-
Helcionelloida is an
extinct group of
ancient molluscs (phylum Mollusca).
These are the
oldest known conchiferan molluscs, that is, they had a mineralised...
- Rostroconchia† fossils;
probable ancestors of
bivalves extinct marine Helcionelloida† fossils; snail-like
molluscs such as Latouc****a
extinct marine Cricoconarida†...
-
Gastropoda Scaphopoda Cephalopoda Archinacelloidea† Rostroconchia†
Helcionelloida†
Evolution of
Mollusca Sigwart,
Julia D.; Sutton, Mark D. (October 27...
-
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). For an
alternate 2007-2007
taxonomy by P. Yu.
Parkhae see
Helcionelloida.
Species in the
genus Yochelcionella include:
Yochelcionella americana...
- by Parkhaev,
helcionellids were
classified within the
separate class Helcionelloida or as "Uncertain
position (Gastropoda or Monoplacophora)"
within "Paleozoic...
-
Monoplacophoran Families". It has
become clear that the
fossil taxon Helcionelloida does not
belong to the
class Gastropoda; it is now a
separate class...
-
genus Latouc****a was
originally like this[citation needed]:
class Helcionelloida,
order Helcionellida,
superfamily Helcionelloidea,
family Helcionellidae...
-
classification Domain:
Eukaryota Kingdom:
Animalia Phylum:
Mollusca class: †
Helcionelloida Order: †Helcionelliformes Family: †Helcionellidae Genus: †Tannuella...
- Protowenella. Peel, J. S. (1991). "Functional
Morphology of the
class Helcionelloida Nov., and the
Early Evolution of the Mollusca". In Simonetta, A. M.;...
