Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 829simple eyes (ARTHRO: Insecta) The ocelli.simple seta see unjointed setasimple skeletal wall (BRYO: Stenolaemata) Having the wallcalcified only on edges and one side.simple velum (ARTHRO: Crustacea) In Ostracoda, a velatestructure of flange- or ridgelike form.simple-walled colony see fixed-walled colonysinciput n. [L. semi-, half; caput, head] 1. Upper or forepart ofthe head. 2. (ARTHRO: Insecta) The head area between thevertex and clypeus, especially in Coleoptera.single band of crochets see mesoseriessingle-walled colony see fixed-walled colonysinistral a. [L. sinistra, left] Pertaining to the left; to the left ofthe median line.sinistral gastropods (MOLL) Having the genitalia on the leftside of the head-foot mass or pallial cavity, and commonlythe shell, when viewed with the apex uppermost, with theaperture on the left. see dextral gastropods.sinistron n. [L. sinistra, left] The left side of the body.sinistrorse a. [L. sinistra, left; vertere, to turn] An organismspirally twisting to the left. see dextrorse.sinuate a. [L. sinus, curve] Wavy; tortuous; curving in andout.sinuatolobate a. [L. sinus, curve; Gr. lobos, lobe] Sinuate andlobed.sinuosity a. [L. sinus, curve] Series of curves or bends.sinupalliate a. [L. sinus, curve; pallium, mantle] (MOLL: Bivalvia)Having a pallial sinus or recess in the posterior part ofthe pallial impression due to the retraction of the siphons.sinus n. [L. sinus, curve] A depression; bend; embayment.sinus gland (ARTHRO: Crustacea) Storage release site forneurosecretory material synthesized within the cell bodiescontaining hormones produced by x-organ and other sitesof the central nervous system.siphon n. [Gr. siphon, tube] Any tubular or siphon-like struc-