Rank Superfamily | Order †Helcionelliformes | |
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Similar Yochelcionella, Aldanellidae, Helcionelloida, Cycloneritimorpha | ||
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.
Contents
2005 taxonomy
The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005:
Yochelcionelloidea
2006-2007 taxonomy
According to the opinion of P. Yu. Parkhaev is in the class Helcionelloida, subclass Archaeobranchia Parkhaev, 2001, Order Helcionelliformes Golikov & Starobogatov, 1975:
References
Yochelcionelloidea Wikipedia(Text) CC BY-SA