-
Oncoceratidae are
characterized by
generally compressed, cyrtoconic, and
breviconic s**** with an
exogastric curvature such that the
ventral profile is convex...
-
others curved (cyrtoconic); some were long (longiconic),
others short (
breviconic). Some long-s****ed
forms like
Endoceras attained s****
lengths close...
- an
oncocerid in the Brevicoceratidae, in
having a curved, expanded,
breviconic phragmocone with straight,
transverse sutures.
Paleontology portal Marine...
-
central Europe. Grimsbyoceras,
named by
Foerste in 1926, has a depressed,
breviconic s****, with an
elliptical transverse aperture,
without a
hyponomic sinus...
- of
orthocerids from the
Silurian of
North America. S**** are short,
breviconic, and
faintly curved.
Sutures are
fairly wide
spaced and
though straight...
-
Conostichoceras is a
genus of exogastric,
breviconic oncocerids included in the
family Nothoceratidae,
known from the
Middle Devonian of
central Europe...
- Devonian.
Gonatocyrtoceras is
characterized by
strongly curved, depressed,
breviconic s****.
Curvature is exogastric,
meaning the lower, or ventral, side is...
-
deciduous early growth stages which undergo period truncation and an
inflated breviconic mature ascoceroid stage. The
Ascoceratidae are
divided into two, unequal...
-
Actinoceratidae and
found in
North America.
Kochoceras is
relatively short,
breviconic, and grew to be
fairly large with a s**** more
rapidly expanding than...
-
Silurian characterized by short,
essentially straight s****
referred to as
breviconic,
typically with a
faintly exogastric shape produced by the
profile of...
