羊角菊石
羊角菊石(学名:Crioceratites),又名公羊齿菊石,是生存于白垩纪的一属菊石,生活在中等深度的大陆棚海域中。[2]其化石分布于欧洲、非洲、亚洲和美洲。[1]
羊角菊石属 化石时期:白垩纪
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羊角菊石的化石 | |
科学分类 | |
界: | 动物界 Animalia |
门: | 软体动物门 Mollusca |
纲: | 头足纲 Cephalopoda |
目: | †菊石目 Ammonitida |
亚目: | †勾菊石亚目 Ancyloceratina |
科: | †羊角菊石科 Crioceratitidae |
属: | †羊角菊石属 Crioceratites Léveillé, 1837[1] |
种 | |
见内文 | |
异名 | |
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特征
羊角菊石的外壳盘卷得很松,外观犹如盘曲的羊角,因而得名。其壳阶互不相连。壳阶的大小由内而外增长得很快。壳上饰有肋条,长有结节、较结实的粗肋条之间有二至三个无结节且较为纤细的肋条隔著。腹是圆形的。[2]
物种[1]
- Crioceras (Acanthodiscus)
- Crioceras dilatatum
- Crioceras munieri
- Crioceras obliquatum
- Crioceras simplex
- Crioceratites (Crioceratites)
- Crioceratites (Emericiceras)
- Crioceratites andersoni
- Crioceratites barrabei
- Crioceratites bituberculatus
- Crioceratites coniferus
- Crioceratites duvalii
- Crioceratites emerici
- Crioceratites heterocostatus
- Crioceratites krenkeli
- Crioceratites latus
- Crioceratites leivaensis
- Crioceratites loryi
- Crioceratites panescorsii
- Crioceratites portarum
- Crioceratites tehamaensis
- Crioceratites tener
- Crioceratites yollabollium
参考文献
- ^ 1.0 1.1 1.2 Fossilworks: Crioceratites. [2018-05-29]. (原始内容存档于2021-03-24) (英语).
- ^ 2.0 2.1 Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 151. ISBN 0789489848.
外部链接
延伸阅读
- Simon & Schuster's Guide To Fossils (Nature Guide Series) by Paolo Arduini
- Treatise on Invertebrate Paleontology, Part L, Ammonoidea,--Ancyloceratiaceae; Geological Society of America 1957, reprinted 1990.