†Paraspiriferina billingsi retusa Girty 1909 (lamp shell)
Rhynchonellata - Spiriferinida - Paraspiriferinidae
Alternative combination: Spiriferina billingsi retusa
Full reference: G. H. Girty. 1909. The Guadalupian fauna. United States Geological Survey Professional Paper 58:1-651
Belongs to Paraspiriferina billingsi according to G. A. Cooper and R. E. Grant 1976
See also Girty 1909
Sister taxa: none
Type specimen: USNM 118600, a shell
Ecology: stationary low-level epifaunal suspension feeder
Distribution: found only at USGS 2926 green, Capitan Peak, Guadalupe Mountains (Permian of Texas)