| 词条 | Tannuella |
| 释义 |
| fossil_range = {{Fossil range | Early Cambrian }} | taxon = Tannuella | authority = | subdivision_ranks = Species | subdivision = }} 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] References1. ^{{Cite journal | last1 = Kröger | first1 = B. R. | last2 = Vinther | first2 = J. | last3 = Fuchs | first3 = D. | doi = 10.1002/bies.201100001 | title = Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules | journal = BioEssays | volume = 33 | issue = 8 | pages = 602–613 | year = 2011 | pmid = 21681989| pmc = }} {{Taxonbar|from=Q16909179}}{{paleo-cephalopod-stub}}2. ^{{cite journal| author = Brock | first = G. A.| year = 2004| title = A New species of Tannuella (Helcionellida, Mollusca) from the Early Cambrian of South Australia| journal = Association of Australasian Palaeontologists Memoirs| volume = 30 | issue = | pages = 133–143| issn=0810-8889| hdl=1959.14/41429}} 5 : Helcionellidae|Prehistoric cephalopod genera|Cambrian molluscs|Paleozoic invertebrates of Oceania|Paleozoic animals of Asia |
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