spurious vein (ARTHRO: Insecta) A fold or thickening of the wing membrane between two true veins.
squama n.; pl. -mae [L. squama, scale] 1. Any decumbent scale. 2. (ARTHRO: Crustacea) A scale-like exopod of the antenna. see scaphocerite. 3. (ARTHRO: Insecta) a. In Hymenoptera, a dorsolateral lobe of the phallobase; in ants, the first abdominal segment. b. In Hemiptera, the fimbriate or spine-like marginal process of coccoids; plates; scaly hairs. c. In Lepidoptera, the scale-like structure covering the wing base of the fore wings. see patagium. d. In Diptera, the calypters; palpiger; alar squama; antisquama; alula; in mosquitoes, the short broad scales on the wing veins; median scale; flat scale. e. In Odonata, the lateral expansion of the mentum. f. In Diaspidinae, see gland spines. 4. (MOLL: Bivalvia) A thin, long, concentric imbrication.
squamate, squamiform a. [L. squama, scale] Scale-like; squamoid.
squamous, squamose a. [L. squama, scale] Covered with scales.
squamul alaris see alar squama squamulate, squamulose a. [L. dim. squama, scale] Having small scales.
squarrose a. [L. squarrosus, rough] Rough with projecting scale-like processes, divided into upright and nonparallel with the plane.
squat a. [OF. esquatir, to press down] More broad in proportion than to height.
stabilamentum, stabilimentum n. [L. stabilis, firm; amentum, strap] (ARTHRO: Chelicerata) In Arachnida, one of a series of obvious zigzag lines at the hub of certain orb spider webs that warn birds to avoid them.
stadium n.; pl. stadia [L. stare, to stand] 1. The stage or period in an animals life. 2. The interval between molts of a larva; stade. see instar.
stage see stadium stalk n. [A.S. stel, stalk] A supporting structure, such as a pedicel.
staphyla n.; pl. staphylae [Gr. staphyle, bunch of grapes] A group of gongylidia used as food by Attine ants that grow the fungus.
stase n. [Gr. stasis, standing] (ARTHRO: Chelicerata) 1. One of the successive instars of the postembryonic development of a specific species. 2. In Acari, an instar independent of growing molts, that is distinct within a species and can be homologized with the corresponding instars of other species.
stasis n. [Gr. stasis, standing] The stopping of normal processes, i.e., growth, fluid movement, etc.
stasoid a. [Gr. stasis, standing; eidos, like] (ARTHRO: Chelicerata) The life cycles of some instars that cannot be homolo-gized with corresponding instars of other species of the same group.
statary phase (ARTHRO: Insecta) In Hymenoptera, a period in the army ant cycle in which the colony does not move from site to site; the queen lays eggs, and the brood is mostly eggs and pupae. see nomadism.
static a. [Gr. statikos, to cause to stand] Pertaining to rest or equilibrium. see dynamic.
statis organ see statocyst statis sense The sense of balance or maintenance in the air or water.
statistical method Special mathematical methods for the elucidation of quantitative variations affected by a multiplicity of factors.
statoblast n. [Gr. statos, fixed; blastos, bud] (BRYO: Phylac-tolaemata) A sessile or free, ovoid or discoid chitinized bud, with large yolky cells and organized germinal tissue, that give rise to polypides; resting buds; winter eggs. see floatoblast.
statocone n.; pl. -ia [Gr. statos, fixed; koni, dust] A minute calcareous granule in a statocyst.
statocyst n. [Gr. statos, fixed; kystis, bladder] An organ of balance found in many invertebrates, variable in structure from an open canal, vesicle, or closed chambers composed of one to many cells (lithocytes), that contains a concretion of granules of sand, lime, diatom shells or quartz grains (statolith), or capsules of ciliated cells enclosing a fluid with one or more statoliths suspended within; otocyst.
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