The Ammonellipsitinae is a subfamily (one of two) within the
Pericyclidae
Pericyclidae is one of nine families of the Pericycloidea superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish
Cuttlefish or cuttles are marine molluscs of ...
, a family within the
goniatitid superfamily
Pericycloidea
Pericycloidea is one of seventeen superfamilies of the Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopodes, and cuttlefish, and more distantly to the nautiloid
...
from the Lower
Carboniferous
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...
(
Mississippian) characterized by having a suture in which the sides of the ventral lobe diverge and the first lateral saddle is acute or subacute, and in which the immature and juvenile shell has a wide umbilicus.
Of the four genera so far included, ''Fascipericyclus'', ''Helicocyclus'', and ''Stenocyclus'' were once considered subgenera of ''Pericyclus''. The type genus, ''Ammonellisites'' was also included in the older Pericylitinae that was part of the Goniatitidae in Miller et al. (1960)
Ammonellipsitinae have been found mostly in Europe but some have been found in North America (US) as well
References
* Miller, Furnish, and Schindewolf (1960) ; Paleozoic Ammonoidea, in the Treatise on Invertebrate Paleontology, Part L, Ammonoidea; Geological Soc. of America and Univ of Kansas.
* .
Pericyclidae
Fossil taxa described in 1996
{{Goniatitida-stub