Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised...
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Monoplacophora (non-monophyletic) Cephalopoda Scaphopoda Rostroconchia † Helcionelloida † Gastropoda Bivalvia Diversity 85,000 recognized living species....
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exogastric shell. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
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Animalia Phylum: Mollusca Class: Gastropoda Cuvier, 1795 Subclasses Helcionelloida Caenogastropoda Heterobranchia Neomphaliones Neritimorpha Patellogastropoda...
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Helcionellid (category Helcionelloida)
by Parkhaev, helcionellids were classified within the separate class Helcionelloida or as "Uncertain position (Gastropoda or Monoplacophora)" within "Paleozoic...
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Monoplacophora). For an alternate 2007-2007 taxonomy by P. Yu. Parkhae see Helcionelloida. Species in the genus Yochelcionella include: Yochelcionella americana...
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Gastropoda Scaphopoda Cephalopoda Archinacelloidea† Rostroconchia† Helcionelloida† Evolution of Mollusca Kocot, Kevin M.; Poustka, Albert J.; Stöger,...
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genus Latouchella was originally like this[citation needed]: class Helcionelloida, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae...
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Monoplacophoran Families". It has become clear that the fossil taxon Helcionelloida does not belong to the class Gastropoda; it is now a separate class...
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http://www.palaeos.com/Invertebrates/Molluscs/BasalMollusca/Conchifera/Helcionelloida.html#exo-endo Archived July 11, 2010, at the Wayback Machine Bowman...
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Protowenella. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
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enigmatic, and has been placed in a number of different groups (Gastropoda, Helcionelloida, or Monoplacophora). This mollusk is common in the shale, where they...
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S2CID 128682549. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
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classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca Class: †Helcionelloida Order: †Helcionelliformes Family: †Helcionellidae Genus: †Tannuella...
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superfamily of paleozoic molluscs of uncertain position (Gastropoda, Helcionelloida, or Monoplacophora). Based on the taxonomy of the Gastropoda by Bouchet...
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stem-group Lophotrochozoa Hyolitha Qingjianglepas Q. elegans Mollusca Helcionelloida "Limpet-formed shell, flattened, with elliptical aperture. Radial sculpture...
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Pelagiellidae (category Helcionelloida)
1985 within the subclass Archaeobranchia Parkhaev, 2001, in the class Helcionelloida Peel, 1991. Genera in the family Pelagiellidae include: Pelagiella Matthew...
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Khairkhaniidae (category Helcionelloida)
the order Khairkhaniifomes within the subclass Divasibranchia. Class Helcionelloida Subclass Divasibranchia Minichev & Starobogatov, 1975 Order Khairkhaniifomes...
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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.;...
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Tichkaella. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
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Trenella (category Helcionelloida)
Starobogatov, 1975, subclass Archaeobranchia Parkhaev, 2001, class Helcionelloida Peel, 1991. Genera in the family Trenellidae include: Trenella Parkhaev...
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A.; Skovsted, C.; Peel, J. (2004). "Anabarella australis (Mollusca, Helcionelloida) from the Lower Cambrian of Greenland". Geobios. 37 (6): 719–724. doi:10...
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Barskovia (category Helcionelloida)
classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca Class: †Helcionelloida Order: †Khairkhaniiformes Family: †Khairkhaniidae Genus: †Barskovia...
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Carinopelta (category Helcionelloida)
1975 within the subclass Archaeobranchia Parkhaev, 2001 in the class Helcionelloida Peel, 1991. Carinopelta is one of six genera which was placed into the...
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classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca Class: †Helcionelloida Order: †Helcionelliformes Family: †Helcionellidae Genus: †Totoralia...
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Latouchella. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
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Lamaureriella (category Helcionelloida)
classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca Class: †Helcionelloida Order: †Helcionelliformes Family: †Helcionellidae Genus: †Lamaureriella...
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Yochelcionelloidea (category Helcionelloida)
Trenellidae According to the opinion of P. Yu. Parkhaev is in the class Helcionelloida, subclass Archaeobranchia Parkhaev, 2001, Order Helcionelliformes Golikov...
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fossil shells. Peel, J. S. (1991). "Functional Morphology of the Class Helcionelloida Nov., and the Early Evolution of the Mollusca". In Simonetta, A. M.;...
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classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca Class: †Helcionelloida Order: †Helcionelliformes Family: †Helcionellidae Genus: †Mackinnonia...
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