Mackinnonia

Mackinnonia
Temporal range: Late Early Cambrian[1]
Scientific classification
Kingdom:Animalia
Phylum:Mollusca (?)
Class:†Helcionelloida
Order:†Helcionelliformes
Family:†Helcionellidae
Genus:†Mackinnonia
Runnegar 1980
Species
  • M. taconica (Landing & Bartovski 1996) Skovsted & Peel 2007
  • M. rostratum Zhou & Xiao 1984 (type)

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

  1. 1 2 3 4 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.


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