圆柱箭石
圆柱箭石属![]() 早 | |
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科学分类 ![]() | |
界: | 动物界 Animalia |
门: | 软体动物门 Mollusca |
纲: | 头足纲 Cephalopoda |
目: | †箭石目 Belemnitida |
科: | †箭石科 Belemnitidae |
亚科: | †圆柱箭石亚科 Cylindroteuthinae |
属: | †圆柱箭石属 Cylindroteuthis Bayle, 1879[1] |
种 | |
Cylindroteuthis cuspidata |
圆柱箭石(学名:Cylindroteuthis)是生存于早侏罗纪至早白垩纪的一属箭石,生活在较深的大陆棚海域中,为肉食性动物。牠们是体型最大的箭石之一,其长度能长到25公分。[2]其化石分布于旧苏联地区、墨西哥、瑞士和美国等地。[3]
特征
圆柱箭石的鞘很长,呈圆柱状,因而得名。鞘末段呈锥状缩小至尖端。[2]
物种[3]
- Cylindroteuthis cuspidata Sachs & Nalnjaeva, 1964
- Cylindroteuthis jacutica Sachs & Nalnjaeva, 1964
- Cylindroteuthis puzosi d'Orbigny, 1842
参考文献
- ^ Scudder, Samuel Hubbard. Nomenclator zoologicus: An alphabetical list of all generic names that have been employed by naturalists for recent and fossil animals from the earliest times to the close of the year 1879 (Google eBook). Washington: Government printing office. 1882: 96 [February 18, 2012].
- ^ 2.0 2.1 Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 163. ISBN 0789489848.
- ^ 3.0 3.1 Fossilworks: Cylindroteuthis. [2018-06-14]. (原始内容存档于2020-01-10) (英语).
外部链接
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