Update and observations on the extraction of ostracods (Crustacea) from the Permian hard carbonate rocks of Iran Author Hemmati, Soheil Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad (Iran) and Département Origines et Évolution, CR 2 P UMR 7207 (MNHN, CNRS, Sorbonne Université), Muséum national d’Histoire naturelle, 57 rue Cuvier, 75231 Paris cedex 05 (France) soheil. hemmati @ mail. um. ac. ir soheil. hemmati @ etu. sorbonne-universite. fr soheil.hemmati@mail.um.ac.ir Author Ghaderi, Abbas Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad (Iran) aghaderi @ um. ac. ir (corresponding author) aghaderi@um.ac.ir Author Crasquin, Sylvie Département Origines et Évolution, CR 2 P UMR 7207 (MNHN, CNRS, Sorbonne Université), Muséum national d’Histoire naturelle, 57 rue Cuvier, 75231 Paris cedex 05 (France) sylvie. crasquin @ mnhn. fr sylvie.crasquin@mnhn.fr Author Ashouri, Ali Reza Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad (Iran) ashouri @ um. ac. ir ashouri@um.ac.ir text Geodiversitas 2024 2024-03-28 46 5 119 133 https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/g2024v46a5.pdf journal article 10.5252/geodiversitas2024v46a5 1638-9395 10889617 urn:lsid:zoobank.org:pub:69FB1D60-D5CE-467A-9A4E-EFCF2A8367F5 Bairdia deducta deducta Zalányi, 1974 ( Fig. 5A1-A6 ) Bairdia deducta deducta Zalányi, 1974: 196-197 , pl. 12, figs 1a-c. — Crasquin-Soleau & Baud 1998 : pl. 8, figs 10-13, 16. — Chitnarin et al. 2017: 666-667 , fig. 11J-L. Cryptobairdia deducta deducta – Kozur 1985a : pl. 6, fig. 2. MATERIAL EXAMINED . — Six complete carapaces, MNHN.F. F72157- F72162 . OCCURRENCES . — Lopingian, Nagyvisnýo Formation, Bükk Mountains, Hungary ( Kozur 1985a ); Late Guadalupian-Early Lopingian Episkopi Formation, Hydra Island, Greece ( Crasquin-Soleau & Baud 1998 ); Cisuralian, Tham Nam Maholan section, Nam Maholan Formation, Loei Province , northeast Thailand ; Guadalupian, Ban Naen Sawan I section, Pha Nok Khao Formation, Phetchabun Province , central Thailand , Late Guadalupian Khao Som Phot section, Tak Fa Formation, Lopburi Province , central Thailand , ( Chitnarin et al. 2017 ). Khachik Formation Unit VI (samples A. 188, AH. 197, A.204, and A. 210), Guadalupian, Ali-Bashi section, Iran (this study). DIMENSIONS. — L = 99.3-108.7 µm; H = 56.1-65.9 µm; H/L = 1.64-1.77. DESCRIPTION Carapace subtriangular; DB and VB irregularly arched; PDB, DB and ADB straight at RV and convex at RV; AB and PB with very small radius of curvature. Strong overlap of LV on RV particularly on all the dorsal part; flattening of AB and dorso-median part of the valves; thickening of the carapace in ventral part.