Strophomenata - Productida - Productellidae

Alternative combination: Productus opimus

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

Belongs to Liosotella according to G. A. Cooper and R. E. Grant 1975

Sister taxa: Liosotella angustata, Liosotella compacta, Liosotella cooperi, Liosotella costata, Liosotella decimana, Liosotella grandicosta, Liosotella heilongjiangensis, Liosotella hemispherica, Liosotella irregularis, Liosotella magnirugosa, Liosotella miaolingensis, Liosotella minuscula, Liosotella mongugaensis, Liosotella parva, Liosotella popei, Liosotella rotunda, Liosotella rugosa, Liosotella spinumbona, Liosotella subcylindrica, Liosotella subrugosa, Liosotella tetragonalis, Liosotella texana, Liosotella wordensis

Type specimen: Its type locality is USGS 2930 green, Pine Spring, Guadalupe Mountains, which is in a Wordian slope limestone in the Bell Canyon Formation of Texas

Average measurements (in mm): shell 17.0 x 24.9, valve 17.7 x 27.0