ammonites
Acrothele affinis Resser 1939 (lamp shell)

Lingulata - Lingulida - Acrothelidae

Full reference: C. E. Resser. 1939. The Spence Shale and its fauna. Smithsonian Miscellaneous Collections 97(12):1-29

Belongs to Acrothele according to C. E. Resser 1939

Sister taxa: Acrothele primaeva, Acrothele speciosa

Type specimen: USNM 52015

Ecology: stationary low-level epifaunal suspension feeder