Rhynchonellata - Spiriferida - Spiriferidae

Alternative combination: Spirifer curvilateralis

Full reference: W. H. Easton. 1962. Carboniferous formations and faunas of central Montana. United States Geological Survey Professional Paper 348:1-126

Belongs to Anthracospirifer according to Gordon 1975

Sister taxa: Anthracospirifer arcoensis, Anthracospirifer birdspringensis, Anthracospirifer leidyi, Anthracospirifer occiduus, Anthracospirifer oliveirai, Anthracospirifer shawi, Plicatocyrtia zitteli

Ecology: stationary epifaunal suspension feeder