-
Ammonoids are extinct, (typically) coiled-s****ed
cephalopods comprising the
subclass Ammonoidea. They are more
closely related to
living octopuses, squid...
- cephalopods,
along with the
extinct ammonoids (ammonites) and
living coleoids (such as squid, octopus, and kin).
While ammonoids and
coleoids are monophyletic...
- 99 million
years ago.
During this time, the
first ammonoids appeared,
descending from
bactritoid nautiloids.
Ammonoids during this time
period were
simple and differed...
- Goniatids,
informally goniatites, are
ammonoid cephalopods that form the
order Goniatitida,
derived from the more
primitive Agoniatitida during the Middle...
- Tri****ic epoch. The
biostratigraphy is
constrained by the
presence of the
ammonoids Tirolites and Bajarunia, and conodonts. The Tirolites/Columbites beds...
-
agoniatitid ammonoids would die out in the
Taghanic event in the
upper middle Givetian.
Goniatite ammonoids would give rise to
further ammonoid orders, thus...
-
Aldanites is an
extinct cephalopod genus belonging to the
ammonoid order Goniatitida. Aldanites,
named by Ruzhencev, 1965, is
confined to the
Lower Pennsylvanian...
-
Turrilites is a
genus of
helically coiled ammonoid cephalopods from the
lower part of the
Upper Cretaceous (Cenomanian and Turonian);
generally included...
- Đaković,
Mrdak &
Gawlick (2025)
describe three ****emblages of
Anisian ammonoids from the
Komarani and
Bulog formations (Montenegro),
including fossils...
-
Xiaowa Formation,
forming a lagerstätte
known as the
Guanling biota.
Ammonoids and
conodonts found in the
formation constrain its age to the
early Carnian...
