allotype n. [Gr. allos, other; typos, type] A paratype of the opposite sex to the holotype.
allozygote n. [Gr. allos, other; zygotos, yoked] A homozygote with only recessive characters.
alluring coloration (ARTHRO: Insecta) Patterns or colorings adapted by predators that attract other species; aggressive mimicry.
alluring glands Glandular structures that disperse an odor attractive to the opposite sex; sex pheromones.
allux n. [L. ad, to; luxus, dislocated] (ARTHRO: Insecta) In Cur-culionidae, the next to the last joint of the tarsus.
alpha-chlorophyll n. [Gr. alpha, a; chloros, green; phyllon, leaf] (ARTHRO: Insecta) Chlorophylic properties producing coloration. see beta-chlorophyll.
alpha-female n. [Gr. alpha, a A; L. femina, female] (ARTHRO: Insecta) In Formicidae, the intermediate form between the teratogyne and normal female.
alpha taxonomy That level of taxonomy involved with the characterization and naming of species. see beta taxonomy.
alpine a. [L. alpinus, of or like high mountains] Applied to organisms occurring in high mountain meadows; also referred to as alpestrine.
altaceratubae n. [L. alter, the other; Gr. keras, horn; tuba, trumpet] (ARTHRO: Insecta) In certain scale insects, ceratubae shaped like large broad cylinders with oblique openings, located at or near the margin of the pygidium.
alteration theory Explanation of the phenomenon of electromotive forces of nerve and muscle by changes in chemical composition of tissue in cross-section.
alternate host One that alternates with another in the life cycle of a parasite. see intermediate host.
alternating cleavage see spiral cleavage alternation of generations The alternation of two or more generations reproducing in different ways; an alternation of sexual and asexual, or parasitic with a free-living cycle. see alloiogenesis, digenesis, heterogamy, heterogenesis, heterogony, metagenesis.
alternative inheritance see allelism altitude see height altricial a. [L. altrix, nourisher] Having young at hatching or birth that require care for sometime.
altruism n. [L. alter, the other] Behavior disadvantageous to the individual, but benefits other individuals of the species.
alula n.; pl. -lae [L. dim. ala, wing] (ARTHRO: Insecta) 1. In some Diptera, one of the membranous lobes in the region of the wing base, thought to be part of the vannal region. see thoracic squama, alar squama. 2. In some Coleoptera, the alula is folded beneath the elytron/jugum.
alulet n. [L. dim. ala, wing] (ARTHRO: Insecta) In Diptera, a lobe at the basal posterior part of the wing; wing appendage; posterior lobe. see alula.
alutaceous a. [L. alutaceus, soft leather] Pertaining to brown or brownish-yellow; leathery; covered with, or appearing like, minute cracks.
alveator n. [L. alveatus, hollowed out] (ECHINOD) A form of pedicellaria; usually two valved and recessed into an alveolus or depression in the endoskeleton.
alveola n.; pl. -lae [L. alveolus, small cavity] A small pit or depression on the surface of an organ; faveolus; alveolus. alveolar a.
alveolar hydatid cyst (PLATY: Cestoda) A larval form of Echi-nococcus multilocularis comprised of many compartments containing many protoscolices that infiltrate body tissues.
alveolate a. [L. alveolus, small cavity] Deeply pitted or having the appearance of a honeycomb.
alveolus n.; pl. -eoli [L. alveolus, small cavity] Any small cavity, pit or depression; alveola.
amacrine a. [Gr. a, without; makros, long; inos, fiber] (AR-THRO: Insecta) Pertaining to a unipolar nerve cell within a synaptic region of the brain, i.e., the antennal lobes or the medulla. amacrinal a.
amalgamated lips (nemata) Lips combined together giving a smooth contour, not discernibly separated from each other.
amastigophore n. [Gr. a, without; mastix, whip; pherein, to bear] (CNID) A nematocyst with no tube beyond the hempe; in microbasic types , the hempe is not more than three times the capsule length; in macrobasic types , the hempe is more than four times the capsule length. see mastigophore.
amber n. [Ar. anbar ambergris, a fossilized resin] A transparent, clear, pale yellow-brown gummy resin of coniferous trees in which insects and spiders were trapped and fossilized in the hard transparent state as much as 30 million years ago.
ambient a. [L. ambire, to go around] Moving around; surrounding.
ambient vein (ARTHRO: Insecta) 1. The vein that partially encircles the wing close to the margin. 2. The vein-like structure that serves to stiffen the margin of a wing.
ambifenestrate a. [L. ambo, both; fenestra, window] (NEMATA) A term used to describe two semifenestrae in the vulval cone formed by a narrow vulval bridge, but not surrounding the vulva. see bifenestrate.
ambiguous a. [L. ambigere, to wander about] Vague or doubtful in meaning; having more than a single meaning.
ambilateral a. [L. ambo, both; latus, side] Pertaining to or affecting both sides; bilateral.
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