Obinautilus
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| Obinautilus Fossil range: Oligocene – Pliocene |
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Fossil
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Obinautilus is an extinct genus of shelled octopods from the Late Oligocene to Late Miocene of Japan.[1]
Based on the examination of O. pulcher fossils from the Oligocene, the Tremoctopus-Argonauta divergence has been calculated to have occurred at least 29 million years ago.[2]
[edit] References
- ^ Saul, L. & C. Stadum (2005). "Fossil Argonauts (Mollusca: Cephalopoda: Octopodida) From Late Miocene Siltstones Of The Los Angeles Basin, California". Journal of Paleontology 79 (3): 520–531. doi:.
- ^ Strugnell, J., J. Jackson, A.J. Drummond & A. Cooper (2006). Divergence time estimates for major cephalopod groups: evidence from multiple genes. Cladistics 22 (1): 89-96.
[edit] Further reading
- Yanagisawa, Y. 1990. Age of fossil Argonautidae (Cephalopoda) from Hokuriku Province (central Honshu, Japan) based on diatom biostratigraphy.PDF (1.90 MiB) Bull. Geol. Surv. Japan 41 (3): 115-127.
