- hinge margin
- (Class Ostracoda):In valve, dorsal margin adjoining hinge (as opposed to free = anterior, ventral, and posterior margins) [Stachowitsch, 1992].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.
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hinge — (Class Ostracoda): Complementary interlocking articulatory structures on inner dorsal margin of valves. See: ADont hinge, merodont hinge, lophodont hinge, pentodont hinge, holomerodont hinge, antimerodont hinge, entomodont hinge, gongylodont… … Crustacea glossary
margin — (Class Ostracoda): Entire margin of carapace (or valve) when viewed from the side. Free margin refers to margin of carapace not held together by hinge (i.e., anteriorly, ventrally, posteriorly), while contact margin is restricted to that part of… … Crustacea glossary
hinge selvage — (Class Ostracoda): In dorsal margin (hinge area) of valve; ridge like elevation corresponding and occasionally continuous with selvage of anterior, ventral, and posterior margins) [Stachowitsch, 1992] … Crustacea glossary
hinge selvage — ARTHROPODA: Crustacea) In Ostracoda, a single ridge extending along the free margin of the carapace, when valves are closed, fitting into the selvage groove of the opposite valve; keeps valves from slipping sideways across each other … Dictionary of invertebrate zoology
hinge teeth — 1. (BRACHIOPODA) The tooth part of the articulating device on the ventral valve in the form of small projections along the free edge of the palintrope. 2. (MOLLUSCA: Bivalvia) A series of shelly structures near the dorsal margin and fitting into… … Dictionary of invertebrate zoology
free margin — (Class Ostracoda): All parts of margin except hingement [McLaughlin, 1980]. (Class Ostracoda): Margin [Stachowitsch, 1992]. (Class Ostracoda): The perimeter of the valves (exclusive of the hinge region) where valves are in contact [Cohen,… … Crustacea glossary
orthodont hinge — (MOLLUSCA: Bivalvia) A hinge in which the teeth approximate the direction of the cardinal margin … Dictionary of invertebrate zoology
Ochlockonee moccasinshell — Medionidus simpsonianus from the original description of the species by Walker, 1905 Conservation status … Wikipedia
tooth — (Order Decapoda): Tooth like structure, either in gastric mill of cardiac stomach or referring to blunt, relatively broad projection on outer surface of carapace. In cardiac stomach, one may distinguish one median and two lateral teeth. On… … Crustacea glossary
socket — (Subclass Branchiura): On third pair of thoracic appendages (thoracopods) of male, socket like depression in protopod. Receives peg of fourth thoracopod in a peg and socket arrangement and serves to hold both thoracopods together during… … Crustacea glossary