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 Genus Denticupachydomella Yuan in Yuan et al ., 2009 Type species Denticupachydomella spinosa Yuan in Yuan et al ., 2009 by original designation. Original diagnosis “A new Pachydomellidae genus with left valve having straight dorsal border, two horny dorsal spines erecting at the anterior cardinal angle, one stronger spine at the posterior cardinal angle, three denticles along dorsal border, one posteroventral spine and pustulous lateral surface.” (from Yuan et al. 2009: 392–393 ). Emended diagnosis A new genus with a relatively massive postero-ventral spine, spines of various morphology and strength developed along the dorsal margin of the left valve and surface pustulose. Assigned species The following species are herein re-assigned to the genus Denticupachydomella : Microcheilinella ? multinodosa Forel in Crasquin et al. , 2010 from the Changhsingian, Late Permian of the Meishan section, Zhejiang Province , China ( Crasquin et al. 2010 ); Microcheilinella sp. D in Zazzali (2016: 208–209 , pl. 14f–g, unpublished material, PhD thesis), Late Capitanian, Middle Permian, Penglaitan section, Guangxi , South China ( Fig. 11R–S ). Remarks The thorough comparison of ornate Microcheilinellidae revealed that all the above-mentioned species share postero-ventral spines on both valves and spines/nodules/pustules along the dorsal margin and over the lateral surface. Conversely, the two horny dorsal spines and the three denticles along the dorsal border originally described by Yuan et al. (2009) as of generic significance to the newly erected genus Denticupachydomella rather appear as variations of the morphology and strength of the spines, thus being of specific significance. The diagnosis of Denticupachydomella Yuan in Yuan et al. , 2009 is here emended to clarify this issue of generic versus specific characters.