Hamabiosis see neutralism

hamate, hamiform a. [L. hamus, hook] Hooked; bent at the end resembling a hook; aduncate.

hamatype n. [Gr. hama, together; typos, type] Obs. A specimen from the type lot of a species, not specified as a holotype or paratype; a special group of topotypes.

hammock n. [Sp. hamaca, swinging couch] (ARTHRO: Insecta) Has been used to describe the hammock-like covering of a caterpillar.

hampe n. [F. shank, stalk] (CNID) The basal tube portion of the nematocyst; the butt.

hamula n. [L. hamulus, little hook] (ARTHRO: Insecta) A trigger-1 i ke hook securing the springing organ (furcula) of springtails; a retinaculum.

hamular hook (ARTHRO: Insecta) In some male Odonata, a curved hook receiving the end of the basal lobe of the posterior hamuli.

hamulohalterae n.pl. [L. hamulus, little hook; Gr. halter, balancer] (ARTHRO: Insecta) In Homoptera, giant mealybug halters developed from the metathoracic wing-buds furnished with one or more hooklets that engage in a basal pocket of the corresponding fore wing.

hamulus n., pl. -li [L. hamulus, little hook] 1. A hook or hooklike process. 2. (ARTHRO: Insecta) a. In certain Hymenop-tera, a row of minute hooks along the costal margin of the hind wing to unite the front and hind wings in flight; has been spelled humule. b. In male Odonata, one of a pair of anterior(is) and posterior(is) clasps of the genitalia (fenestra) for grasping the female. c. In Siphonaptera, one of a pair of movable sclerites originating from the lateral wall of the aedeagal palliolum. 3. (platy: Trematoda) In monoge-netic forms, large hooks on the opisthaptor; anchors.

hamus n.; pl. hami [L., hook] (ARTHRO: Insecta) 1. In Heter-optera, an abrupt spur-like vein in the hind wings. 2. In Lepidoptera, the retinaculum.

Hancock's glands (ARTHRO: Insecta) In Orthoptera, large, glandular, sex-attractant pits of male tree crickets that secrete a fluid which the female ingests during the mating act.

Hancock's organ (MOLL: Gastropoda) A succession of parallel folds on each side of the mouth in the groove between the cephalic shield and the foot in some Opisthobranchia; lateral sensory areas.

hapaloderes n.pl. [Gr. hapalos, tender; deire, neck] (KINOR) The first three juvenile stages of Echinoderidae in which a midterminal, lateral and middorsal spines are present. see habroderes.

haplobiont n. [Gr. haplos, simple; bios, life] An organism characterized by one morphological distinct generation.

haplo-diploidy (ARTHRO: Insecta) A normal reduction division occurring in the oocyte, fertilized eggs developing into females, unfertilized eggs into males; characteristic of Hy-menoptera and some other groups of insects.

haploid a. [Gr. haplos, single] Having one set of chromosomes; gametes are usually haploid. see diploid.

haplometrosis n. [Gr. haplos, single; metros, mother] (ARTHRO: Insecta) In Hymenoptera, the founding of a new colony by a single fertilized, egg laying queen; monometrosis. haplometrotic a. see temporary haplometrosis, ple-ometrosis.

haploneme a. [Gr. haplos, single; nema, thread] (CNID) Bearing threads of uniform diameter or slightly dilated at the base, but without a hampe; nematocysts, anisorhizas and isorhizas.

haploneural a. [Gr. haplos, single; neuron, nerve] Supplied with one simple nerve.

haplont n. [Gr. haplos, simple; -on, individual] An organism with haploid somatic nuclei; monoplont.

haplophase n. [Gr. haplos, single; phasis, look] The haploid phase or generation of the life cycle (meiosis to fertilization); gamophase. see diplophase.

haplosis n. [Gr. haplos, single; -sis, act of] Meiotic reduction.

haptolachus n. [Gr. haptos, fasten or join; lachos, part] (ARTHRO: Insecta) In scarbaeoid larvae, that part of the posterior epipharynx behind the pedium, usually below the crepis, comprised of the nesia, sensillae and crepis; proximal sensory area.

haptomerum n.; pl. haptomeri [Gr. haptos, fasten or join; meron, a part] (ARTHRO: Insecta) The medio-anterior region of the epipharynx of scarbaeoid larvae composed generally of sensory spots, sometimes setiferous.

haptor n. [Gr. haptos, fasten or join] 1. Organ of attachment; an acetabulum. 2. (PLATY: Trematoda) The pre-oral, oral or ventral sucker.

Hardy-Weinberg law The law stating that the frequency of genes in a large randomly mating population remains constant in the absence of mutation, migration and selection.

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