Orthobairdia texana (Harlton, 1927)

Fig. 8M–N

Bairdia texana Harlton, 1927: 210, pl. 33 fig. 9.

Bairdia chasae Kellett, 1934: pl. 18 figs 5a–d, pl. 19 figs 5a–d.

Bairdia guadalupiana Hamilton, 1942: 714, pl. 110 figs 5a–b.

Orthobairdia texana – Sohn 1960: 68, 69, pl. 3 fig. 29 with all the previous references therein. — Hoare et al. 1999: 444, figs 3.22–3.25.

Material examined

USA • 1 right valve; Guadalupe Mountains, West Texas, ‘ McKittrick Canyon’ Member, Bell Canyon Formation, MKCS1 section, sample 4 (GM5); Capitanian, Middle Permian; MNHN.F. F63431 • 1 right valve; Guadalupe Mountains, West Texas, Williams Ranch Member, Cutoff Formation, Quarry section, sample GM1; Roadian, Middle Permian; MNHN.F. F63432 • 3 valves; Guadalupe Mountains, West Texas, Williams Ranch Member, Cutoff Formation, Quarry section, sample GM1; Roadian; MNHN.F. F63659 • 10 valves; same locality as for preceding; ‘ McKittrick Canyon’ Member, Bell Canyon Formation, MKCS1 section, samples 4 (GM5) and 2 (GM6), Capitanian; Middle Permian; MNHN.F. F63494 .

Occurrence

Kansas, Texas, Missouri, Oklahoma, Nebraska, Illinois, Ohio, USA, Pennsylvanian (Sohn 1960 and all references therein); Glass Mountains, West Texas, USA, Roadian, Middle Permian (Hamilton 1942); Ischimbaev District (North Ural?), Russia, Early Permian (Sohn 1960); Germany, Permian (Sohn 1960); Appalachian Basin, USA, Pennsylvanian (Hoare et al. 1999); sample GM1, Quarry section, Williams Ranch Member, Cutoff Formation, Roadian; samples 4 (GM5) and 2 (GM6), MKCS1 section, ‘McKittrick Canyon’ Member, Bell Canyon Formation, Capitanian; Guadalupe Mountains, West Texas, USA, Middle Permian (this work).