Ostracods (Crustacea) of the Early-Middle Permian (Cisarulian-Guadalupian) from Central Thailand (Indochina Block): Part II, Orders Podocopida, Platycopida and Myodocopida Author Chitnarin, Anisong Author Crasquin, Sylvie Author Forel, Marie-Béatrice Author Tepnarong, Prachya text Geodiversitas 2017 2017-12-29 39 4 651 690 http://dx.doi.org/10.5252/g2017n4a1 journal article 10.5252/g2017n4a1 1638-9395 4536112 urn:lsid:zoobank.org:pub:DB464417-3EA1-4C4E-9C03-624C1627969C Bairdia urodeloformis Chen, 1987 ( Fig. 9 G-J) Bairdia urodeloformis Chen in Shi & Chen, 1987: 40 , pl. 4, figs 17- 23. — Crasquin et al. 2010a: 348 , figs 7G-N. Rectobairdia firmata Chen in Chen & Shi, 1982 : pl. 7, fig. 10 only. Bairdia macdonelli Harlton, 1929b: 157 , pl. 3, figs 7a, b. — Shi & Chen 1987: 35 , pl. 1, figs 1-7, pl. 18, figs 1-4;2002: 63, pl. 2, figs 1-4. MATERIAL EXAMINED. — One incomplete and eight complete carapaces. OCCURRENCES. — Meishan section, Zhejiang Province , latest Permian ( Shi & Chen 1987 ; Crasquin et al. 2010a ); Matan and Pingding sections, Guangxi , South China , Late Permian ( Shi & Chen 2002 ); sample 07 PB 04-2, Nong Phai section, Pha Nok Khao Formation, Phetchabun Province , central Thailand , Early Permian; samples 07LB05, 07LB05-A2, Ta Kli section, Tak Fa Formation, Nakhon Sawan province , Middle Permian, central Thailand ; sample 07 PB 05-3, Ban Naen Sawan I section, Tak Fa Formation, Phetchabun Province , central Thailand , Middle Permian;. DIMENSIONS. — H= 0.25-0.51 mm ,L= 0.54-1.25 mm ,H/L = 0.41-0.46. REMARKS Such characters as long carapace, broadly arched dorsal outline of LV, angulated dorsal outline of RV with small AB located very high and small PB located very low induce the attribution to Bairdia urodeloformis Chen, 1987 described from the latest Permian of South China ( Shi & Chen 1987 ). Bairdia cf. urodeloformis Chen, 1987 ( Fig. 9 K-M) Bairdia urodeloformis Chen in Shi & Chen, 1987: 40 , pl. 4, figs 17- 23. MATERIAL EXAMINED. — 12 complete carapaces. OCCURRENCES. — Sample 08LO02-2, Tham Nam Maholan section, Nam Maholan Formation, Loei Province , northeastern Thailand , Early Permian ; samples 07LB05-A1, 07LB05-B2 and 07LB05-B3, Ta Kli section, Tak Fa Formation, Nakhon Sawan Province , Central Thailand , Middle Permian ; sample 08LB01-1, Khao Som Phot section, Tak Fa Formation, Lopburi Province , central Thailand , Middle Permian . DIMENSIONS. — H = 0.22-0.45 mm , L = 0.63-1.05 mm , H/L = 0.34-0.43. REMARKS The specimens are related to Bairdia urodeloformis from the latest Permian of South China (see references above) by their long carapace, small AB with maximum of convexity located very high and small PB with maximum of convexity located very low. The differences are the longer carapace, the more convex PVB, and the overlap along dorsal border.