Tannuella
| Tannuella Temporal range: Early Cambrian | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| (unranked): | incertae sedis |
| Class: | †Helcionelloida |
| Order: | †Helcionelliformes |
| Family: | †Helcionellidae |
| Genus: | †Tannuella |
Tannuella is a genus of helcionellids known from Lower Cambrian strata.
It has a high, septate shell similar to that of hypseloconids such as Knightoconus . These genera were once considered ancestral cephalopods,[1] but are more broadly assigned to the helconellids (or putatively the tergomyans); i.e. "Cambrian monoplacophora".[2]
References
- ↑ Kröger, B. R.; Vinther, J.; Fuchs, D. (2011). "Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules". BioEssays. 33 (8): 602–613. doi:10.1002/bies.201100001. PMID 21681989.
- ↑ Brock, G. A. (2004). "A New species of Tannuella (Helcionellida, Mollusca) from the Early Cambrian of South Australia". Association of Australasian Palaeontologists Memoirs. 30: 133–143. ISSN 0810-8889. hdl:1959.14/41429.
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