pygidium n.; pl. -dia [Gr. pygidion, narrow rump] 1. (ANN) The telotroch and anal region behind it, bearing cirri. 2. (ARTHRO: Insecta) The last dorsal segment of the body. pygal, pygidial a.
pygofer n. [Gr. pyge, rump; L. fero, carry] (ARTHRO: Insecta) In Homoptera, the last abdomenal segment bearing lateral margins.
pygomere n. [Gr. pyge, rump; meros, part] (ANN: Oli-gochaeta) The terminal part of the body; sometimes called anal segment, although some of the characters of a metamere are missing.
pygophore n. [Gr. pyge, rump; phoreus, bearer] (ARTHRO: In-secta) 1. The pygofer. 2. In male Heteroptera, the 9th abdominal segment. 3. In male Homoptera, the posterolateral extension of the 9th abdominal segment.
pygopid loop (BRACHIO) A short ringlike loop with slightly arched cross band.
pygopods n. [Gr. pyge, rump; pous, foot] (ARTHRO: Insecta) The paired appendages of the 10th abdominal segment.
pygostyle n. [Gr. pyge, rump; stylos, pillar] (ARTHRO: Insecta) In Hymenoptera, small lateral setigerous processes on the 9th gastral tergite.
pyllopod n. [Gr. pyle, gate; pous, foot] (ARTHRO: Crustacea) In gnathiidean Isopoda, the second thoracopod; fused to the head resulting in the appendages being second maxilli-pedes and in males are flat and cover the buccal area, but in females, a short palp with a large flat plate attached.
pyloric valve 1. (ARTHRO: Insecta) A regulatory (sphincter) at the entrance to the intestine from the stomach; usually located behind the stomach in the anterior part of the proctodeum. 2. (ARTHRO: Crustacea) see cardiac pyloric valve.
pylorus n. [Gr. pyloros, gatekeeper] 1. (ARTHRO: Insecta) A short distinct section of the proctodeum intervening between the ventriculus and true intestinal tube, containing the pyloric valve. 2. (BRYO) Ciliated part of the digestive tract into which the stomach part of the cardia empties. pyloric a.
pyraform glands (ACANTHO) Glands in the tail of some males; function unknown.
Was this article helpful?