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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 675perianal a. [Gr. peri, around; L. anus] Situated or occurringaround the anus.periaxial a. [Gr. peri, around; L. axis] To surround an axis.peribuccal a. [Gr. peri, around; L. bucca, mouth cavity] Encirclingthe buccal cavity.pericardial cavity see dorsal sinuspericardial cells (ARTHRO: Insecta) Nephrocytes present onthe surface <strong>of</strong> the heart, or lying on the pericardial septumor the alary muscles.pericardial gland 1. (ARTHRO: Insecta) see prothoracic gland.2. (MOLL: Gastropoda) Marginal cells <strong>of</strong> the pericardium inProsobranchia; filled with yellow-green granules.pericardial sinus see dorsal sinuspericardium n. [Gr. peri, around; kardia, heart] The cavity enclosingthe heart as well as membranes lining the cavityand covering the heart. pericardial a.pericaryon see perikaryonpericentric inversion An inversion that includes the centromere.perichaetine a. [Gr. peri, around; chaite, mane] (ANN: Oligochaeta)Referring to setal location, when there is morethan 8 per segment, encircling a segment; perichaetal condition.perideltidium n.; pl. -ia [Gr. peri, around; dim. delta, ](BRACHIO) One <strong>of</strong> a pair <strong>of</strong> raised triangular areas on eitherside <strong>of</strong> the pseudodeltidium with both striae and growthlines. perideltidial a.periderm n. [Gr. peri, around; derma, skin] (CNID: Hydrozoa)A hydroid perisarc.perienteric a. [Gr. peri, around; enteron, gut] Surrounding thealimentary tract.periflagellar membrane (PORIF) A membrane between choanocytecollar tentacles and the apical flagellum.perigastric a. [Gr. peri, around; gaster, stomach] Surroundingthe visera.perignathic girdle (ECHINOD: Echinoidea) A calcareous ridge

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