Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 91articular sclerite (ARTHRO: Insecta) A sclerite between an insectbody and its appendage.Articulata n. [L. articulus, joint] 1. (BRACHIO) A class of thePhylum Brachiopoda, having the valves articulated by teethon the ventral (pedicle) valve and sockets on the dorsal(brachial) valve. 2. (BRYO) A division of Bryozoa containingtubular bryozoans in which colonies are erect, branchedand attached by rhizoids. 3. (ECHINOD) A subclass of echinodermatancrinoids comprising sea lilies and feather stars.articulate a. [L. articulare, to divide] Jointed; formed of segments;connected by a joint.articulated apex see clasp filamentarticulate fascia A band of contiguous spots.articulation n. [L. articulare, to divide] A movable point ofcontact between two sclerotic parts of a structure.artifact, artefact n. [L. ars, art; facere, to make] An appearance,or structure, produced by preparation of materialthat was not present in the original material before themanipulation.artificial classification A classification based on convenientand conspicuous diagnostic characters, ignoring charactersindicating relationship; often a classification based on asingle character instead of an evaluation of all of the characters.see classification, phylogeny.ascaridin, ascaridine n. [Gr. askaris, an intestinal worm](NEMATA) A protein in the sperm.ascarylic acid Material making up the refringent bodies orcrystalloids in the oocytes of nematodes, that presumablyform the vitelline membrane of the egg.Aschelminthes, aschelminths n.pl. [Gr. askos, bag; helmins,worm] A taxon (phylum) of the animal kingdom, when recognized,that includes the (classes) Rotifera, Gastrotricha,Kinorhyncha or Echinodera, Nematomorpha or Gordiacea,and Nemata (=Nematoda).ascon n. [Gr. askos, bag] (PORIF) 1. A simple sponge with unfoldedpinacoderm and choanoderm. 2. Sometimes used todescribe the small, simple, most primitive sponge Leu-