Rhynchonellata - Spiriferida - Spiriferidae

Full reference: J. Hall. 1858. Palaeontology of Iowa. Report of the Geological Survey of the state of Iowa 1(2):473-724

Belongs to Spirifer according to R. D. Hoare 1961

Sister taxa: Spirifer acutiplicatus, Spirifer bambadhurensis, Spirifer baschkirica, Spirifer battu, Spirifer battus, Spirifer bistritzae, Spirifer bisulcatus, Spirifer brandis, Spirifer byrangi, Spirifer concentricus, Spirifer crebristria, Spirifer dichotomus, Spirifer distefanii, Spirifer dvinaensis, Spirifer enderlei, Spirifer engelgardthi, Spirifer fayettevillensis, Spirifer holodnensis, Spirifer liangchowensis, Spirifer lirellus, Spirifer malistanensis, Spirifer octoplicatus, Spirifer pentagonoides, Spirifer pentlandi, Spirifer piassinaensis, Spirifer postventricosus, Spirifer pseudotasmaniensis, Spirifer rakuszi, Spirifer rariplectus, Spirifer rockymontanus, Spirifer schellwieni, Spirifer siculus, Spirifer spitiensis, Spirifer spurius, Spirifer subgrandiformis, Spirifer subtrigonalis, Spirifer supracarbonicus, Spirifer supramosquensis, Spirifer tareiaensis, Spirifer undata, Spirifer uralicus

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 14.4 x 17.6