-
phylloceratids which gave rise to the
great diversity of post-Tri****ic ammonites.
Ceratitids overwhelmingly produced planospirally coiled discoidal s**** that may...
-
genus of
Ceratitids in the
family arpaditida. A.
kingi A
genus of
Ceratitids in the
family arpaditida.
Atractites A.
drakei A
genus of
Ceratitids in the...
- The
Hungaritidae comprises a
family of
ceratitid ammonites described in the Treatise,(Arkell et al. 1957), as
involute compressed, discoidal, with keeled...
-
order Ceratitida. Noritoidea,
defined by
Karpinsky in 1889,
combines ceratitids with "typically smooth, more or less
discoidal s**** with
rounded or...
-
family in the M****ocerataceae, a
superfamily within the
order Ceratitida.
Ceratitids are
ammonoid cephalopods,
mostly from the Tri****ic but with ancestral...
- Zone A
ceratitid Ammotibetites A.
wheeleri Longjiang Xishan A
ceratitid Anasibirites A. kingi****
Tulong Griesbachites–Guembilites Zone A
ceratitid Anatibetites...
-
thornlike projections. The
Phylloceratina are most
likely derived from the
Ceratitid Deineroceratidae,
which is
thought to have
given rise
early in the Tri****ic...
-
Homerites is a
genus of small, involute,
globase fossil ceratitids with an
eccentric outer whorl and
subammonitic sutures belonging to the
family Halortidae...
-
Arcestes is a
genus of
extinct ceratitid ammonites found in Tri****ic-aged
marine strata.
Their s**** were
broad and rounded,
giving them an
almost spherical...
-
ammonite in the
ceratitid family Tropitidae with
spines instead of
nodes on the
umbilical shoulder, at
least in
early whorls.
Ceratitids are
mostly Tri****ic...
