Rhynchonellata - Spiriferinida - Paraspiriferinidae

Alternative combinations: Spiriferina billingsi, Spiriferina billingsii

Full reference: B. F. Shumard. 1858. Notice of new fossils from the Permian strata of New Mexico and Texas, collected by Dr. George G. Shumard, geologist of the United States Government expedition for obtaining water by means of artesian wells along the 32nd parallel, under the direction of Capt John Pope, US Corps Topographic Engineers. Transactions of the Academy of Science of St. Louis 1:290-297

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

Sister taxa: Paraspiriferina amoena, Paraspiriferina cellulana, Paraspiriferina convexa, Paraspiriferina evax, Paraspiriferina formulosa, Paraspiriferina gentilis, Paraspiriferina ghundiensis, Paraspiriferina laqueata, Paraspiriferina multiplicata, Paraspiriferina paginata, Paraspiriferina pulchra, Paraspiriferina punjabensis, Paraspiriferina rotundata, Paraspiriferina sapinea, Paraspiriferina setulosa, Paraspiriferina transversa

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 11.0 x 13.6, valve 13.9 x 18.3