pterygogenea n.pl. [Gr. pteryx, wing; genos, race] (ARTHRO: Insecta) 1. Winged adult insects. 2. Descended from winged ancestors. see apterygogenea.
pterygoid a. [Gr. pteryx, wing; eidos, like] Wing-like.
pterygopolymorphism n. [Gr. pteryx, wing; polys, many; morphos, shape] (ARTHRO: Insecta) Occurrence of different forms of wings in the same species.
pterygostomial region (ARTHRO: Crustacea) In Decapoda, the anterolateral part on the ventral surface of the carapace, on opposite sides of the buccal cavity; jugal region; ptery-gostome.
pterygostomial spine (ARTHRO: Crustacea) In Decapoda, a spine on the anterolateral angle.
Pterygota, pterygotes n.; n.pl. [Gr. pterygotos, winged] (ARTHRO: Insecta) A subclass containing the winged and secondarily apterous insects, with varied metamorphosis, and have no pregenital abdominal appendages. see Exoptery-gota, Endopterygota.
ptilinal suture (ARTHRO: Insecta) In Diptera, a crescent-shaped groove, situated on the lower part of the frons between the bases of the antennae and the eyes, which usually extends ventrally into the facial area; frontal suture.
ptilinum n.; pl. ptilina [Gr. ptilon, feather] 1. (ARTHRO: Insecta) In Diptera, a temporary bladderlike structure of a pupa that can be inflated and thrust out through the frontal (ptilinal) suture, just above the bases of the antennae, that pushes off the operculum of the puparium. 2. (NEMATA) Sometimes inappropriately used to describe horn-like or leaf-like ornamentation on the anterior extremity of parasitic forms.
ptilota n. [Gr. ptilon, feather] (ARTHRO: Insecta) Winged insects.
ptychoidy n. [Gr. ptyche, fold] (ARTHRO: Chelicerata) In Oribatida, an articulation between the prosoma and opist-hosoma, allowing the legs to be concealed by down folding of the prosoma.
ptycholophous a. [Gr. ptyche, fold; lophos, crest] (BRACHIO) A lophophore with brachia folded into one or more lobes in addition to a median indentation. ptycholophus n.
pubescence n. [L. pubescere, to grow hairy] A covering of fine soft hairs. pubescent a.
pubic a. [L. pubes, adult] Referring to the area of the genitalia.
pubic process (ARTHRO: Insecta) In Scarabaeoidea, fused pubic plates above the second valvifers (fused second valvu-lae).
puce n. [L. pulex, flea] Dark brown or purplish brown.
pudendum n. [L. pudenda, external genitals] External female genitalia; the vulva.
puerulus n. [L. puerilis, childish] (ARTHRO: Crustacea) 1. Preadult stage of Decapoda Scyllaridae; nisto, pseudibacus. 2. Preadult stage of Decapoda Palinuroidea.
puffs n. [ME. puf] (ARTHRO: Insecta) In Diptera, a process in which the bands (chromomeres) of the chromosomes of the salivary glands undergo puffing which is usually correlated with the production of exportable proteins in the glandular cells; thought to reflect gene activity.
pulmonarium n.; pl. -ria (ARTHRO: Insecta) A type of abdomen with membranous connections between the sclerites of the terga and pleura of the abdominal rings.
pulmonary a. [L. pulmo, lung] Pertaining to the lungs.
pulmonary cavity/sac (MOLL: Gastropoda) In Pulmonata, a pallial cavity formed by transverse vascularizations of the interior dorsal wall.
pulsatile vesicles (ANN: Hirudinoidea) Eleven small hemispherical pulsing structures filled with coelomic fluid.
pulsating vesicle (ROTIF) Small bladder-like excretory organ into which the flame bulb system empties.
pulverulent a. [L. pulvereus, full of dust] Powdery; dusty; farinaceous.
pulvilliform a. [L. pulvillus, little cushion] (ARTHRO: Insecta) Appearing lobelike or padlike; shaped like a pulvillus.
pulvillus n.; pl. -li [L. pulvillus, little cushion] (ARTHRO: Insecta) In Diptera, the pad of the membranous lobe beneath the tarsal claw, arising from the base of each auxilia. see
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