Gill separator see epipodite

gill tuft A group of mainly lateral, filamentous gills.

Gilson's glands (ARTHRO: Insecta) In Trichoptera, thoracic glands homologized to coxal glands or nephridia.

ginglymus n. [Gr. ginglymos, hinge-joint] (ARTHRO: Insecta) In dicondylic jaws, a cavity or groove of the mandible that hinges on a convex process of the clypeus forming the anterior joint.

gin-traps (ARTHRO: Insecta) In certain coleopteran larvae, local sclerotization of opposable edges of adjacent abdominal segments, supposed organs of defense against arthropod predators.

girdle n. [A.S. gyrdel, a girdle] (MOLL: Polyplacophora) Flexible muscular integument, plain or leathery, or variously ornamented, holding the chiton valves in place; perinotum; girdle.

gizzard n. [OF. gezier, gizzard] 1. A grinding chamber of various invertebrates. 2. (ANN: Oligochaeta) A muscular area of the digestive system between intestine and crop. 3. (ar-THRO) For Insecta and Crustacea, see proventriculus. 4. (BRYO: Gymnolaemata) In Ctenostomata, an elongate or spherical inner part of the cardia with pointed or rounded plates or teeth. 5. (ECHI) The short, muscular region of the posterior foregut usually marked by ringed or annular striations. 6. (MOLL) A thickened muscular stomach, or lined with calcareous plates for crushing food.

glabella n. [L. dim. glaber, bald] (ARTHRO: Trilobita) A thickened, median elevated cephalic shield of trilobites.

glabrous a. [L. glaber, bald] Smooth, free of hair.

gladiolus n. [L. dim. gladius, sword] The mesosternum.

gladius n. [L. gladius, sword] (MOLL: Cephalopoda) In Sepii-dae, Octopoda, and Teuthoidea, the horny endoskeleton or pen of endocochleates; the internal shell.

glairy a. [L. clarus, clear] Pertaining to glair, or white of an egg.

gland n. [L. dim. glans, acorn] An organ or cell specialized for secretion, either for use in the body or for excretion.

gland cell A single secreting cell.

glandiform a. [L. dim. glans, acorn; forma, shape] Acorn-shaped.

glandilemma n. [L. dim. glans, acorn; Gr. lemma, skin] The capsule of a gland.

gland of Leiblein (moll) A gland connected to the modified esophagus by a duct that secretes a strong proteolytic enzyme in some predaceous mollusks and carbohydrase in vegetarians.

gland orifice Any external opening for gland secretion.

gland shields (ANN: Polychaeta) In tube-builders, a pair of large mucous-secreting pads which lay down a coating on the inner surface of the tube.

glands of Batelli (ARTHRO: Insecta) In Hemiptera, large hypodermal glands in the Cercopidae; formerly believed to produce the spittle.

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