热门问题
时间线
聊天
视角
旋孔貝屬
来自维基百科，自由的百科全书
Remove ads
旋孔貝屬（學名：Cyclothyris）是旋孔貝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]
Remove ads
特徵
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
本屬包括以下物種：[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
Remove ads
參考文獻
外部連結
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads