Pecking order see hierarchy

pecten n.; pl. pectines [L. pecten, comb] 1. Any comb- or rake-like structure. 2. (ARTHRO: Chelicerata) In Scorpiones, one of a pair of appendages on the somite immediately behind the genital somite. 3. (ARTHRO: Insecta) a. In Culici-dae, a Culicinae larvae, bearing a comblike row of spicules on the basal part of the siphon; in Anophelinae and Dixidae larvae, borne on the posterior margin of the pecten plate. b. In Apidae, the pollen rake. c. In genitalia, distally pointing rows of comblike teeth lining the articular membrane of the gonopophyses. d. In Diaspidinae, see gland spines.

pectina n.; pl. -ae [L. pecten, comb] (ARTHRO: Insecta) One of the broad fringed plates on the pygidium of coccids.

pectinate a. [L. pecten, comb] 1. Having branches or processes like a comb. 2. Of claws; having teeth.

pectinate chaeta (ANN: Oligochaeta) Crochet seta with two lateral teeth with several fine teeth between.

pectinations n.pl. [L. pecten, comb] (MOLL: Polyplacorphora) Small sharp teeth on the outer edges of the insertion plates.

pectunculate a. [L. pecten, comb; -unculus, little] Having a row of minute appendages; pectunculoid.

pectus n. [L. pectus, breast] (arthro) A sclerite composed of pleuron fused with the sternum.

pedal a. [L. pedis, foot] Pertaining to a footlike appendage.

pedal disc (CNID: Anthozoa) In Actinaria, the base or foot.

pedal elevator muscle (MOLL: Bivalvia) Muscle fibers attached in the umbonal cavity that raise the foot.

pedal gape (MOLL: Bivalvia) Opening between shell valves that allows extension of the foot.

pedal glands (ROTIF: Bdelloidea) Glands in the retractile foot, opening through the toes, that secrete an adhesive to attach the animal to the substrate while feeding.

pedal groove (MOLL: Solenogastres) A longitudinal fold or folds with ciliated and secretory cells in the median ventral position.

pedalium n.; pl. -alia [Gr. pedalion, rudder] (CNID) Bladelike expansions at each corner of the umbrella that bear a motile and contractile hollow tentacle or group of tentacles.

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