Orthobairdia texana ( Harlton, 1927 )

Tarnac, Anaëlle, Forel, Marie-Béatrice, Nestell, Galina, Nestell, Merlynd & Crasquin, Sylvie, 2021, Middle Permian ostracods (Crustacea) from the Guadalupe Mountains, West Texas, USA, European Journal of Taxonomy 770, pp. 1-60 : 33

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).

Figures

Fig. 8 (next page). SEM micrographs of ostracods from the Middle Permian (Roadian, Quarry section, samples GM1 and GM4; Capitanian, MKCS1 section, samples 4 (GM5) and 2 (GM6)) of the Guadalupe Mountains (West Texas, USA). All specimens are temporarily housed in the collections of the Muséum national d’histoire naturelle, Paris, France (MNHN). A–B. Bairdia elcapitanensis Forel sp. nov. A. External view of a right valve, sample GM1 (MNHN.F.F63419). B. Holotype, external view of a right valve, sample GM1 (MNHN.F.F63420). – C. Bairdia cf. postacuta Chen, 1958, right lateral view of a carapace, sample GM1 (MNHN.F.F63421). – D. Bairdia sp. A, right lateral view of a carapace, sample GM1 (MNHN.F.F63422). – E. Bairdia sp. B, right lateral view of a carapace, sample GM1 (MNHN.F.F63423). –F. Bairdia sp. C, right lateral view of a carapace, sample GM1 (MNHN.F.F63424) – G. Bairdiacypris sp. B, right lateral view of a carapace, sample 2 (GM6) (MNHN.F.F63425). – H. Bairdiacypris sp. C, right lateral view of a carapace, sample GM1 (MNHN.F.F63426). – I–J. Fabalicypris acetalata (Coryell & Billings, 1932). I. Right lateral view of a carapace, sample GM1 (MNHN.F.F63427). J. External right of a right valve, sample GM4 (MNHN.F.F63428). – K. Fabalicypris glennensis (Harlton, 1927), right lateral view of a carapace, sample 4 (GM5) (MNHN.F.F63429). – L. Fabalicypris sp., right lateral view of a carapace, sample GM4 (MNHN.F.F63430). – M–N. Orthobairdia texana (Harlton, 1927). M. External right of a right valve, sample 4 (GM5) (MNHN.F.F63431).N. External view of a right valve, sample GM1 (MNHN.F.F63432). – O–R. Ceratobairdia mescaleroella Forel sp. nov. O. Holotype, adult, external view of a left valve, sample 4 (GM5) (MNHN.F.F63433). P. A-1, external view of a left valve, sample 4 (GM5) (MNHN.F.F63434). Q. Paratype, A-1, external view of a left valve, sample 4 (GM5) (MNHN.F.F63435). R. A-1, external view of a left valve, sample 4 (GM5) (MNHN.F.F63436). Scale bars: 100 µm.