圆环贝属
2018-06-25 20:16:20
 化石时期： 白垩纪 PreЄ
Є
O
S
D
C
P
T
J
K
E
N
|
||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 科学分类 | ||||||||||||||||
|
||||||||||||||||
| 种 | ||||||||||||||||
|
见内文 |
圆环贝属（学名：Cyclothyris）是Cyclothyrididae科圆窗贝亚科下已灭绝的一个属，生存在白垩纪的海洋中。2
目录
- 1 特征
- 2 物种1
- 3 参考文献
- 4 外部链接
特征
这种腕足动物的体型相对较大，壳的外型宽阔，近三角形。它们的嘴是直立的，并有一个大孔以便脚进出。两瓣均突起，脚状瓣上有一明显的沟槽，而臂状瓣上有折皱。前部的连接线曲折不直，两瓣上均有许多顶部线条分明的翅脉花纹。2
物种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
参考文献
- ^ 1.0 1.1 Fossilworks: Cyclothyris. 2018-01-24 （英语）.
- ^ 2.0 2.1 Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 84. ISBN 0789489848.
外部链接
- Cyclothyris in the Paleobiology Database