Conchostracan

Conchostracan

Conchostracans or clam shrimps are a family of bivalved branchiopod crustacea bearing passing resemblance but no relation to bivalved molluscs.cite journal
author = Webb, J.
year = 1979
title = A reappraisal of the palaeoecology of conchostracans (Crustacea: Branchiopoda)
volume = 158
issue = 2
pages = 259-275
] They are extant, and known from the fossil record, from at least the Devonian period and perhaps before.cite journal
author = Woolfe, K.J.
year = 1990
title = Trace fossils as paleoenvironmental indicators in the Taylor Group (Devonian) of Antarctica
journal = Palaeogeography, Palaeoclimatology, Palaeoecology
volume = 80
pages = 301-310
]

References


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Look at other dictionaries:

  • conchostracan carapace interspace — (ARTHROPODA: Crustacea) Any area between two growth lines of the conchostracan carapace; intervales; growth zone; growth band …   Dictionary of invertebrate zoology

  • conchostracan carapace interval — (ARTHROPODA: Crustacea) Any space between two ribs, costae, or costellae of the conchostracan carapace …   Dictionary of invertebrate zoology

  • conchostracan carapace interspace — Area between any 2 growth lines of conchostracan carapace. (Syn. used interchangeably include intervales, growth zone, growth band) [Moore and McCormick, 1969] …   Crustacea glossary

  • conchostracan carapace interval — Space between any 2 ribs, costae, or costellae on conchostracan carapace [Moore and McCormick, 1969] …   Crustacea glossary

  • conchostracan carapace ribs — Strong radial ridges radiating from and across umbo of conchostracan carapace, with intervals of variable width between any pair and commonly nodose at intersections of growth lines; may be partial or embryonic in expression; synonyms include… …   Crustacea glossary

  • conchostracan — con·chos·tra·can …   English syllables

  • conchostracan — noun see conchostraca …   Useful english dictionary

  • conchostracan carapace ribs — (ARTHROPODA: Crustacea) Strong radial ridges with intervals of variable width radiating from and across the umbo, usually nodose at intersections of growth lines …   Dictionary of invertebrate zoology

  • carinate — Conchostracan valve bearing rib(s), chiefly applicable to Leaiidae [Moore and McCormick, 1969]. Having a carina, keeled [Butler, T.H.]. (Order Diplostraca): Valve bearing rib(s) [McLaughlin, 1980]. (Order Isopoda): Having one or more carinae or… …   Crustacea glossary

  • cycladiformes — Conchostracan carapaces having dorsal margin of valves forming obtuse with posterior margin [Moore and McCormick, 1969]. (Order Diplostraca): Carapace with dorsal margin of valve forming obtuse angle with posterior margin [McLaughlin, 1980] …   Crustacea glossary

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