- The
Ancyloceratina were a
diverse suborder of
ammonite most
closely related to the
ammonites of
order Lytoceratina. They
evolved during the Late Jur****ic...
-
Ammonitida is
divided into four suborders, the Phylloceratina, Lytoceratina,
Ancyloceratina, and Ammonitina. The
Phylloceratina is the
ancestral stock, derived...
- Psiloceratina, Ammonitina, Lytoceratina, Haploceratina,
Perisphinctina and
Ancyloceratina all
appearing during the Jur****ic.
Ammonite faunas during the Jur****ic...
- and
Ancyloceratina all
appearing during the Jur****ic.
Heteromorph ammonites (ammonites with open or non-spiral coiling) of the
order Ancyloceratina became...
-
Upper Cretaceous (Cenomanian and Turonian);
generally included in the
Ancyloceratina.
Previously (Arkell, 1957) it was
included in the
ammonoid suborder...
-
cephalopods belonging to the
family of
heteromorph ammonites (suborder
Ancyloceratina).
There is a
possible fossil record of them
being the last ammonites...
-
mostly during the Late Cretaceous, and
often included in the
suborder Ancyloceratina.
Baculitid genera are
characterized by a
small to
minute initial coil...
-
Anisoceratidae is an
extinct family of
heteromorph ammonites which belong to the
Ancyloceratina superfamily Turrilitoidea.
Members of the
family range is from the lower...
-
accepted as
being within the
separate suborder from the Ammonitida, the
Ancyloceratina established by
Wiedmann in 1966.
There are two main
competing theories...
-
indicative of
closer phylogenetic relationships between Perisphinctina and
Ancyloceratina than with
Lytoceratina or Phylloceratina, is
published by
Nishino et...
