Ammonellipsitinae

The Ammonellipsitinae is a subfamily (one of two) within the Pericyclidae, a family within the goniatitid superfamily Pericycloidea from the Lower Carboniferous (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.

Ammonellipsitinae
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Goniatitida
Family:	†Pericyclidae
Subfamily:	†Ammonellipsitinae Riley 1996
Genera
Ammonellipsites Fascipericyclus Helicocyclus Stenocyclus

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.
• "The Paleobiology Database". Retrieved 8 June 2014..