- The
Tarphyceratidae are
tightly coiled,
evolute Tarphycerida with
ventral siphuncles. The
dorsum is
characteristically impressed where the
whorl presses...
- They are: the
tarphyceratid group consisting of the Estonioceratidae,
Tarphyceratidae, Trocholitidae, and Ophidioceratidae; the
barradeoceratid group, derived...
- Kingdom:
Animalia Phylum:
Mollusca class:
Cephalopoda Subclass:
Nautiloidea Order: †Tarphycerida Family: †
Tarphyceratidae Genus: †Tarphyceras Hyatt, 1894...
- with the
Tarphyceratidae, but in
which the siphuncle,
similar in structure,
becomes dorsal. The
Trocholitidae are
derived from the
Tarphyceratidae, perhaps...
- Phylum:
Mollusca class:
Cephalopoda Subclass:
Nautiloidea Order: †Tarphycerida Family: †
Tarphyceratidae Genus: †Campbelloceras
Ulrich and Foerste, 1936...
-
between the
ancestral B****leroceratidae and the more
tightly coiled Tarphyceratidae. Flower, R. H. 1976.
Ordovician Cephalopod Faunas and
Their Role in...
-
Tarphycerida as a
suborder (Teichert 1988).
Derivation is from the
Tarphyceratidae. In
early forms the
siphuncle is
central or subcentral, orthochoanitic...
-
Ordovician (Floian)
Valhallfonna Formation Norway A
member of the
family Tarphyceratidae.
Cyclostomiceras profilstrandense Sp. nov
Valid Kröger &
Pohle Ordovician...
- and its
contemporary Barrandeoceras are both
likely derived from the
Tarphyceratidae;
Plectoceras with its
subventral siphuncle possibly from Campbelloceras...
