Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 765smaller than a tubercle. 2. (BRYO) A small regular skeletalstructure of crinkled laminae.putative a. [L. putare, to think] Commonly regarded as such;reputed to be; supposed.pycnosis n. [Gr. pyknos, dense] Degeneration of a cell nucleuscharacterized by condensation and an increased affinity forstain. pycnotic a.pygal a. [Gr. pyge, rump] Situated back, or pertaining to theposterior end of the back. pygidial a.pygidial fringe (ARTHRO: Insecta) In homopteran Coccoidea,the projecting ends of the lateral margin of the pygidium;the lateris.pygidial glands (ARTHRO: Insecta) 1. In Coleoptera, pairedorgans opening beneath the last abdominal tergite thatfunction to secrete a corrosive, pungent defense fluid, or asubstance that lowers surface tension of the water to increasepropulsion; also called anal glands. 2. In Hymenoptera,associated with the membrane between abdominalterga 6 and 7 of Formicidae, and when enlarged, produce adefensive secretion; also called anal glands. see post-pygidialgland.pygidial incision see anal cleftpygidial plate (ARTHRO: Insecta) In Hymenoptera, a flat platesurrounded by a carina or line, sometimes an apical projectionon the 6th gastral tergite in females and 7th inmales.pygidial setae see anal setaepygidium 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 lateralmargins.pygomere n. [Gr. pyge, rump; meros, part] (ANN: Oligochaeta)The terminal part of the body; sometimes calledanal segment, although some of the characters of a