羊角菊石
羊角菊石(學名:Crioceratites),又名公羊齒菊石,是生存於白堊紀的一屬菊石,生活在中等深度的大陸棚海域中。[2]其化石分佈於歐洲、非洲、亞洲和美洲。[1]
羊角菊石屬 化石時期:白堊紀
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羊角菊石的化石 | |
科學分類 | |
界: | 動物界 Animalia |
門: | 軟體動物門 Mollusca |
綱: | 頭足綱 Cephalopoda |
目: | †菊石目 Ammonitida |
亞目: | †勾菊石亞目 Ancyloceratina |
科: | †羊角菊石科 Crioceratitidae |
屬: | †羊角菊石屬 Crioceratites Léveillé, 1837[1] |
種 | |
見內文 | |
異名 | |
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特徵
羊角菊石的外殼盤捲得很鬆,外觀猶如盤曲的羊角,因而得名。其殼階互不相連。殼階的大小由內而外增長得很快。殼上飾有肋條,長有結節、較結實的粗肋條之間有二至三個無結節且較為纖細的肋條隔着。腹是圓形的。[2]
物種[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
參考文獻
- ^ 1.0 1.1 1.2 Fossilworks: Crioceratites. [2018-05-29]. (原始內容存檔於2021-03-24) (英語).
- ^ 2.0 2.1 Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 151. ISBN 0789489848.
外部連結
延伸閱讀
- 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.