-
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...
-
Silurian characterized by short,
essentially straight s****
referred to as
breviconic,
typically with a
faintly exogastric shape produced by the
profile of...
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central Europe. Grimsbyoceras,
named by
Foerste in 1926, has a depressed,
breviconic s****, with an
elliptical transverse aperture,
without a
hyponomic sinus...
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Europe and
North America during the
Middle Silurian.
Octamerella has a
breviconic s**** and a
mature aperture that is
contracted so as to have four pairs...
- (Ammonoidea). The
Parabactritidae are
characterized by
orthoconic and
breviconic s**** with a
large apical angle (greater than
about 10°) and
septal necks...
-
nearly straight, with a
slight exogastic curvature, and is
rather short,
breviconic.
According to Teichert, 1964,
Lavaloceras is more
closely related to Westonoceras...
- (Minnesota, Wisconsin),
named by
Rousseau Flower, 1943. The s**** is
breviconic,
short and
laterally compressed; the
venter more
narrowly rounded than...
- an
oncocerid in the Brevicoceratidae, in
having a curved, expanded,
breviconic phragmocone with straight,
transverse sutures.
Paleontology portal Marine...
-
Clarkoceras is a
genus of
breviconic ellesmerocerid cephalopods, one of only two
genera known to have
crossed from the Late Cambrian, Trempealeauan, into...
