Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 111mediately posterior to the lips, that form a collarette inGnathostomatidae; head bulb of some authors.ballooning n. [OHG. balla, a spherical body] (ARTHRO: Chelicerata)Flying through the air on silken lines spun by spiders.band n. [A.S. bindan, band] 1. A transverse marking broaderthan a line. 2. (ARTHRO: Insecta) a. In Diptera, the chromosomepairing of like chromomeres that produce the giantchromosomes. b. In male Lepidoptera, a descriptiveterm of a linear series of cornuti.barb n. [L. barba, beard] 1. Any spine or hair-like bristle with aprocess projecting obliquely or crosswise from the surface.2. A spine with teeth pointing backward.barbate, barbatus a. [L. barba, beard] Tufts or fascicles ofhair or short bristles; bearded; having tufts of hair.barbula n.; pl. -lae [L. dim. barba, beard] (ARTHRO: Insecta)In Coleoptera, a tuft of hairs or short bristles at the sides ofthe abdomen near the anal region of scarabaeoid larvae.bark n. [Sw. bark, rind] (PORIF) The outer casing of spongin ofthose having discontinuous fiber structure.baroceptor, baroreceptor n. [Gr. baros, weight; L. capere, totake] An organ perceiving changes in pressure.barotropism n. [Gr. baros, weight; tropein, to turn] A responseto pressure stimuli.barrier n. [OF. barre, bar] An obstacle or obstruction that limitsthe spread or distribution of animals.barrier reef see coral reefbasad adv. [L. basis, base; ad, to] Toward the base.basal a. [L. basis, base] Pertaining to the base; near the pointof attachment of a structure or appendage.basalar a. [L. basis, base; ala, wing] (ARTHRO: Insecta) Pertainingto the sclerites below the wing base.basal bud (BRYO: Gymnolaemata) The bud arising from thebasal wall of the parent zooid. see distal bud.basal canal (BRYO) The circumoral lacuna of the lophophoreinto which the internal lacunae of all the tentacles open.