Middle Permian ostracods (Crustacea) from the Guadalupe Mountains, West Texas, USA Author Tarnac, Anaëlle D9FF2E72-B3F0-4EC7-ADC2-3F04D27E7E1E Centre de Recherches en Paléontologie - Paris, MNHN - SU - CNRS, 8 rue Buffon, 75005 Paris, France. tarnac.anaelle@gmail.com Author Forel, Marie-Béatrice 063C1F7E-6D26-48F9-A8B1-2AFA496B5FB8 Centre de Recherches en Paléontologie - Paris, MNHN - SU - CNRS, 8 rue Buffon, 75005 Paris, France. marie-beatrice.forel@mnhn.fr Author Nestell, Galina 4343960A-89AF-47A7-8418-6B715A7ED791 Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, TX 76019, USA. gnestell@uta.edu Author Nestell, Merlynd 544B3992-191B-4427-B1F7-7A19A9CBCB63 Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, TX 76019, USA. nestell@uta.edu Author Crasquin, Sylvie 6FDDD550-8522-404D-B3A2-D30BFAA86927 Centre de Recherches en Paléontologie - Paris, MNHN - SU - CNRS, 8 rue Buffon, 75005 Paris, France. sylvie.crasquin@mnhn.fr text European Journal of Taxonomy 2021 2021-09-22 770 1 60 http://dx.doi.org/10.5852/ejt.2021.770.1499 journal article 4088 10.5852/ejt.2021.770.1499 003a15e3-4b3f-423c-b40b-7f08fa1b1a75 2118-9773 5536263 33F92DB8-3122-4F8E-995B-DBF260B3E390 Microcheilinella postspinosa Chen, 1958 Fig. 11L Microcheilinella postspinosa Chen, 1958: 254 , pl. 2 figs 1–6. Microcheilinella postspinosa – Chen & Bao 1986: 110 . non Microcheilinella postspinosa – Crasquin-Soleau & Baud 1998: 146 , pl. 7 figs 5–9. Material examined USA • 1 complete carapace ; Guadalupe Mountains , West Texas , ‘ McKittrick Canyon’ Member , Bell Canyon Formation , MKCS1 section, sample 2 (GM6); Capitanian , Middle Permian ; MNHN.F. F63465 • 1 left valve ; same locality as for preceding but sample 4 (GM5); Capitanian , Middle Permian ; MNHN.F. F63472 . Occurrence Chishia Limestone, Kwanshan, Lungtan, China , Kungurian, Early Permian ( Chen 1958 ); Jurong, China , Kungurian, Early Permian ( Chen & Bao 1986 ); samples 4 (GM5) and 2 (GM6), MKCS1 section, Fig. 11 (next page). SEM micrographs of ostracods from the Middle Permian (Roadian, Quarry section, samples GM1, GM2 and GM4; Capitanian, MKCS 1 section, samples 4 (GM5) and 2 (GM6)) of the Guadalupe Mountains (West Texas , USA ), except R and S from the late Capitanian, Middle Permian, Penglaitan section, Guangxi , South China ( Zazzali 2016 , unpublished PhD thesis). All specimens from A–Q are temporarily housed in the collections of the Muséum national d’histoire naturelle, Paris, France ( MNHN ), specimens R and S are housed in the collections of the Sorbonne University, Paris, France . A–B . Ceratobairdia cf. ventrocostata Wang, 1978 . A . External view of a left valve, sample 4 (GM5) ( MNHN .F. F63454 ). B . External view of a left valve, sample 2 (GM6) ( MNHN .F. F63455 ). – C–G . Ceratobairdia pratti Forel sp. nov. C . Holotype , right lateral view of a carapace, sample GM1 ( MNHN .F. F63456 ). D . Paratype , external view of a left valve, sample GM1 ( MNHN .F. F63457 ). E . External view of a left valve, sample GM1 ( MNHN .F. F63458 ). F . External view of a left valve, sample GM1 ( MNHN .F. F63459 ). G . External view of a left valve, sample GM1 ( MNHN .F. F63460 ). – H–I . Petasobairdia campbelli Chitnarin in Chitnarin et al ., 2017 . H . External view of a left valve, sample GM2 ( MNHN .F. F63461 ). I . External view of a left valve, sample GM4 ( MNHN .F. F63462 ). – J . Petasobairdia cf. bicornuta Chen in Chen & Shi, 1982 , right lateral view of a carapace, sample 4 (GM5) ( MNHN .F. F63463 ). – K . Petasobairdia ? sp., external view of a right valve, sample 4 (GM5) ( MNHN .F. F63464 ). – L . Microcheilinella postspinosa Chen, 1958 , right lateral view of a carapace, sample 2 (GM6) ( MNHN .F. F63465 ). – M . Microcheilinella sp. 15 in Zazzali et al . (2015) , right lateral view of a carapace, sample 4 (GM5) ( MNHN .F. F63466 ). – N–O . Microcheilinella sp. N . Right lateral view of a carapace, sample 2 (GM6) ( MNHN .F. F63467 ). O . Right lateral view of a carapace, sample 4 (GM5) ( MNHN .F. F63468 ). – P–Q . Denticupachydomella bellcanyonensis Forel sp. nov. P . Holotype , right lateral view of a carapace, sample 4 (GM5) ( MNHN .F. F63469 ). Q . Paratype , external left of a right valve, sample 2 (GM6) ( MNHN .F. F63470 ). – R –S . Microcheilinella sp. D in Zazzali (2016) . R . Dorsal view of a carapace (P6M 3778). S . Right lateral view of a carapace (P6M 3779). Scale bars: 100 µm. ‘McKittrick Canyon’ Member, Bell Canyon Formation, Guadalupe Mountains, West Texas , USA , Capitanian, Middle Permian (this work).