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Tornoceras is a
strongly involute,
subdiscoidal Middle and
Upper Devonian goniatite with a
suture that
forms six to ten lobes.
Tornoceras is an extinct...
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suborders included in the Goniatitida,
characterized by
generally involute,
subdiscoidal s**** and by
sutures in
which the
ventral ones are undivided. Sutural...
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previously included in the Hungeritidae. The s**** of
Arctohungerites is
subdiscoidal, involute, with a
rounded venter, weak
sigmoidal folds on the body chamber...
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goniatitid family Reticuloceratidae which are
characterized by
involute subdiscoidal s****
covered by
linear or
biconvex growth lines that may be crossed...
- Bisatoceratidae.
Bisatoceras was
named by
Miller and Owen in 1937 and has a
subdiscoidal s**** with a very
narrow or
closed umbilicus.
Whorl height exceeds with...
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arculus is incomplete;
forewing discoidal cell very acute;
large and
acute subdiscoidal cell in hindwing;
primary antenodal braces Ax1 and Ax2
stronger than...
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Acanthoclymeniidae are
characterized by
their small slightly involute,
subdiscoidal,
widely umbilicate s**** that
reach only a few
centimeters in diameter...
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Neoaganides is a small, 1–2 cm
diameter subdiscoidal to
subglobular goniatitid belonging to the
family Pseudohaloritidae that
lived from the Late Pennsylvanian...
- but only one of six
there included in the Treatise, 1957. S**** are
subdiscoidal to
globose with
variable umbilici and
sutures with 10 to 30 lobes, which...
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British Columbia. The s**** of
Griesbachites is involute,
subglobose to
subdiscoidal, ribbed; with
sloping sides converging on an
arched venter. Like Juvavites...
