-
Ammonoids are
extinct spiral s****ed
cephalopods comprising the
subclass Ammonoidea. They are more
closely related to
living coleoids (i.e., octopuses...
- cephalopods,
along with the
extinct ammonoids (ammonites) and
living coleoids (such as squid, octopus, and kin).
While ammonoids and
coleoids are monophyletic...
-
fossils available in a
Paris shop to
report the
presence of
snail fossils (
ammonoids) in the Himalayas. Brock's
investigation showed that Gupta's earliest...
- Goniatids,
informally goniatites, are
ammonoid cephalopods that form the
order Goniatitida,
derived from the more
primitive Agoniatitida during the Middle...
-
Xiaowa Formation,
forming a lagerstätte
known as the
Guanling biota.
Ammonoids and
conodonts found in the
formation constrain its age to the
early Carnian...
-
Nannites is a
genus in the
ammonoid cephalopods in the
order Ceratitida from the
middle and
upper Tri****ic (Ladinian and Carnian) of the Alps,
named by...
- Tri****ic epoch. The
biostratigraphy is
constrained by the
presence of the
ammonoids Tirolites and Bajarunia, and conodonts. The Tirolites/Columbites beds...
- at 393.3 Ma.
During this time, the
first ammonoids appeared,
descending from
bactritoid nautiloids.
Ammonoids during this time
period were
simple and differed...
- 2 million
years ago.
During this time, the
first ammonoids appeared,
descending from
bactritoid nautiloids.
Ammonoids during this time
period were
simple and differed...
- the
superficially similar Baculites and
related Cretaceous orthoconic ammonoids. Both are long and
tubular in form, and both are
common items for sale...
