Petasobairdia campbelli Chitnarin in Chitnarin et al., 2017

Fig. 11H–I

Petasobairdia campbelli Chitnarin in Chitnarin et al., 2017: 670, figs 12j–p.

Material examined

USA • 1 left valve; Guadalupe Mountains, West Texas, Williams Ranch Member, Cutoff Formation, Quarry section, sample GM2; Roadian, Middle Permian; MNHN.F. F63461 • 1 left valve; same locality as for preceding but sample GM4; Roadian, Middle Permian; MNHN.F. F63462.

Occurrence

Central Thailand, Artinskian, Roadian?, Early–Middle Permian (Chitnarin et al. 2017); samples GM2, GM4, Quarry section, Williams Ranch Member, Cutoff Formation, Guadalupe Mountains, West Texas, USA, Roadian, Middle Permian (this work).