Aenigmatoceras
Encyclopedia
Aenigmatoceras is a genus of ammonite
cephalopod
from the Carboniferous of Russia
. It is tentatively placed within the family Cravenoceratidae
based on similarities with Tympanoceras.
Ammonite
Ammonite, as a zoological or paleontological term, refers to any member of the Ammonoidea an extinct subclass within the Molluscan class Cephalopoda which are more closely related to living coleoids Ammonite, as a zoological or paleontological term, refers to any member of the Ammonoidea an extinct...
cephalopod
Cephalopod
A cephalopod is any member of the molluscan class Cephalopoda . These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles modified from the primitive molluscan foot...
from the Carboniferous of Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
. It is tentatively placed within the family Cravenoceratidae
Cravenoceratidae
The Cravenoceratidae is one of six families included in the ammonoid superfamily Neoglyphiocerataceae, which lived during the latter part of the Paleozoic era....
based on similarities with Tympanoceras.