Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.[1]
^Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.; Conway Morris, S (eds.). The Early Evolution of Metazoa and the Significance of Problematic Taxa. Cambridge University Press. pp. 157–177. ISBN 978-0-521-40242-2.
Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised...
Gastropoda Scaphopoda Cephalopoda Archinacelloidea† Rostroconchia† Helcionelloida† Evolution of Mollusca Sigwart, Julia D.; Sutton, Mark D. (October 27...
by Parkhaev, helcionellids were classified within the separate class Helcionelloida or as "Uncertain position (Gastropoda or Monoplacophora)" within "Paleozoic...
exogastric shell. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
Monoplacophoran Families". It has become clear that the fossil taxon Helcionelloida does not belong to the class Gastropoda; it is now a separate class...
Monoplacophora). For an alternate 2007-2007 taxonomy by P. Yu. Parkhae see Helcionelloida. Species in the genus Yochelcionella include: Yochelcionella americana...
genus Latouchella was originally like this[citation needed]: class Helcionelloida, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae...
superfamily of paleozoic molluscs of uncertain position (Gastropoda, Helcionelloida, or Monoplacophora). Based on the taxonomy of the Gastropoda by Bouchet...
http://www.palaeos.com/Invertebrates/Molluscs/BasalMollusca/Conchifera/Helcionelloida.html#exo-endo Archived July 11, 2010, at the Wayback Machine Bowman...
enigmatic, and has been placed in a number of different groups (Gastropoda, Helcionelloida, or Monoplacophora). This mollusk is common in the shale, where they...
Protowenella. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
S2CID 128682549. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
the order Khairkhaniifomes within the subclass Divasibranchia. Class Helcionelloida Subclass Divasibranchia Minichev & Starobogatov, 1975 Order Khairkhaniifomes...
Trenellidae According to the opinion of P. Yu. Parkhaev is in the class Helcionelloida, subclass Archaeobranchia Parkhaev, 2001, Order Helcionelliformes Golikov...
1975 within the subclass Archaeobranchia Parkhaev, 2001 in the class Helcionelloida Peel, 1991. Carinopelta is one of six genera which was placed into the...
Starobogatov, 1975, subclass Archaeobranchia Parkhaev, 2001, class Helcionelloida Peel, 1991. Genera in the family Trenellidae include: Trenella Parkhaev...
uncertain position taxonomically. They might be snails (Gastropoda), Helcionelloida, or they might be Monoplacophora. The taxonomy of the Gastropoda by...
1985 within the subclass Archaeobranchia Parkhaev, 2001, in the class Helcionelloida Peel, 1991. Genera in the family Pelagiellidae include: Pelagiella Matthew...
2008-07-30. Peel, J.S. (1991). "Functional morphology of the Class Helcionelloida nov., and the early evolution of the Mollusca". In Simonetta, A.M.;...
Latouchella. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
Tichkaella. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
Jacquet, Jago & Brock Cambrian Heatherdale Shale Australia A member of Helcionelloida, possibly a helcionellid. The type species is T. amygdala. ‘Unio’ asturianus...
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