Cambrorhytium
Cambrorhytium |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Cnidaria |
Class: | Scyphozoa |
Clade: | †Conulariida |
Genus: | Cambrorhytium (Walcott 1908) Conway Morris and Robison, 1988[1] |
Species | |
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Cambrorhytium is an enigmatic fossil genus known from the Latham shale (California),[2] and the Chengjiang (China) and Burgess Shale (Canadian rockies) lagerstätte[3] 350 specimens of Cambrorhytium are known from the Greater Phyllopod bed, where they comprise 0.7% of the community.[4]
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.[2]
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] The other possible, but probably unlikely, affinity is with the hyolith molluscs.[2]
Its name is from the Latin rhytium, drinking horn.[1]
C. elongatum has been described to contain an alimentary canal in a single Chinese specimen.[6]
C. major was originally described as a member of the hyolith genus Orthotheca.[7]
C. fragilis was originally included by Charles D. Walcott in the genus Selkirkia,[8][9] – a taxonomy that was retained by later workers[10][11] until finally questioned[12] and redescribed[1] as Cambrorhytium in the eighties.
Its similarity with the lower cambrian species Torellelloides giganteum may indicate a close relationship.[1]
See also
Cambrorhytium has been compared to the fossil Archotuba[5] and Sphenothallus[13]
References
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External links
- Lua error in package.lua at line 80: module 'strict' not found.
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