Yochelcionelloidea Explained

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.^[1]

2005 taxonomy

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005:

Yochelcionelloidea

• † Yochelcionellidae
• † Stenothecidae
• † Trenellidae

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:^{[2] [3]}

• Superfamily Yochelcionelloidea Runnegar & Jell, 1976

• Family Trenellidae Parkhaev, 2001

• Family Yochelcionellidae Runnegar & Jell, 1976

• Family Stenothecidae Runnegar & Jell, 1980

• Subfamily Stenothecinae Runnegar & Jell, 1980

• Subfamily Watsonellinae Parkhaev, 2001

Notes and References

1. Pavel Yu. Parkhaev (2008). "The Early Cambrian Radiation of Mollusca." In: "Phylogeny and evolution of the Mollusca." Edited by: Ponder WF, Lindberg DR. Berkeley: University of California Press: 33-69.
2. P. Yu. Parkhaev (2006) "Adaptive radiation of the Cambrian helcionelloid mollusks (Gastropoda, Archaeobranchia). " In: S.V. Rozhnov (ed.) "Evolution of the biosphere and biodiversity. Towards the 70th anniversary of A. Y. Rozanov". 2006. Moscow, pp. 282-296.
3. P. Yu. Parkhaev (2007) "The Cambrian ‘basement’ of gastropod evolution". In: Vickers-Rich, P. & Komarower, P. (eds.) "The Rise and Fall of the Ediacaran Biota", Special publications, 286, London: Geological Society, pp. 415–421.