-
Intermediate between serpenticones and
oxycones:
narrow and
moderately involute.
Discocone –
Intermediate between oxycones and spherocones:
involute and moderately...
- in Germany, Poland, and Israel.
Beneckeia s**** are
compressed smooth oxycones,
involute with
sharp venters.
Sutures are
multilobed with
small adventitious...
-
Lower Jur****ic
consisting of
genera characterised by
stigated discoidal oxycones—narrow
involute s**** with
narrowly rounded to
angular venters that bear...
- has been
found in Kelat, Baluchistan, in today's ****stan. Its involute,
oxycone s**** has very
small umbilicus and
umbilical wall is
smoothly rounded....
- large,
reaching diameters of 33 cm (13 in)or so,
forming smooth,
involute oxycones with
narrow or
sharp rims and
closed umbilici.
Forbesiceras (in French)...
- Sinemurian.
Animals belonging to this
genus had
small s**** that had
oxycone whorl section and
sharp venter when young. In the case of
older specimens...
-
family Oppeliidae characterized by compressed,
involute s****;
typically oxycones with
complex sutures.
Includes Streblites, Pseudoppelia, and Substreblites...
- the
Oppeliidae from the
Upper Jur****ic, s**** of
which are
typically oxycones with a
tricarinate venter and
falcoid ribbing,
commonly divided by a median...
-
Plectoceratidae (Flower, 1984). Flower, (1984). Bodeiceras; a New
Mohawkian Oxycone, with
Revision of the
Older Barrandeocerida and
Discussion of the Status...
- ribbing.
While some
members are
involute and some
Oxynoticeratidae were
oxycone, most of the
species were evolute.
Psiloceratidae -
Evolute s**** with...
