Strophomenata - Productida - Productidae

Alternative combinations: Horridonia bullocki, Sowerbina bullocki

Full reference: S. J. Nelson and C. E. Johnson. 1968. Permo-Pennsylvanian brachythyrid and horridonid brachiopods from the Yukon Territory, Canada. Journal of Paleontology 42(3):715-746

Belongs to Bruntonia according to L. Angiolini and S. L. Long 2008

Sister taxa: Bruntonia granulifera, Bruntonia maynci, Bruntonia rudis

Type specimen: UA 524, a shell (Articulated shell)

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): valve 36.0 x 41.4