旋孔貝屬
外观
旋孔贝属 化石时期:
| |
---|---|
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: | †旋孔贝科 Cyclothyrididae |
亚科: | †旋孔贝亚科 Cyclothyridinae |
属: | †旋孔贝属 Cyclothyris M'Coy, 1844[1] |
種 | |
見內文 |
旋孔貝屬(學名:Cyclothyris)是旋孔贝科旋孔貝亞科下已滅絕的一個屬,生存在白堊紀的海洋中。[2]
特徵
[编辑]這種腕足動物的殼形大而獨特,近似寬闊的三角形。喙是直立的,並有一供肉莖進出的孔。兩殼均突起,腹殼上有一明顯的溝槽,而背殼上有褶皺。兩殼前緣的閉合線曲折不直,兩殼上均有許多線條分明的肋紋。[2]
物種
[编辑]本属包括以下物种:[1]
- Cyclothyris acuticostalis Smirnova & Konovalov, 1986
- 非洲旋孔貝 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
[编辑]- ^ 1.0 1.1 Fossilworks: Cyclothyris. [2018-01-24]. (原始内容存档于2016-03-23) (英语).
- ^ 2.0 2.1 Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 84. ISBN 0789489848.
外部連結
[编辑]- Cyclothyris in the Paleobiology Database