圓環貝屬
圓環貝屬（學名：）是Cyclothyrididae科圓窗貝亞科下已滅絕的一個屬，生存在白堊紀的海洋中。[2]
| 圆环贝属 化石时期：白堊紀 | |
|---|---|
科学分类  | |
| 界： | 动物界 Animalia |
| 门： | 腕足動物門 Brachiopoda |
| 纲： | 小嘴貝綱 Rhynchonellata |
| 目： | 小嘴貝目 Rhynchonellida |
| 科： | †圆环贝科 Cyclothyrididae |
| 亚科： | †圆环贝亚科 Cyclothyridinae |
| 属： | †圆环贝属 Cyclothyris M'Coy, 1844[1] |
| 種 | |
|
見內文 | |
特徵
這種腕足動物的體型相對較大，殼的外型寬闊，近三角形。牠們的嘴是直立的，並有一個大孔以便腳進出。兩瓣均突起，腳狀瓣上有一明顯的溝槽，而臂狀瓣上有摺皺。前部的連接線曲折不直，兩瓣上均有許多頂部線條分明的翅脈花紋。[2]
物種[1]
- Cyclothyris acuticostalis Smirnova & Konovalov, 1986
- Cyclothyris africana Owen, 1980
- Cyclothyris aliformis Smirnova, 2012
- Cyclothyris alikentica Smirnova, 2012
- Cyclothyris americana Cooper, 1955
- Cyclothyris astieriana d'Orbigny, 1847
- Cyclothyris burgemakensis Smirnova, 2012
- Cyclothyris compressa Valenciennes, 1819
- Cyclothyris dagestanica Smirnova, 2012
- Cyclothyris densleonis Anderson, 1902
- Cyclothyris difformis Valenciennes, 1819
- Cyclothyris formosa Owen, 1988
- Cyclothyris gibbsiana Sowerby, 1829
- Cyclothyris globata Arnaud, 1877
- Cyclothyris juigneti Owen, 1988
- Cyclothyris kennedyi Owen, 1980
- Cyclothyris lamarckiana d'Orbigny, 1849
- Cyclothyris larwoodi Owen, 1959
- Cyclothyris latissima Sowerby, 1829
- Cyclothyris punfieldensis Owen, 1988
- Cyclothyris subtrigonalis Imlay, 1937
- Cyclothyris sutchanensis Smirnova & Konovalov, 1986
- Cyclothyris tenuicostata Smirnova, 2012
- Cyclothyris ulaganica Makridin, 1964
- Cyclothyris vespertilio Brocchi, 1814
- Cyclothyris zudakharica Smirnova, 2012
參考文獻
- . [2018-01-24]. （原始内容存档于2016-03-23） （英语）.
- Walker, Cyril; Ward, David. . Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 84. ISBN 0789489848.
外部連結
- Cyclothyris in the Paleobiology Database
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