{"id":2822,"date":"2013-12-03T16:01:06","date_gmt":"2013-12-03T21:01:06","guid":{"rendered":"http:\/\/www.ordovicianatlas.org\/?page_id=2822"},"modified":"2016-10-10T12:54:13","modified_gmt":"2016-10-10T16:54:13","slug":"strophomena","status":"publish","type":"page","link":"https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/strophomenata\/strophomenida\/strophomenidae\/strophomena\/","title":{"rendered":"Strophomena<\/em>"},"content":{"rendered":"
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Classification<\/strong>
\nPhylum: Brachiopoda<\/a>
\nClass: Strophomenata<\/a>
\nOrder: Strophomenida<\/a>
\nFamily: Strophomenidae <\/a>
\nGenus: Strophomena<\/em> Rafinesque, 1824
\nCincinnatian Species: Strophomena nutans<\/a><\/em>, Strophomena concordensis<\/em><\/a>, Strophomena vetusta<\/a><\/em>
\n Strophomena planumbona <\/a><\/em>, Strophomena planoconvexa<\/a><\/em><\/p>\n<\/div>\n

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[accordions title=”” disabled=”false” active=”1″ autoheight=”false” collapsible=”true”] [accordion title=”Taxonomic Details”]
\nType species<\/strong>: Leptaena planumbona<\/em> Hall, 1847 (Jin et al., 1997; Jin & Zhan, 2001)
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Geologic Range<\/strong>
\nOrdovician (Caradoc \u2013 Ashgill)<\/p>\n

Common Paleoecology<\/strong>
\nStrophomena<\/em> is a genus of extinct stationary epifaunal suspension feeders<\/p>\n

Identification in Hand Sample<\/strong>:<\/p>\n

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  • Medium to large size<\/li>\n
  • semicircular outline<\/li>\n
  • Fine ribs radiate from umbones of both valves toward commisure<\/li>\n
  • Strong teeth<\/li>\n
  • If a triangular calcareous plate, the symphytium, can be distinguished along the flat interarea of the concave (ventral) valve, then the specimen is Strophomena<\/em>, not Rafinesquina<\/em>.<\/li>\n
  • Squatter and more triangular cardinal process lobes<\/li>\n
  • Changes convexity along profile<\/li>\n<\/ul>\n<\/div>\n
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    Geographic Occurrences<\/strong><\/p>\n

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