Mackinnonia
Extinct genus of molluscs
Mackinnonia Temporal range: Late Early Cambrian[1] PreꞒ Ꞓ O S D C P T J K Pg N | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | †Helcionelloida |
Order: | †Helcionelliformes |
Family: | †Helcionellidae |
Genus: | †Mackinnonia Runnegar 1980 |
Species | |
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Mackinnonia is a genus of small shelly fossil comprising straight or slightly coiled shells of the helcionelloid type.[1] The outer surface of their shell is smooth, whereas the inner surface has a net-like ridges.[1] They are known from late Early Cambrian rocks across North America and Greenland.[1]
References
- ^ a b c d Christian B. Skovsted; John S. Peel (2007). "Small shelly fossils from the argillaceous facies of the Lower Cambrian Forteau Formation of western Newfoundland". Acta Palaeontologica Polonica. 52 (4): 729–748.
- Fossil Focus: The place of small shelly fossils in the Cambrian explosion
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