ammonites
Elliptechinus Schneider et al. 2005 (sea urchin)

Echinoidea - Perischoechinoidea - Lepidocentridae

Full reference: C. L. Schneider, J. Sprinkle, and D. Ryder. 2005. PENNSYLVANIAN (LATE CARBONIFEROUS) ECHINOIDS FROM THE WINCHELL FORMATION, NORTH-CENTRAL TEXAS, USA. Journal of Paleontology 79(4):745-762

Parent taxon: Lepidocentridae according to C. L. Schneider et al. 2005

Sister taxa: Albertechinus, Aulechinus, Deneechinus, Ectinechinus, Eothuria, Hyattechinus, Kongielechinus, Koninckocidaris, Lepidechinoides, Lepidechinus, Lepidocentrus, Myriastiches, Palaeodiscus, Perischodomus, Pholidechinus, Pholidocidaris, Porechinus

Subtaxa: none

Ecology: slow-moving low-level epifaunal grazer