median keel
(Order Notostraca):
Elevated, longitudinal keel along midline of carapace; extends anteriorly to transverse cervical groove [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • Median fins — Fin Fin, n.[OE. finne, fin, AS. finn; akin to D. vin, G. & Dan. finne, Sw. fena, L. pinna, penna, a wing, feather. Cf. {pen} a feather.] 1. (Zo[ o]l.) An organ of a fish, consisting of a membrane supported by rays, or little bony or cartilaginous …   The Collaborative International Dictionary of English

  • keel — n. [A.S. ceol, ship] 1. A prominent ridge or carina. 2. (BRYOZOA) a. In Stenolaemata, a flat median portion of the zooidal wall between sinuses in recumbent part of endozone or as a synonym of carina. b. In Phylactolaemata, a median longitudinal… …   Dictionary of invertebrate zoology

  • carina — A raised ridge on the surface of the exoskeleton [Ingle, 1980]. A ridge or keel of the exoskeleton (Fig. 1, 2). (Pl. carinae) [Perez Farfante and Kensley, 1997]. Any keel like structure, as on dorsum of pleon on some amphipods; in cirripeds,… …   Crustacea glossary

  • bird — birdless, adj. /berrd/, n. 1. any warm blooded vertebrate of the class Aves, having a body covered with feathers, forelimbs modified into wings, scaly legs, a beak, and no teeth, and bearing young in a hard shelled egg. 2. a fowl or game bird. 3 …   Universalium

  • Bird — /berrd/, n. Larry, born 1956, U.S. basketball player. * * * I Any of the warm blooded, beaked vertebrates of the class Aves, including more than 9,600 living species. A covering of feathers distinguishes birds from all other animals. Birds have a …   Universalium

  • carapace — ( ) [Baba, 2005]. Entire animal, right appendages omitted, dorsal view, based on Munida. [Baba, 2005] ( ) [Baba, 2005]. Carapace, spines, based on Munida. [Baba, 2005] Head Shield cuticular structure arising from posterior margin of cephalon,… …   Crustacea glossary

  • supraanal plate — Portion of notostracan telson, usually tongue shaped but may be spatulate to round; produced backward on dorsal side as a plate [Moore and McCormick, 1969]. (Order Notostraca): posteriorly directed median extension of telson. (simple, bilobed;… …   Crustacea glossary

  • labium — See: metastoma [Martin, 2005]. Flat, non segmented, bilobed structure situated posterior to the oral opening. (Syn. paragnath, lower lip) [Holdich and Jones, 1983]. Paired, laminar mouth parts immediately posterior to the mandibles [Mauchline,… …   Crustacea glossary

  • Pacific bonito — Taxobox name = Bonito regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Perciformes familia = Scombridae genus = Sarda species = S. chiliensis subspecies = S. c. lineolata trinomial = Sarda chiliensis lineolata trinomial… …   Wikipedia

  • Iolaea eucosmia — Scientific classification Kingdom: Animalia …   Wikipedia

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