- & Starobogatov, 1975
Superfamily Helcionelloidea Wenz, 1938
Family Helcionellidae Wenz, 1938
Family Carinopeltidae Parkhaev, 2013 (syn "Igarkiellidae"...
-
Helcionellacea includes two
families according to the Treatise, 1960, the
Helcionellidae,
which is the more primitive, and the Coreospiridae,
which is the more...
- & Starobogatov, 1975
Superfamily Helcionelloidea Wenz, 1938
Family Helcionellidae Wenz, 1938
Family Igarkiellidae Parkhaev, 2001
Family Coreospiridae...
- "endogastric" in shape.
Helcionella is the type
genus of the
family Helcionellidae. Cobbold, E. S. (1919). "I.—Cambrian Hyolithidæ, etc., from Hartshill...
- s****, that are
limited to the
Cambrian Period. Two
small families, the
Helcionellidae and
Coreospiridae are included. The Bellerophontacea,
which range from...
- Helcionelloida,
order Helcionellida,
superfamily Helcionelloidea,
family Helcionellidae. The
taxonomy of the
Gastropoda by
Bouchet & Rocroi, 2005 categorizes...
-
interpreted as
ancestral to the rostroconchs, and has been
aligned to the
Helcionellidae. The
genus is
closely related to Watsonella, with
which it
bears many...
-
classification Domain:
Eukaryota Kingdom:
Animalia Phylum:
Mollusca class: †Helcionelloida Order: †Helcionelliformes Family: †
Helcionellidae Genus: †Tannuella...
-
Formation Greenland United
States ( Idaho) A
member of the
family Helcionellidae. The type
species is "Helcionella"
aequa Resser (1939);
genus also includes...
-
Mollusca class: †Helcionelloida Order: †Helcionelliformes Family: †
Helcionellidae Genus: †Mackinnonia
Runnegar 1980
Species M.
taconica (Landing & Bartovski...
