells of the crystalline eye cone, whose intercellular membranes form a cruciform pattern when the cone is seen in transverse section. cell theory All organisms are composed of cell(s) a cell is the smallest unit of matter that is alive (functional unit) proposed by Schwann for animals in 1838-40 cells are the reproductive units of all...

Uterine vagina see vagina uterina

L. uterus, womb An enlargement of the lower end of the oviduct, in which eggs are retained temporarily or in which the embryo develops. uterine a. utricle n. L. dim. uter, bag A small bag or bladder. utriculus n. L. dim. uter, bag (ARTHRO Insecta) In Lepidop-tera, the larger lobe of the spermatheca may be fused into one organ. see lagena. uvette n. L. dim. uva, grape (nemata Adenophorea) The glandular region where the efferent tubes of the Demanian vessels meet before passing on to...

Ecdysial glands see prothoracic glands

Ecdysial membrane (ARTHRO Insecta) A thin membrane formed from the lateral lamellae of the old procuticle that is tanned by the polyphenols and phenoloxidase associated with the new outer epicuticle during molting. ecdysial tube (ARTHRO Insecta) In some Diptera and Coleop- tera, a simple cuticular tube formed around the old spiracle and through which the old spiracle and trachea are pulled during molting. ecdysis n., pl. -ses Gr. ekdysis, getting out of Molting, the process of shedding cuticle...

Sempers cells see cells of Semper

Semper's larva (CNID Anthozoa) In Zoantharia, pelagic larva with long cilia. Semper's rib (ARTHRO Insecta) In Lepidoptera, a degenerate trachea present in the wing, alongside a functioning trachea within the vein cavity. senescence n. L. senescere, to grow old The gradual deterioration of function in an organism leading to an increased probability of death the ageing process. senility n. L. senex, old Old age. senior homonym The earliest published of two or more identical names for the same or...

Styloconic sensilla see sensillum styloconicum

Gr. stylos, pillar eidos, like (ANN Polychaeta) A small, longer than wide, projection on the parapodium. styloid a. Gr. stylos, pillar eidos, like Long and slender be-lonoid aciform. stylopization n. Gr. stylos, pillar ops, eye (ARTHRO Insecta) The endoparasitism by the coleopterous female Strepsip-tera (Stylops), of other insects stylopized. stylose a. Gr. stylos, pillar Bearing a style or several styli. stylostome n. Gr. stylos, pillar stoma, mouth (ARTHRO Chelicerata) In acarid...

Antennal scale see scaphocerite

Antennal sclerite (ARTHRO Insecta) The sclerotic rim of the basal antennal socket. see annulus antennalis. antennal segment (ARTHRO) That segment of an arthropod head from which the antennae arise, usually second segment deuterocerebral segment. antennal spine (ARTHRO Crustacea) A decapod spine situated on the anterior margin of the carapace, slightly below the antennal support (ARTHRO Insecta) In Coleoptera, ring-shaped cranial projections of scarab larvae, to which the antennae are appended...

Seleniform cell see plasmatocytes

Gr. selene, moon zone, girdle (MOLL Gastropoda) In dibranchiates, a spiral band of crescentric growth lines or threads (lunulae) on the shell surface due to the semicircular end of a notch or slit on the outer lip a slit band corresponds to the anal fasciole of some other groups. self-cleansing (MOLL Bivalvia) Removal and ejection of pseudofeces. self-fertilization The union of gametes derived from the same individual autogamy automixis. see cross-fertilization. self-sedimentation...

Pangamy see panmixia

Gr. pan, all genesis, origin Darwin's pre-genetic hypothesis that somatic cells contain particles influenced by the environment that can move to the sex cells and influence heredity. panmixia, panmixy n. Gr. pan, all mixis, a mixing Random interbreeding in a population nonselective breeding. pan-mictic a. panoistic ovariole Ovarioles that have no specialized nurse cells and are of a primitive type germ cells occurring without interruption from one end to the other panoistic egg...

Spermalege see ectospermalege mesospermalege Ribagas organ

Gr. sperma, seed The male gonad, in which the sperm cells are produced. spermatangium n. Gr. sperma, seed angon, jar (MOLL Cephalopoda) Evaginated spermatophores ready to release sperm sperm sacs sperm bladders sperm bulbs. spermateleosis n. Gr. sperma, seed teleiosis, completion Spermiogenesis. spermatheca n. pl. -ae Gr. sperma, seed theke, case A saccate genital structure in female invertebrates in which sperm from the male is received and may or may not be stored...

Onychii see pulvilli

Onychium n. pl. -ia Gr. onyx, claw (ARTHRO Insecta) A general term for a pad between the tarsal claws. Onychophora, onychophorans n. n.pl. Gr. onyx, claw phorein, to carry A phylum of terrestrial animals comprised of a single class or order of the same name, frequently referred to as Peripatus once considered to be the missing link between annelids and arthropods, but now considered to be the sister group of the arthropod complex of Crustacea, Tracheata, and Chelicerata. ooblast n. Gr. oion,...

Chlorogogue see chloragogen cells

Gr. chloros, yellow-green phyllon, leaf The green pigment of plants and certain protozoa and bacteria, involved in photosynthesis. choana n. pl. -ae Gr. choane, funnel Funnel-shaped. choanocyte n. Gr. choane, funnel kytos, container (PORIF) A flagellate cell crowned by a collar of cytoplasmic tentacles that generates currents of water a collar cell. choanocyte chamber (PORIF) A cavity enclosed by a group of choanocytes. choanoderm n. Gr. choane, funnel derma, skin (PORIF) Any...

Homothermis see homoiothermal

Homotrichous anisorhiza (CNID) A nematocyst open at the tip with a slightly swollen base, and with spines of equal length along the thread. homotype n. Gr. homos, same typos, type A structure corresponding to a structure on the opposite side of the body reverse symmetry homeotype. see enantiomorphic. homotypic a. Gr. homos, same typos, type 1. Pertaining to the second meiotic division (meiosis). 2. Exhibiting homo-typy. homotypy n. Gr. homos, same typos, type The similarity or equality of body...

Inductor see organizer

L. inductura, a coating (MOLL Gastropoda) Smooth shelly layer of the shell secreted by the mantle, extending from the inner side of the aperture over the parietal region, columellar lip, and part or all of the shell exterior. indumentum n. L. indumentum, garment Covered by hairs, scales or tufts. indurate a. L. induratare, to make hard Hardened. indusium n. pl. -sia L. indusium, tunic (ARTHRO Insecta) 1. A larva casing. 2. The third covering of embryonic membrane formed from a...

Scent pore see ostiole

Scent scales (ARTHRO Insecta) Scales distinguished from clothing scales by their extreme length, sometimes called hairs. see androconia. sceptrules n. Gr. dim. skeptron, royal staff (PORIF Sclero-spongiae) Microscleric monactinal triaxonic spicules that include clavules with terminal umbels or smooth heads. schemochrome n. Gr. schema, shape chroma, color (ARTHRO Insecta) Colors produced by physical or structural surfaces, devoid of pigment, as the iridescent colors of a schistosomula n. pl....

Athericerous see aristate

Gr. a, without thermos, hot biosis, manner of life 1. Dormancy induced by low temperatures in relation to an organism. 2. The process of waste elimination during a resting stage at low temperature. athrocyte n. Gr. athroos, collected kytos, container A sessile type of coelomocyte, phagocytic in function. athrocytosis n. Gr. athroos, collected kytos, container The ability of cells to absorb and retain particles in suspension. atmosphere n. Gr. atmos, vapor sphaira, ball 1. The...

Verrills organ see funnel organ

Verruca n. pl. verrucae L. verruca, wart 1. A wart or wartlike prominence. 2. (ARTHRO Chelicerata) In certain Acari, a genital papilla, sternal prominence, or the genital capsule. 3. (ARTHRO Insecta) In Lepidoptera larvae, a tubercle bearing tufts of setae. 4. (CNID Anthozoa) a. In Alcyonaria, a protuberance surrounding the base of polyps. b. In Ac-tiniaria, wart-like prominences on the body wall. verruciform cells (MESO) Somatic cells enlarged by lipoprotein bodies. verrucose a. L. verruca,...

Plasmalemma see plasma membrane

Plasma membrane A unit membrane surrounding the cell's protoplasm cell membrane plasmalemma. plasmatocytes n.pl. Gr. plasma, formed or molded kytos, container Small to large polymorphic hemocytes with a round to elongate nucleus and with either homogeneous or finely granular or finely vacuolated cytoplasm. plasmid n. Gr. plasma, formed or molded eidos, like DNA molecules that are not attached to a chromosome but are inherited regularly. plasmon n. Gr. plasma, formed or molded All...

Calyoptis larva see calyptopis stage

Gr. kalypto, cover (ARTHRO Insecta) In Diptera, small membranous lobes or disk-like structures at the base of the wing, just above the halter. see alula squama. calyptoblastic a. Gr. kalyptos, covered blastos, bud (CNID Hydrozoa) Pertains to hydranths in which the gonophores are commonly borne singly or multiply on stalked blas-tostyles that are encased in peridermal gonothecae. calyptobranchiate a. Gr. kalyptos, covered branchia, gills Bearing gills imperceptible from the...

Cryptodicyclic see pseudomonocyclic

Cryptodont shell (MOLL Bivalvia) In some groups of early origin, refers to lack of hinge teeth. see ctenodont shell. cryptogastra a. Gr. kryptos, hidden gaster, stomach Having the venter or belly covered or concealed. see gymnogas-tra. cryptogene a. Gr. kryptos, hidden genos, beginning Of unknown descent. cryptogram n. Gr. kryptos, hidden gramma, written character Method that expresses in a standard code form a collection of data used in classification. cryptogyne n. Gr. kryptos, hidden gyne,...

Coeloblast see hypoblast

Coeloblastula n. pl. -lae Gr. koilos, hollow blastos, bud 1. A hollow blastula a blastula without qualification. 2. (PO-RIF Calcarea) The simple type of blastula larva found in Calcinia . coeloconoid a. Gr. koilos, hollow konos, cone eidos, form Approaching conical but with concave sides extraconic. see conoid, cyrtoconoid. coelogastrula n. Gr. koilos, hollow gaster, stomach A gas-trula derived from a coeloblastula. coelom n. Gr. koilos, hollow The body cavity or space between the body wall and...

Propus see propodite

Gr. pro, before rhabdion, little rod (NEMATA) The wall of the prostome. see rhabdion. prosartema n. Gr. pros, forward artema, earring (ARTHRO Crustacea) In Decapoda, a row of dense setae on the inner margin of the basal segment of the antennular peduncle also called eye brush. proscolex n. Gr. pro, before skolex, worm (PLATY Cestoda) The anterior part of a divided scolex. prosiphonate lining (PORIF Calcarea) In recent Sphinctozoa, the lining of the atrial cavity of one chamber...

Connector neurone see association neuron

Connexiva n. pl. sing. -vum L. connexus, join (ARTHRO Insecta) The lateral flanges (laterotergites or paratergites) of the abdomen, where the ventral plates are attached to the main tergal plates. see pulmonarium. connivent a. L. connivere, to close the eyes Converging or coming close together arching inward so the points meet. conoid a. Gr. konos, cone eidos, form Having the form of a cone conoidal. see cyrtoconoid, coeloconoid. conotheca n. Gr. konos, cone theke, case (MOLL Cephalopoda) The...

Diactine see diactinal monaxon

Gr. dis, twice triaina, trident (PORIF) A form of tri-aene produced by loss of one ray from the cladome. diaeresis n. Gr. diairein, to divide (ARTHRO Crustacea) A transverse groove on the posterior part of an exopod (rarely endopod) of a uropod appendage occasionally dividing the exopod into two movable parts. diagenodont teeth (MOLL Bivalvia) Having differentiated cardinal teeth (up to 3) and lateral teeth (up to 2) on the hinge plate. diagnosis n. pl. -noses Gr. diagignoskein, to...

Retrofection see autoinfection

L. retro, backwards flectere, to bend Bending in different directions bent or turned backwards. retrogressive development Developmental trend in evolution resulting in simplification of an organism, usually through the complete or partial loss of one or more structures regressive development. retrorse a. L. retrorsus, turned or bent backwards Turned, bent, or directed backward backward projecting. see an-trorse, detrorse. retrovesicular ganglion (NEMATA) The largest ganglion,...

Oral spear see stomatostyle odontostyle

Oral styles (KINOR) Spines arranged in a series around the mouth cone. oral surface (ECHINOD Asteroidea) The entire undersurface of the disc and arms. oral tentacles (moll) Tentacle-like outgrowths of the lip. oral valve (ECHINOD Crinoidea) One of 5 low triangular flaps separating the ambulacral grooves. oral vibrissae (ARTHRO Insecta) In certain Diptera, a pair of stout bristles or hairs on each side of the face, near or above the oral margin larger than those on the vibrissal ridge. orb n. L....

Monometrosis see haplometrosis

Gr. monos, one L. nomen, name Having one name or designation consisting of one term only unino-mial. see binomial. monomorphic colony (BRYO) A colony in which only one kind of zooid occurs in the zone of asexual reproduction. monomorphic polypides (BRYO Phylactolaemata) One morphologic type of organ system in an asexual budding zone. monomorphic zooids (BRYO Gymnolaemata) Zooids of one morphologic type in the zone of astrogenetic repetition. monomorphism n. Gr. monos, one morphe,...

Micronucleocytes see plasmatocytes

Gr. mikros, small organon, instrument A microscopic organism such as most nematodes, rotifers, etc. micropaleontology n. Gr. mikros, small palaios, ancient logos, discourse The study of microscopic fossils. microphagous a. Gr. mikros, small phagein, to eat Feeding on small objects. see macrophagous. microphthalmy n. Gr. mikros, small ophthalmos, eye An abnormally small antenna. microphthalmic a. microplankton n. Gr. mikros, small plankton, wandering Small organisms floating in...

Cupola organ see sensillum campaniformium

L. cupreus, of copper Copper colored, coppery. cupula n. pl. -ae L. dim. cupula, tub (MOLL Cephalopoda) The functional unit of the sensory nerves of the cristae in dibranchiates. cupulate a. L. dim. cupula, tub Cup-shaped bearing a cupule. cupule n. L. dim. cupula, tub A small sucker or acetabulum of various invertebrates. cupuliform a. L. cupula, tub forma, shape Cup-shaped cy-athiform. curculionids n.pl. L. curculio, weevil (ARTHRO Insecta) U- or C-shaped larvae with a distinct...

Zoaea see zoea

Gr. zoon, animal dim. anthos, flower (CNID Anthozoa) An elongate larval form of Zoanthinaria with a ventral band of very long cilia. see zoanthina, Semper's larva. zoanthina n. Gr. zoon, animal dim. anthos, flower (CNID Anthozoa) An oval larval form of Zoanthinaria with a girdle of long cilia near the oral pole. see zoanthella, Semper's larva. zoarium n. Gr. zoon, animal -arium, belonging to (BRYO) A colony. zoea, zooea, zoaea n. Gr. zoe, life A larval stage in the development of...

Metaepisternum see metepisternum

Gr. meta, after L. eruca, caterpillar (ARTHRO Insecta) Poisoning by larval setae on cocoons, etc. see lepidopterism. metafemale n. Gr. meta, after L. femella, little woman (ARTHRO Insecta) In Diptera, an individual with 3 X-chromo-somes and 2 sets of autosomes found in Drosophila. metagastric lobe or area (ARTHRO Crustacea) In Decapoda, the posterior division of the gastric region of the carapace sometimes ill-defined. metagenesis n. Gr. meta, after genesis, beginning Alternation...

Holonephridia see meganephridia

Gr. holos, whole para, near lektos, choose typos, type Any specimen from the original material that is later established as a paratype, it must be of the same sex described by the author. holoparasite n. Gr. holos, whole parasitos, parasite An obligate parasite. holophyletic a. Gr. holos, whole phyle, tribe Denoting a monophyletic group that contains all of the descendants of the most recent common ancestor of that group. see mo-nophyletic.

Glands of Morren see calciferous glands

Gland spines (ARTHRO Insecta) In Diaspidinae, small to large spines that are conical, bifid, or somewhat fimbriate at the tip and have one or more ducts that extend to the tip of the spine pectines plates squamae. gland tubercules (ARTHRO Insecta) In Diaspidinae, a gland spine that is short, basally swollen and sclerotized. glanduba n. pl. -ae L. dim. glans, acorn (ARTHRO Insecta) In Hymenoptera, chitinized ring openings of the cutaneous wax glands found in most sawfly larvae. glandulae...

Posterior cephalic foramen see foramen magnum

Posterior cribellum (ARTHRO Chelicerata) In Arachnida, the posterolateral spinnerets in Stenochilidae. posterior cross vein (ARTHRO Insecta) In Diptera, a wing cross vein at the apex of the discal cell. posterior flange (MOLL Bivalvia) In oysters, the flange posterior to the left valve separated from the main body of the valve by the posterior radial groove. posterior gastric pit (ARTHRO Crustacea) In Decapoda, one of two small dorsal depressions midline on the exterior of carapace identifying...

Tone see tonus

Tonic muscle (MOLL Bivalvia) White, opalescent part of the adductor muscle that reacts slowly, but can hold for long periods of time catch muscle. tonofibrillae n.pl Gr. tonos, stretching L. dim. fibra, fiber Fine connective fibrils extending from the ends of the skeletal muscles into the cuticle. tonus, tone n. Gr. tonos, stretching 1. The normal, maintained nerve impulse traffic. 2. The normal prolonged steady contracture of muscle fibers. tonic a. topochemical sense The sense of smell....

Cervical suture see cervical groove

Cervical vesicle (NEMATA) Distended cuticle anterior to the cervical groove. cerviculate a. L. cervix, neck Having a long neck or neck-like portion. cervicum n. L. cervix, neck (ARTHRO) The neck region. cervinus a. L. cervinus, deer Reddish, deer-gray. cervix n. pl. cervices L. cervix, neck 1. The neck or necklike part. 2. A constriction of the mouth of an organ. 3. (ARTHRO Chelicerata) In Acariformes, the dorsal part of the infracapitulum, between the line of attachment of the cheli-ceral...

Postpeltidium see schizopeltid

L. post, after petiolus, little leg (ARTHRO Insecta) 1. In Formicidae, the second segment of a two-segmented pedicel. 2. In Ichneumonidae, where the petiole (first body segment) abruptly broadens near the spiracles. postphragma n. L. post, after Gr. phragma, fence (ARTHRO Insecta) 1. Internal plates developed from the antecostal ridges at the front and back of the mesothorax and the back of the metathorax that provide attachment for the large longitudinal muscles moving the...

Leptiform see campodeiform larva

Gr. leptos, thin blastos, bud (BRYO) A floato-blast that quickly germinates after release from the parent colony. leptoderan a. Gr. leptos, thin deras, hide, leather (NEMATA) With caudal alae restricted to two sides of the body and not surrounding or meeting posterior to the tail tip. see pelod-eran. leptonema n. Gr. leptos, thin nema, thread A chromatin thread or chromosome at leptotene stage of prophase I in meiosis sometimes used as a synonym of leptotene stage. see leptotene....

Caudal sympathetic system see stomogastric nervous system

Caudal vesicle (ARTHRO Insecta) In braconid larvae, the hind-gut everted through the anus forming a vesicle responsible for about one third of the total gaseous exchange. caudate a. L. cauda, tail 1. Bearing a tail or tail-like appendage. 2. (MOLL) Having the columella of a univalve shell elongated at the base. caudocephalad adv. L. cauda, tail Gr. kephale, head Directed toward the head from the caudal region. caudula n. pl. -lae L. dim. cauda, tail A little tail. caul n. L. caulis, stalk...

Strata pl of stratum

L. stratum, a cover ficare, to make Act or process of being made up of layers. stratum n. pl. -ta L. stratum, a cover 1. A layer of tissue or cells that compose an organ. 2. A group of organisms inhabiting a particular geographical area. 3. A layer of vegetation, usually at the same stage of development. 4. A layer of sedimentary rock or earth. strepsilaematous a. Gr. strepsis, twisting laimos, throat Having a pharynx rotated along its length. see euthylae-matous. streptasters...

Androgynous see hermaphrodite

Gr. aner, male gyne, woman Having male organs develop before female during maturation protan-drous hermaphrodite. android n. Gr. aner, male Resembling a male. androsperm n. Gr. aner, male sperma, seed A male-producing spermatozoan containing a Y-chromosome, limited androsynhesmia n. Gr. aner, male syn, with hesmos, swarm A group of males gathered together during mating season. see synhesmia, gynosynhesmia. androtype n. Gr. aner, male typos, type The male type specimen of a species....

Oligoneuroptera Oligoneoptera see Endopterygota

Gr. oligos, few phagein, to eat Feeding on only a few species of food plants. see monophagous. oligophyletic a. Gr. oligos, few phyle, tribe Derived from a few ancestral forms. see monophyletic. oligopneustic a. Gr. oligos, few pneustikos, of breathing (ARTHRO Insecta) Having one or two functional spiracles on each side, including the amphipneustic, metapneustic and propneustic. oligopod n. Gr. oligos, few pous, foot 1. Bearing few legs. 2. Having fully developed thoracic legs....

Rostel see rostellum

L. rostellum, small beak forma, shape Shaped like a rostellum. rostellum, rostel n. L. rostellum, small beak 1. A small beak or rostrum. 2. (ARTHRO Insecta) The tubular piercing and sucking mouth parts. 3. (BRACHIO) Low projection between anterior muscle scars to which internal oblique muscles are attached. 4. (platy Cestoda) A rounded prominence on the anterior end of the scolex, often furnished with retractile spines or hooks sometimes referred to as an aclid organ. 5. (PLATY...

Gene splicing see splicing

Genetic assimilation The fixation of a genetic character being influenced by artificial environmental changes, not evident in the original phenotype. genetic balance Harmonious interaction of genes ensuring normal development of the organism genic balance. genetic code Genetic information that is encoded into DNA and transcribed to messenger RNA which forms peptides by genetic translation. genetic drift Genetic changes in isolated populations caused by random phenomena rather than by natural...

Sigmoid curve see logistic curve

Signa n.pl. sing. signum L. signum, sign (ARTHRO Insecta) In female Lepidoptera, spines or dentate or roughened patches on the inner wall of the corpus bursae, thought to function in holding or breaking up spermatophores. silicalemma n. L. silex, flint Gr. lemma, peel (PORIF) A unit membrane enclosing the axial filament of a siliceous spi-cule. siliceous, silicious a. L. silex, flint Of or pertaining to silica. silicoblasts n.pl. L. silex, flint Gr. blastos, bud (PORIF) A cell that secretes all...

Imagine see imago

L. imago, image (ARTHRO Insecta) 1. The adult or reproductive stage. 2. In termites, applied only to the adult primary reproductives. imaginai a. imagochrysalis n. L. imago, image Gr. chrysallis, chrysalis (ARTHRO Chelicerata) In the chigger mite life cycle, a quiescent stage between the nymph and adult. imbricate plates (ARTHRO Crustacea) In Cirripedia, the lower lateral, lower latus, and lower latera. imbrication n. L. imbricare, to cover with tiles An overlapping at the margins as...

Cincinnulus see retinaculum

Cinclides n.pl. sing. cinclis Gr. kinklis, latticed gate (CNID Anthozoa) In Actinaria, permanent or temporary perforations of the columnar body wall that permit the extrusion of water or acontia. cinct a. L. cinctum, girdle Belted, girdled or encircled. cinereous a. L. cinereus, ash colored Ash-gray, ashen, or having the color of wood ashes. cingulum n. L. cingulum, girdle 1. Any band or girdle-like structure. 2. (ANN) The clitellum. 3. (MOLL) The colored bands or spiral ornamentation on...

Hypoptera hypoptere see tegula

Gr. hypo, under ptygma, anything folded (NEMATA) Anterior and posterior cuticular flaps of the cloacal opening in some males. see epiptygma. hypopus n. pl. hypopi Gr. hypo, under pous, foot (AR-THRO Chelicerata) 1. In Acari, the second nymphal stage. 2. The non-feeding deutonymph of Acaridida either active, phoretic nymphs or rather inactive resistant nymphs. hy-pop(i)al a. hypopygial spine (ARTHRO Insecta) The caudal spine ending of the hypopygium of some female cynipid wasps....

Apotype see hypotype

Gr. apo, away typos, type Varying from a type. apparatus n. pl. -ratus, -ratuses L. apparatus, equipment Any group of structures or parts that unite together in a apparition n. L. appareo, manifest Something appearing. appeasement behavior That which follows after the attack of one animal on another of the same species with the loser assuming a submissive attitude. appeasement substance The secretion by a social parasite of attractive substances that reduce aggression in a host...

Hybrid vigour see heterosis

Hydatid cyst (platy Cestoda) Metacestode of Echinococcus, with many protoscolices, some budding inside secondary brood cysts. hydatid sand (PLATY Cestoda) Free protoscolices forming the sediment in a hydatid cyst. hydranth n. Gr. hydor, water anthos, flower (CNID Hydro-zoa) A nutritive zooid in a colony the hydroid polyp, bearing a mouth, digestive cavity and tentacles. hydrarch a. Gr. hydor, water arche, beginning A series of changes in time from newly formed pond or lake to land with climax...

Hyperhaploid see hyperploid

Gr. hyper, above meros, part (ANN Oli-gochaeta) Said of regenerate earthworms, which reproduce more segments than originally removed. hypermery n. see hypomeric. hypermetamorphosis n. Gr. hyper, above meta, after morphosis, forming 1. In the broad sense, refers to change of form throughout the life history. 2. (ARTHRO In-secta) A type of metamorphosis development in which different larval insect instars have markedly dissimilar body forms. see heteromorphous. hyperparasite n. Gr....

Carotinalbumen see astaxanthin insectoverdin pterine pigments

L. carpus, wrist Gr. keras, horn (ARTHRO Crustacea) The distal segment (5th) of the antennal peduncle. carpophagous a. Gr. karpos, fruit phagein, to eat Feeding on fruit. carpopod(ite) n. L. carpus, wrist Gr. pous, foot 1. (ARTHRO) The fifth segment of a generalized arthropod appendage. 2. (ARTHRO Chelicerata) The patella. 3. (ARTHRO Crustacea) The carpus. 4. (ARTHRO Insecta) The tibia. carpus n. pl. carpi L. carpus, Gr. wrist 1. The wrist. 2. (AR-THRO Crustacea) The...

Apogamy see apomixis

Gr. an, without polos, pivot pole Lacking a pole without radiating processes. apolegamic a. Gr. apolegein, to choose gamos, marriage Pertaining to sexual selection. apolysis n. Gr. apo, away lysis, loosen 1. (ARTHRO) The first process of molting, characterized by the detachment of the old cuticle from the underlying hypodermal (epidermal) cells. see ecdysis. 2. (platy Cestoda) The detachment of a gravid proglottid in tapeworms. apolytic a. see an-apolysis. apomict n. Gr. apo, away...

Entotropha see aptera

Entozoa n.pl., sing. entozoon Gr. entos, within zoon, animal The internal parasites collectively. entozoal a., ento-zoan a. & n. entozoic a. Gr. entos, within zoon, animal Living within another animal an internal parasite. see endozoic, epizoic. enucleate v. L. ex, out of nucleus, kernel 1. To remove an entire organ, etc. 2. To destroy or remove the nucleus of a cell. envelope n. OF. enveloper, wrap up (ARTHRO Insecta) A sheath surrounding the nest of a social wasp. environment n. F....

Tentorial fovea see tentorial pits

Tentorial macula (ARTHRO Insecta) The depressions or dark spots marking the points of union of the dorsal tentorial arms and the epicranal wall near the antennae. tentorial pits (ARTHRO Insecta) External depressions on the surface of the head marking points of union of the arms with the outer wall of the head usually two in the epis-tomal suture and one at the lower end of each postoccipital suture. tentorium n. pl. -oria L. tentorium, tent (ARTHRO Insecta) Two anterior and two posterior...

Urite see cirrus

Urn bodies 1. (MESO Rhombozoa) An urn-like sac on the ventral surface of infusoriform larvae of a dicyemid that contains four germinal cells. 2. (SIPUN) Vase-shaped, multi-cellular structures in the coelom. urocardiac ossicle (ARTHRO Crustacea) In a decapodan gastric mill, a T-shaped plate running backwards and downwards, sometimes bearing a U- or V-shaped median tooth. urogastric groove (ARTHRO Crustacea) A short transverse groove in the median or submedian region of a decapod carapace...

Alary muscles see aliform muscles

Alary polymorphism (ARTHRO Insecta) Two or more shapes of wings in the same species, not necessarily correlated to sex. alassostasy n. Gr. allassein, to alter stasis, standing (ARTHRO Chelicerata) An orthostasic stage in the life cycle in volving secondary changes in number and or shape of stases and number of molts. see orthostasy. alatae n. L. ala, wing (ARTHRO Insecta) Winged forms of Aphidae. alatate a. L. ala, wing Possessing lateral wing-like expansions. alate a. L. ala, wing 1. Winged,...

Cystocercous cercariae see cystophorous cercariae

Gr. kystis, bladder kytos, container (AR-THRO Insecta) 1. A type of specialized granular hemocyte that has a small, sharply defined nucleus and a pale, hyaline cytoplasm containing black granules coagulocytes. see granulocyte. 2. Has also been applied as cells that enclose gonadial germ cells, follicle cells of an ovary, and cyst cell of the testis. cystogenic cells (PLATY Trematoda) Secretory cells in a cercaria that produce a metacercarial cyst. cystoidal diaphragm (BRYO...

Gynocophoral canal see gynaecophoral canal

Gr. gyne, woman genesis, descent Female parthenogenesis pseudogamy development of a haploid individual possessing only the maternal chromosome set. see androgenesis. gynomerogony n. Gr. gyne, woman meros, part gonos, seed Development of an egg fragment containing only the female nucleus (maternal chromosomes). gynosynhesmia n. Gr. gyne, woman syn, together hesmos, swarm A group of females gathering together during mating season. see androsynhesmia, synhesmia. gynozooid n. Gr....

Heterocotylus see hectocotylus

Gr. heteros, different daktylos, finger (AR-THRO Chelicerata) Having claws, apoteles or ungues differing from each other. heterodactyly n. see homodactyl heterodont a. Gr. heteros, different odous, tooth Having a variety of tooth types. heterodynamic a. Gr. heteros, different dynamis, power Genes not simultaneously influencing the same developmental process. heterodynamic life cycle 1. A life cycle in which there is a period of dormancy. 2. A life cycle that includes a rest...

Axis cylinder An axon

Gr. axon, axle blastos, bud (MESO Rhombozoa) Germinal cells of dicyemids that undergo cleavage and produce new individuals. axocoel n. Gr. axon, axle koilos, hollow (ECHINOD) The first pair of coelomic sacs in an embryo, that open to the surface by the hydropore. axon, axone n. Gr. axon, axle A long-unbranched or sparsely branched, nerve fiber, which usually conveys impulses away from the cell-body of its neuron. axoneme n. Gr. axon, axle nema, thread The core of a cil-ium or...

Genal ctenidium see ctenidium

Genal groove (ARTHRO Insecta) In Diptera, a depressed and groove-like area near the ventral limits of the ptilinal suture and the juncture of the gena and parafacial cheek groove transverse impression. genal orbit (ARTHRO Insecta) That area of an orbit adjacent to the ventral margin of a compound eye. genaponta n. L. gena, cheek pons, bridge (ARTHRO In-secta) In specialized Hymenoptera, a bridge composed of the fused postgenae that closes the underside of the head behind the mouth.

Hook hooklets see hamulus uncus

Gr. hoplon, implement chaite, hair (ANN Oligochaeta) Denoting earthworm male terminalia in which one pair of sperm ducts open together with the prostatic ducts of segment xvii or close to the prostatic pores, the other pair of sperm ducts similarly associated with the prostates of segment xix. horiodimorphism n. Gr. horios, in season dis, twice mor-phe, form Seasonal dimorphism. horismology n. Gr. horos, boundry logos, discourse (ARTHRO Insecta) Scientific description of the...

Hypophare see hypomere

Hypopharyngeal glands (ARTHRO Insecta) In bees, paired glands in the facial part of the head that open through the lateral areas of the hypopharynx pharyngeal glands food hypopharynx n. Gr. hypo, under pharyngx, pharynx 1. (AR-THRO Chelicerata) The chitinous plate situated on the labium in certain Acari. 2. (ARTHRO Crustacea) The metastoma. 3. (ARTHRO Insecta) a. A median mouth-part structure anterior to the labium, usually associated with the salivary glands by ducts. b. A tongue-like lobe...

Nematoidea see Nemata

Gr. nema, thread logos, discourse That branch of zoology dealing with nematodes. Nematomorpha, nematomorphs n. n.pl. Gr. nema, thread morphos, form A phylum of worm-like animals that are free-living as adults and parasitic in arthropods as juve niles horsehair worms gordian worms. nematophagous a. Gr. nema, thread phagein, to eat Feeding on nematodes. nematophore n. Gr. nema, thread phorein, to carry (CNID Hydrozoa) A club-like or capitate ended structure in a hy-droid colony...

Head bulb see ballonets

Head-fans (ARTHRO Insecta) In Diptera, fan-like rays on the main part of the torma of mature larva of Simuliidae that function as filtering organs in running water, or a raking function in Crozetia . head gland (PLATY Trematoda) Glands of circaria which produce a secretion emitted into the matrix of the tegument that is thought to function in the postpenetration adjustment of the schistosomula. head valve (MOLL Polyplacophora) The anterior valve of chitons. heart n. A.S. heorte Sometimes used...

Biophotogenesis see bioluminescence

Gr. bios, life physis, nature The application of the laws of physics to the study of living organisms. bioplasm n. Gr. bios, life plassein, to mold Protoplasm. bioplast n. Gr. bios, life plassein, to mold 1. A minute mass of living protoplasm. 2. An amoeboid cell. biopoiesis n. Gr. bios, life poiesis, making The origination of the first living thing, as well as the preceding chemical history. biopotentiality n. pl. -ties Gr. bios, life L. potens, powerful The potential of a tissue...

Quadricolumella see columella

L. quadrus, fourfold dentatus, tooth Having 4 teeth or tooth-like processes. quadrifid a. L. quadrus, fourfold Four rows in 4 segment. quadrilateral a. L. quadrus, fourfold latus, side 1. Formed or bounded by 4 sides 4 lines. 2. (ARTHRO Insecta) In zy-gopterous Odonata, the discal wing cell. quadrimaculate a. L. quadrus, fourfold macula, spot Having 4 spots. quadripartite a. L. quadrus, fourfold partitus, divided In 4 parts. quadripinnate a. L. quadrus, fourfold penna, feather...

Rhabditoid bursa see bursa

Rhabditoid larva (NEMATA) A bacterial feeding larva among free-living or parasitoid forms, in which the esophagus is divided into corpus, isthmus and a posterior valved bulb. rhabdocrepid a. Gr. rhabdos, rod krepis, boot (PORIF) A desma deposited on a diactinal monaxon. rhabdoid n. Gr. rhabdos, rod eidos, like 1. Rod-like any rod-shaped body. 2. (CNID) Nematocysts that open at the tip with a definite cylindrical hempe. 3. (PLATY Turbellaria) A group of epidermal and subepidermal inclusions...

Rami pl of ramus

L. ramus, branch cornu, horn (ARTHRO Insecta) Having a branched antennae. ramicostellate a. L. ramus, branch dim. costa, rib (BRACHIO) Having a costellae on the shell resultant from branching. ramification n. L. ramus, branch ficare, to make Branching out in all directions offshoot. ramiform a. L. ramus, branch forma, shape Resembling or shaped like branches. ramify v. -fied -fying L. ramus, branch ficere, to make To send forth outgrowth or branches.

Nectozooid see nectophore

Needham's sac organ MOLL Cephalopoda In males, a specialization of the sperm duct for formation and storage of spermatophores spermatophoric sac. negative geotropism Movement directed away from the earth's gravitational force. negative phototropism The tendency to retreat from light. negative tropism The tendency to retreat from stimuli. nekton n. Gr. nektes, swimmer Organisms that swim in the open water, i.e., jellyfish, squid, fishes, turtles, seals and whales necton. see seston. nema n. Gr....

Metatergum see metanotum

Gr. meta, after theein, to run telos, end ARTHRO 1. A neotenous adult arthropod after undergoing normal or more than normal numbers of molts. 2. In Insecta, often resulting in failure to develop wings, or forming brachypterous adults. metathoracotheca n. Gr. meta, after thorax, chest theke, case ARTHRO Insecta The pupal covering of the metathorax. metathorax n. Gr. meta, after thorax, chest ARTHRO Insecta The third or posterior segment of the thorax, bearing the hind legs and the...

Biocontrol see biological control

Gr. bios, life kyklos, circle Subdivisions of the biosphere land, sea and freshwater. biodegradable a. Gr. bios, life L. de, down gradatus, step by step abilis, tending to be Substances that can be broken down by micro-organisms mainly aerobic bacteria . biodemography n. Gr. bios, life demos, people graphein, to write A science concerned with the statistical study of the ecology and genetics of a given population. bioecology n. Gr. bios, life oikos, house logos, discourse The study...

Bicondylic see dicondylic

L. bis, two Gr. konos, cone Being formed as two cones placed base to base. biconvex a. L. bis, two convexus, arched outward Being convex on opposite sides lens-shaped. see amphicyrtic, amphicoelous. bicorn a. L. bis, two cornu, horn Bearing two horns cres bicornuate a. L. bis, two cornutus, horned Having two horns or cephalic processes. bicornuate uterus A uterus in which both uteri are fused, but have short lateral extensions. bicuspidate a. L. bis, two cuspidatus, pointed Being...

Subclypeal tube see pseudotrachea

L. sub, under colonia, farm BRYO Stenolae-mata A functional grouping within a colony, in which the skeletons may or may not be of the same structure. subcosta n. L. sub, under costa, rib ARTHRO Insecta A longitudinal vein between the costa and the radius. subcoxa n. L. sub, under coxa, hip 1. ARTHRO A secondary proximal subdivision of the coxopodite. 2. ARTHRO Crustacea see precoxa. subcoxal pleurites 1. ARTHRO Insecta Sclerites that are separated primitively or fused, that form...

Calicle see calycle

Calicoblastic epithelium CNID Anthozoa A specialized portion of the ectoderm of corals that produces the aragonite skeleton in the true or stony corals. caliology n. Gr. kalia, hut logos, discourse The study of dwellings or natural shelters utilized by animals. callosity n. pl. -ties L. callus, hard skin 1. A state or quality of being callous. 2. MOLL Gastropoda The local thickened part of the callus or inductura of the shell. callous a. L. callus, hard skin Hardened having a callus or...

Parauterine organ see paruterine organ

Gr. para, beside L. axis, axle 1. To move parallel to the body axis. 2. par-axial ARTHRO Chelicerata In spiders, pertaining to chelicerae with the paturon projecting forward with the fangs moving in a downward direction. see di-axial. paraxial organs ARTHRO Chelicerata Special gland pockets that produce the spermatophores of male Scorpions. paraxon n. Gr. para, beside axon, axle The collateral branch of an axon. Parazoa n. Gr. para, beside zoon, animal A subkingdom containing...

Monocondylar see monocondylic

Gr. monos, one kondylos, knuckle Having one condyle. monocondylic joint A joint with a single point of articulation between segments. monocrepid a. Gr. monos, one krepis, base PORIF Pertaining to a desma formed on a monaxon. monocule n. Gr. monos, single L. oculus, eye ARTHRO A one-eyed animal, as certain crustaceans and insects. monocyclic a. Gr. monos, one kyklos, circle ECHINOD Cri- noidea Refers to calyx plates of primitive stalked crinoids having an aboral cycle of 5 plates...

Photopic see apposition eye

Photoreactivation reaction Partial reversal of damage to biological systems by ultraviolet light by longer wave length light. photoreceptor n. Gr. phos, light L. receptor, receiver A sense organ responsive to light. photosynthesis n. Gr. phos, light synthesis, place together The formation of carbohydrates from carbon dioxide and water by the absorption of light by chlorophyll. phototaxis n. Gr. phos, light taxis, arrangement The movement in response to the stimulus of light. see helio-taxis....

Occipital tentacle see cirrus

L. occiput, back of the head ARTHRO Insecta 1. The dorsal posterior part of the cranium, between the occipital and postoccipital sutures in many the boundaries with the vertex and postgenae are not delimited. 2. In Formicidae, the short region between the vertex and the neck. occipital a. occludent margin ARTHRO Crustacea In Cirripedia, the margin of the scutum and tergum bordering the orifice. occludent teeth ARTHRO Crustacea In Cirripedia, small projections on the occludent scutal...

Prothoracic shield see cervical shield

Gr. pro, before thorax, chest ARTHRO Insecta The first segment of the thorax, bearing the front legs, but no wings manitruncus corselet. prothoracic a. protobranchite n. Gr. protos, first branchiae, gills ARTHRO Insecta Respiratory apparatus contained in the rectum of nymphal Odonata. see branchial basket. protocephalon n. Gr. protos, first kephale, head 1. ARTHRO Insecta The procephalic part of the definitive head during evolutionary stages. 2. ARTHRO Crustacea see ac-ron....

Water pore see hydropore

Waterston's organ ARTHRO Insecta In Hymenoptera Cera-phronidae, a medial patch of reticulum on the 5th gastric tergite function unknown. water vascular system ECHINOD A unique system comprised of tube-like body wall appendages tube-feet , and a system of canals derived from the coelom. wax n. A.S. weax, wax ARTHRO Insecta A substance secreted by various insects consisting of a complex mixture of lipids, varying from species to species. wax gland Any gland in various parts of the body that...

Prohaemocyte see prohemocyte

Gr. pro, before haptein, to fasten PLATY Tre-matoda In Monogenea, the anterior adhesive and feeding organs. prohemocyte, prohaemocyte n. Gr. pro, before haima, blood kytos, container ARTHRO A small, round, oval or elliptical hemocyte with a relatively large nucleus and intensely basophilic cytoplasm that divides and gives rise to other types of cells hemocytoblast stem cell urzellen. prolegs n.pl. L. pro, before ON. leggr, leg ARTHRO Insecta The fleshy abdominal legs of larvae...