Английская Википедия:Cambrorhytium
Шаблон:Short description Шаблон:Automatic taxobox
Cambrorhytium is an enigmatic fossil genus known from the Latham Shale (California),[1] and the Chengjiang (China) and Burgess Shale (Canadian rockies) lagerstätte.[2] 350 specimens of Cambrorhytium are known from the Greater Phyllopod bed, where they comprise 0.7% of the community.[3]
Etymology
Its name is from the Latin rhytium, drinking horn.[4]
Description
The fossil is conical, with iterated linear markings on its walls, parallel to its base. Its wall is thin, and it lacks the keel that is distinctive of hyoliths.[1]
It has been interpreted as a cnidarian polyp, with the interpretation suggesting that the animal lived in the tube and extended tentacles (of which no trace has been found) from the flat aperture.[5] This is supported by similarities to Palaeoconotuba.[6] The other possible, but probably unlikely, affinity is with the hyolith molluscs.[1]
Its similarity with the Lower Cambrian species Torellelloides giganteum may indicate a close relationship.[4] Cambrorhytium has also been compared to the fossil Archotuba[5] and Sphenothallus.[7]
C. elongatum has been described to contain an alimentary canal in a single Chinese specimen.[8]
Taxonomy
C. major was originally described as a member of the hyolith genus Orthotheca.[9]
C. fragilis was originally included by Charles D. Walcott in the genus Selkirkia,[10][11] – a taxonomy that was retained by later workers[12][13] until finally questioned[14] and redescribed[4] as Cambrorhytium in the eighties.
References
External links
Шаблон:Cambrian-animal-stub
Шаблон:Paleo-staurozoa-stub
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>; для сносокWaggoner2005не указан текст - ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 4,0 4,1 4,2 Ошибка цитирования Неверный тег
<ref>; для сносокSCM1988не указан текст - ↑ 5,0 5,1 Шаблон:Cite journalШаблон:Dead link
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокWalcott1908не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокWalcott1911не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокWalcott1912не указан текст - ↑ Шаблон:Cite journal
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокSCM1977не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокBriggs1986не указан текст
- Английская Википедия
- Burgess Shale fossils
- Staurozoa
- Burgess Shale animals
- Prehistoric cnidarian genera
- Controversial taxa
- Fossil taxa described in 1908
- Cambrian genus extinctions
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