-
Helcionelloida is an
extinct group of
ancient molluscs (phylum Mollusca).
These are the
oldest known conchiferan molluscs, that is, they had a mineralised...
-
exogastric s****. Peel, J. S. (1991). "Functional
Morphology of the
class Helcionelloida Nov., and the
Early Evolution of the Mollusca". In Simonetta, A. M.;...
-
Monoplacophora (non-monophyletic)
Cephalopoda Scaphopoda Rostroconchia †
Helcionelloida †
Gastropoda Bivalvia Diversity 85,000
recognized living species....
- by Parkhaev,
helcionellids were
classified within the
separate class Helcionelloida or as "Uncertain
position (Gastropoda or Monoplacophora)"
within "Paleozoic...
-
Gastropoda Scaphopoda Cephalopoda Archinacelloidea† Rostroconchia†
Helcionelloida†
Evolution of
Mollusca Kocot,
Kevin M.; Poustka,
Albert J.; Stöger,...
-
genus Latouc****a was
originally like this[citation needed]:
class Helcionelloida,
order Helcionellida,
superfamily Helcionelloidea,
family Helcionellidae...
-
Monoplacophoran Families". It has
become clear that the
fossil taxon Helcionelloida does not
belong to the
class Gastropoda; it is now a
separate class...
- http://www.palaeos.com/Invertebrates/Molluscs/BasalMollusca/Conchifera/
Helcionelloida.html#exo-endo
Archived July 11, 2010, at the
Wayback Machine Bowman...
- Monoplacophora). For an
alternate 2007-2007
taxonomy by P. Yu.
Parkhae see
Helcionelloida.
Species in the
genus Yochelcionella include:
Yochelcionella americana...
- S2CID 128682549. Peel, J. S. (1991). "Functional
Morphology of the
class Helcionelloida Nov., and the
Early Evolution of the Mollusca". In Simonetta, A. M.;...
