Strepsodiscus
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Strepsodiscus is a very primitive snail-like mollusc from the Early Late Cambrian (Dresbachian Age) of North America. The coiled, slightly asymmetrical shell is about 3 cm in height. Knight, et al., 1960 include it within the Cyrtolitidae, a paraphyletic or polyphyletic assemblage of proto-Gastropods and Tergomyan molluscs. Strepsodiscus may be too primitive to be a true gastropod.
[edit] References
- Knight, J. B., Cox, L. R., Keen, A. M., Batten, R. L., Yochelson, E. L., and Robertson, R. (1960). Systematic descriptions (Archaeogastropoda). In Moore, R. C. (ed.) Treatise on Invertebrate Paleontology. Part I. Mollusca 1, pp. 169-310. Geological Society of America and Kansas University Press, Colorado and Kansas.
- Wagner, P. J. (1999). Phylogenetics of the earliest anisostrophically coiled gastropods. Smithsonian Contributions to Paleobiology 88: 1 - 132.
[edit] External links
- Strepsodiscus - Palaeos
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