- The
Estonioceratidae are a
family of
loosely coiled tarphycerids in
which the
inner side of the whorls,
which forms the dorsum, is
rounded or flat with...
-
Aphetoceras is a
genus of
tarphycerid cephalopod within the
Estonioceratidae;
loosely coiled without an
impression along the
dorsal margin;
early whorls...
- class:
Cephalopoda Subclass:
Nautiloidea Order: †Tarphycerida Family: †
Estonioceratidae Genus: †Estonioceras Noetling, 1883
Species Estonioceras imperfectum...
-
groups of families. They are: the
tarphyceratid group consisting of the
Estonioceratidae, Tarphyceratidae, Trocholitidae, and Ophidioceratidae; the barradeoceratid...
-
Aethoceras is a
genus of
Tarphycerida nautiloids included in the
family Estonioceratidae for
which the s**** is a
loosely coiled,
gradually expanding dextral...
- the uL
Ordovician of USA,
cross section similar to
Shumardoceras (
Estonioceratidae)
Genera known from
North America and
Europe Curtoceras:
Gradually expanded...
- layered.
Alaskcoceras belongs to the Tarphycerida, and to the
family Estonioceratidae. It was
found in Alaska. W.M
Furnish &
Brian F. Glenister, 1964....
- are
derived from B****leroceras or
possibly from some
member of the
Estonioceratidae.
Tarphyceratids vary in form and
siphuncle position. The siphuncle...
- and
tighter curvatures until becoming gyroconic, a
character of the
Estonioceratidae, a
family of
early tarphycerids. B****leroceras is
found widespread...
- siphuncle.
Campbelloceras may be
conceivably derived from
Estonioceras (
Estonioceratidae). The
cross section of
Campbelloceras and that of the
outer whorl of...
