Yochelcionelloidea Temporal range: Lower Cambrian–Mid Cambrian |
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Yochelcionella cyrano | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
(unranked): | incertae sedis |
Class: | †Helcionelloida |
Order: | †Helcionelliformes |
Superfamily: |
†Yochelcionelloidea Runnegar & Jell, 1976 |
Yochelcionelloidea is an extinct superfamily of paleozoic molluscs of uncertain position (Gastropoda or Monoplacophora). The earliest yochelcionellids are known from the Middle Tommotian, but they are most diverse from the Botomian through the early Middle Cambrian.
The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005:
Yochelcionelloidea
According to the opinion of P. Yu. Parkhaev is in the class Helcionelloida, subclass Archaeobranchia Parkhaev, 2001, Order Helcionelliformes Golikov & Starobogatov, 1975: