Rhynchonellata - Rhynchonellida - Wellerellidae

Alternative combination: Pugnax bidentata

Full reference: G. H. Girty. 1908. The Guadalupian fauna. United States Geological Survey Professional Paper 58:1-651

Belongs to Wellerella according to G. A. Cooper and R. E. Grant 1976

Sister taxa: Wellerella arthaberi, Wellerella connivens, Wellerella delicatula, Wellerella girtyi, Wellerella globosa, Wellerella granum, Wellerella hemiplicata, Wellerella lemasi, Wellerella longiplicata, Wellerella minuta, Wellerella multiplicata, Wellerella nitidula, Wellerella osagensis, Wellerella polycostata, Wellerella rotunda, Wellerella saxatilis, Wellerella tetrahedra, Wellerella tetraplicata, Wellerella truncata

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 6.99 x 7.12