ammonites
Agathiceras ciscoense Smith 1903 (ammonite)

Cephalopoda - Goniatitida - Agathiceratidae

Belongs to Agathiceras according to F. B. Plummer and G. Scott 1937

Sister taxa: Agathiceras anceps, Agathiceras applanatum, Agathiceras applini, Agathiceras contractum, Agathiceras divisum, Agathiceras frechi, Agathiceras girtyi, Agathiceras jilinense, Agathiceras mediterraneum, Agathiceras suessi, Agathiceras sundaicum, Agathiceras tornatum, Agathiceras uralicum, Agathiceras vulgatum

Type specimen: Its type locality is Salt Creek bluff, Graham, which is in a Gzhelian marine shale in the Graham Formation of Texas

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell width 14.0, shell diameter 35.0