-
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 s****. Peel, J. S. (1991). "Functional
Morphology of the
class Helcionelloida Nov., and the
Early Evolution of the Mollusca". In Simonetta, A. M.;...
- by Parkhaev,
helcionellids were
classified within the
separate class Helcionelloida or as "Uncertain
position (Gastropoda or Monoplacophora)"
within "Paleozoic...
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Gastropoda Scaphopoda Cephalopoda Archinacelloidea† Rostroconchia†
Helcionelloida†
Evolution of
Mollusca Kocot,
Kevin M.; Poustka,
Albert J.; Stöger,...
- Monoplacophora). For an
alternate 2007-2007
taxonomy by P. Yu.
Parkhae see
Helcionelloida.
Species in the
genus Yochelcionella include:
Yochelcionella americana...
-
Monoplacophoran Families". It has
become clear that the
fossil taxon Helcionelloida does not
belong to the
class Gastropoda; it is now a
separate class...
-
classification Domain:
Eukaryota Kingdom:
Animalia Phylum:
Mollusca class: †
Helcionelloida Order: †Helcionelliformes Family: †Helcionellidae Genus: †Tannuella...
- http://www.palaeos.com/Invertebrates/Molluscs/BasalMollusca/Conchifera/
Helcionelloida.html#exo-endo
Archived July 11, 2010, at the
Wayback Machine Bowman...
-
genus Latouc****a was
originally like this[citation needed]:
class Helcionelloida,
order Helcionellida,
superfamily Helcionelloidea,
family Helcionellidae...
