-
ammonoids (orders Agoniatitida, Clymeniida, Goniatitida, and Prolecanitida).
Ceratitic –
lobes have
subdivided tips,
giving them a saw-toothed appearance. The...
- subglobular, in others,
trochoidal or uncoiled.
Sutures are
typically ceratitic, with
smooth saddles and
serrate or
digitized lobes. In a few the sutures...
-
characterized in
general by
highly ornamented or
tuberculate s**** with
ceratitic sutures that may
become goniatitic or
ammonitic in some offshoots. (Arkell...
- no
prominent sculpture,
moderately large umbilicus, and
goniatitic or
ceratitic sutures with a
trifid (three pronged)
ventral lobe and few
auxiliary lobes...
- more or less
discoidal s**** with
rounded or
truncate peripheries and
ceratitic sutures,...."
Keeled or
ribbed offshoots may have
simpler or more complex...
- some
derived forms, the
suture pattern becomes simplified,
appearing ceratitic or even goniatitic. The
Ammonitina are
derived from the Phylloceratina...
-
goniatitid ammonoides have
goniatitic sutures. In some the
sutures are
ceratitic, in others, even ammonitic. Nor are
goniatitic sutures limited to the...
- with smooth, grooved, or
keeled venters and
sutures that are
commonly ceratitic or
ammonitic but
goniatitic in a few offshoots.
Clydonitoidea unites 14...
-
Daraelitidae acquire a few
finely serrated lobes (as
characteristic for
ceratitic sutures). The
first lateral saddle is
proportionally small,
though its...
- ventro-lateral tubercles, and a
broadly arched venter. The
suture is
ceratitic with a
large ventral saddle.
Ceratites are
ammonoid cephalopods that lived...
