penial chaeta/seta (ANN: Oligochaeta) One of the extra seta near the male pore that facilitate the passage of sperm during copulation; usually long, sculptured, and in paired bundles.
penicilla n.; pl. -ae [L. penicillum, painter's brush] (ARTHRO: Crustacea) In certain Anaspidacea, dentate setae on the mandible.
penicilliform a. [L. penicillum, painter's brush] Having the form of a brush or pencil; tipped with fine hairs or fibers.
penicillum, penicillus n.; pl. -li [L. penicillum, painter's brush] A pencil or brush of setae or hair.
peniferum n. [L. penis, male copulatory organ; ferum, bear] (ARTHRO: Crustacea) In Ostracoda, the varied, sclerotized male copulatory apparatus that bears the penis and hinge on which the apparatus may turn around the zygum.
penis n.; pl. -es [L. penis, male copulatory organ] A male copulatory organ or paired organs for conveying sperm to the genital tract of a female. see phallus, aedeagus.
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