Rhynchonellata - Spiriferida - Ambocoeliidae

Alternative combination: Crurithyris extima

Full reference: R. E. Grant. 1970. Brachiopods from the Permian-Triassic boundary beds and age of Chhidru Formation, West Pakistan. Stratigraphic Boundary Problems: Permian and Triassic of West Pakistan (University of Kansas Deptartment of Geology Special Pub. 4) 117-151

Belongs to Orbicoelia according to Z. Q. Chen 2006

Sister taxa: Orbicoelia cordata, Orbicoelia dolomitensis, Orbicoelia elongatiformis, Orbicoelia flabelliformis, Orbicoelia fraterculus, Orbicoelia guadalupensis, Orbicoelia inflata, Orbicoelia magna, Orbicoelia pusilla, Orbicoelia speciosa, Orbicoelia tholiaphor, Orbicoelia tschernyschewi, Orbicoelia tumibilis

Type specimen: USNM 153731, a shell (Articulated shell)

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 6.83 x 7.74, valve 4.90 x 5.17