Strophomenata - Productida - Linoproductidae

Alternative combinations: Costatumulus phosphaticus, Productus phosphaticus

Full reference: G. H. Girty. 1910. The fauna of the Phosphate beds of the Park City Formation. United States Geological Survey Bulletin 436:1-82

Belongs to Cancrinella according to W. Z. Li et al. 2012

Sister taxa: Cancrinella alazeica, Cancrinella binata, Cancrinella boonensis, Cancrinella cancrini, Cancrinella cancriniformis, Cancrinella grandis, Cancrinella janischewskiana, Cancrinella koninckiana, Cancrinella missunae, Cancrinella nunduva, Cancrinella omolonensis, Cancrinella parva, Cancrinella penzhinaensis, Cancrinella planumbona, Cancrinella platiumbonata, Cancrinella pseudodjulfaensis, Cancrinella pseudotruncata, Cancrinella quadrata, Cancrinella rugatostriata, Cancrinella rugosa, Cancrinella sparsispinosa, Cancrinella subquadrata, Cancrinella subtilis, Cancrinella tenuissima, Cancrinella truncata, Cancrinella venevi, Platycancrinella grandauris

Type specimen: Its type locality is USGS 3511, Cap Rock Mine, Montpelier Canyon, Bear Lake County, which is in a Roadian carbonate limestone in the Phosphoria Formation of Idaho

Average measurements (in mm): shell 28.5 x 22.8, valve 24.0 x 27.3