Bivalvia - Solemyida - Solemyidae
Alternative spelling: Petrasma
Parent taxon: Solemya according to E. V. Coan and P. Valentich-Scott 2012
See also Coan et al. 2000, Huber 2010, Kamenev 2009, Sepkoski 2002 and Vokes 1980
Sister taxa: Solemya (Austrosolemya), Solemya (Pseudacharax), Solemya (Solemya), Solemya (Solemyarina), Solemya (Zesolemya), Solemya abbreviata, Solemya alabamensis, Solemya funingensis, Solemya insignifica, Solemya lamarckiana, Solemya lomitensis, Solemya petricoloides, Solemya subplicata, Solemya sulcifera, Solemya togata, Solenomya semseyana, Solenomya sharonensis, Solenomya translineata, Solemya (Janeia) tibetica, Solenomya (Janeia) trapezoides, Janeia elliptica, Solemya (Janeia) minuta
Subtaxa: Solemya (Petrasma) africana Solemya (Petrasma) borealis Solemya (Petrasma) panamensis Solemya (Petrasma) pervernicosa Solemya (Petrasma) pusilla Solemya (Petrasma) velum Solemya (Petrasma) woodwardiana
Type: Solemya borealis
Distribution:
• Quaternary of United States (1: Virginia collection)
• Cretaceous of Svalbard and Jan Mayen (3)
• Jurassic of Svalbard and Jan Mayen (3), the United Kingdom (1)
Total: 8 collections each including a single occurrence