Original description of Aporrhais decemlirata Conrad, 1858 cited by Sohl, 1960, p. 99:
- "Spire elevated, acute; volutions nine, convex, longitudinally costate, and finely striated transversely; ribs distant, prominent, angular, acute, short on the back of the body, but extending in front to a carinated line which borders the labrum; transverse striae distinct at base; labrum extended into the rostrum above the middle, where it is angulated and sub-carinated and channeled within."
Locus typicus: Owl Creek, Tippah County, Missouri, USA
Stratum typicum: Owl Creek Formation, Maastrichtian, upper Cretaceous
Graciliala decemlirata in Sohl, 1960, pl. 11, fig. 5 and 11
- image courtesy of the U.S. Geological Survey
Original comment of Sohl, 1960:
- "The holotype of G. decemlirata is not present in the collections of the Academy of Natural Sciences of Philadelphia and must be presumed lost. No other mature specimens are available for study, and the identification of the species rest primarily upon Conrad’s original description and illustration."