{"id":2590,"date":"2013-11-22T17:03:17","date_gmt":"2013-11-22T22:03:17","guid":{"rendered":"http:\/\/www.ordovicianatlas.org\/?page_id=2590"},"modified":"2014-01-01T19:42:21","modified_gmt":"2014-01-02T00:42:21","slug":"atrypida","status":"publish","type":"page","link":"https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/rhynchonellata\/atrypida\/","title":{"rendered":"Atrypida"},"content":{"rendered":"<div align=\"left\">\n<div style=\"height: 250px;\" align=\"center\">\n<div style=\"border-right: 20px solid white; float: left; width: 250px;\"><img data-recalc-dims=\"1\" decoding=\"async\" alt=\"\" src=\"https:\/\/i0.wp.com\/www.ordovicianatlas.org\/wp-content\/uploads\/2013\/11\/Zygospira_modesta_250pxW.png?w=605&#038;ssl=1\" \/><\/div>\n<div style=\"float: left; width: 600px;\">\n<p align=\"left\"><strong>Classification<\/strong><br \/>\nPhylum: <a title=\"Brachiopoda\" href=\"https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/\"> Brachiopoda<\/a><br \/>\nClass: <a title=\"Rhynchonellata\" href=\"https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/rhynchonellata\/ \"> Rhynchonellata<\/a><br \/>\nOrder: Atrypida (Rzhonsnitskaya 1960)<br \/>\nCincinnatian Families: <a title=\"Anazygidae\" href=\"   https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/rhynchonellata\/atrypida\/anazygidae\/\"> Anazygidae<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Geologic Range<\/strong><br \/>\nOrdovician (Llandielo) &#8211; Upper Devonian (Frasnian).<\/p>\n<p><strong>Common Paleoecology<\/strong><br \/>\nAtrypida is an extinct order of stationary, epifaunal suspension feeders.\n<\/div>\n<p><strong>Characteristics of the Order<\/strong><\/p>\n<ul>\n<li>Impunctate, rarely fenestratev shell wall<\/li>\n<li>Biconvex or dorsibiconvex profile, usually rounded and astrophic<\/li>\n<li>Apical to transapical foramen<\/li>\n<li>Ventral adductors small with rounded dorsal adductors<\/li>\n<li>Small, bushy cardinal process<\/li>\n<li>Crura on inner socket ridges, laterally to dorsovartically directed<\/li>\n<li>Weak median septum<\/li>\n<\/ul>\n<div style=\"clear: both;\">[accordions title=&#8221;&#8221; disabled=&#8221;false&#8221; active=&#8221;1&#8243; autoheight=&#8221;false&#8221; collapsible=&#8221;true&#8221;] [accordion title=&#8221;Published Descriptions&#8221;]<br \/>\n<em>Treatise on Invertebrate Paleontology, Part H, Vol. 3 (2000)<\/em>:<\/p>\n<ul>\n<li>Shell wall impunctate, rarely fenestrate; macroornamentation ranging from smooth to ribbed to divaricate, lamellose, spinose, or fenestrate; microornamentation of primary layer usually absent, or with filae, capillae. Shell usually rounded, biconvex to dorsibiconvex, usually astrophic, less commonly flat, strophic; ventral valve rarely partly or wholly cemented; small, flat or rounded ventral area; foramen apical to transpical, dividing 2 triangular deltidial plates; pedicle callist or collar common, perhaps fused with overlying deltidial plates; ventral diductor muscle field large, usually incised, less commonly raised; ventral adductors small; dorsal adductors rounded, separated by weak median septum; small, bushy cardinal process normally located in cardinal pit; weak to prominent ventral vasculae branched around muscle field, saccate to lemniscate, weaker on dorsal valve; faint to strong gonadal pits flanking all muscle fields; crura arising from inner socket ridges, laterally to dorsovertically directed, merging into primary lamellae at sides of shell, may be feathered; medially to dorsally directed, conical spiralia, arising laterally, connected by simple jugum or jugal process, rarely ajugate.<\/li>\n<\/ul>\n<p>[\/accordion] [\/accordions]<\/p>\n<\/div>\n<div align=\"center\">\n<div style=\"height: 300px; width: 800px;\" align=\"center\">\n<div style=\"border-right: 15px solid white; float: left; width: 250px;\">\n<p align=\"center\">Anazygidae<\/p>\n<p><a href=\"https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/rhynchonellata\/atrypida\/anazygidae\/\"> <img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" alt=\"\" src=\"https:\/\/i0.wp.com\/www.ordovicianatlas.org\/wp-content\/uploads\/2013\/11\/Zygospira_modesta_250pxB.png?resize=250%2C250&#038;ssl=1\" width=\"250\" height=\"250\" \/><br \/>\n<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Classification Phylum: Brachiopoda Class: Rhynchonellata Order: Atrypida (Rzhonsnitskaya 1960) Cincinnatian Families: Anazygidae Geologic Range Ordovician (Llandielo) &#8211; Upper Devonian (Frasnian). Common Paleoecology Atrypida is an extinct order of stationary, epifaunal suspension feeders. Characteristics of the Order Impunctate, rarely fenestratev shell &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"more-link\" href=\"https:\/\/www.ordovicianatlas.org\/atlas\/brachiopoda\/rhynchonellata\/atrypida\/\"> <span class=\"screen-reader-text\">Atrypida<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":184,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"full-width-page.php","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-2590","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P3T22h-FM","_links":{"self":[{"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/pages\/2590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/comments?post=2590"}],"version-history":[{"count":7,"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/pages\/2590\/revisions"}],"predecessor-version":[{"id":4085,"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/pages\/2590\/revisions\/4085"}],"up":[{"embeddable":true,"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/pages\/184"}],"wp:attachment":[{"href":"https:\/\/www.ordovicianatlas.org\/wp-json\/wp\/v2\/media?parent=2590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}