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 Silenites sureeae Chitnarin , n. sp. ( Figs 14 J-L; 19)

H 9 Amm)	Fabalicypris hathaithipae Chitnarin ,9n.9sp.
Paratypes
Holotype
L9Amm)

TYPE MATERIAL. — Holotype , one complete carapace (SUT-09- 2650, Fig.14K ); paratypes , two complete carapaces (SUT-09-2648, Fig. 14J and SUT-09-2661, Fig. 14L ); ETYMOLOGY. — In honour of Dr Suree Teerarungsikul, Department of Mineral Resources, Thailand . MATERIAL EXAMINED. — One incomplete and 13 complete carapaces. DIMENSIONS. — H = 0.42-0.58 mm , L = 0.60-0.90 mm , H/L = 0.62- 0.70, Holotype : H = 0.73 mm , L = 1.08 mm ; Paratype ( Fig. 14J ): H = 0.42 mm , L = 0.60 mm ; Paratype ( Fig. 14L ): H = 0.58 mm , L = 0.90 mm . ( Fig. 19 ). TYPE HORIZON. — Sample 07LB05-D3, Ta Kli section, Tak Fa Formation, Nakhon Sawan Province , central Thailand , Early Permian. FIG. 18. — Height ( H )-length ( L ) diagram of Fabalicypris hathaithipae Chitnarin , n. sp. Scale bar: 100 µm. TYPE LOCALITY. — Nong Phai section ( 16°01’06’’N , 100°58’59’’E ), Pha Nok Khao Formation, Phetchabun Province , central Thailand . OCCURRENCES. — Samples 08LO02-5 and 08LO02-10, Nam Maholan section, Nam Maholan Formation , Loei Province , northeast Thailand , Early Permian ; sample 07 PB04-5 , Nong Phai section, Pha Nok Khao Formation , Phetchabun Province , central Thailand , Early Permian ; samples 07LB05-D2 and 07LB05-D3, Ta Kli section, Tak Fa Formation , Nakhon Sawan Province , Early Permian ; sample 07 PB08-3 , Ban Nean Sawan II section, Tak Fa Formation , Phetchabun Province , central Thailand , Middle Permian ; samples 08LB01-3 and 08LB01-6, Khao Som Phot section, Tak Fa Formation , Lopburi Province , Middle Permian . DIAGNOSIS. — Species of Silenites with rounded subtriangular carapace, highly arched dorsal outline, short and straight DB of RV, H max is located at mid L, AB and PB of the same size. DESCRIPTION Carapace subtriangular; dorsal outline highly arched; DB short, convex at LV, straight at RV which inclined at 15- 25° rearward; ADB long and slightly convex, AB with large radius of curvature, maximum convexity located at lower fourth of H; AVB short and convex; VB concave; PVB short and convex; PB round with large radius of curvature, maximum convexity located at lower fourth of H; maximum of curvature of AB and PB located at the same level; greatest H located at mid L; surface smooth; LV larger and overlapping RV at DB. 1.2 Petasobairdia campbelli Chitnarin , n. sp. 1 Petasobairdia levicornuta Chen, 2002 Petasobairdia campbelli Chitnarin , n. sp. 0.8 Holotype 0.6 0.4 Paratype ) 0.2 mm ( H L (mm) 0 0.6 0.8 1 1.2 1.4 1.6 1.8 REMARKS Silenites sureeae Chitnarin , n. sp. looks similar to three species from the Early Permian of Jiangsu Province , Eastern China ( Chen & Bao 1986 ): 1) Silenites testatus Chen, 1958 ( in Chen & Bao 1986: 125 , pl. 2, figs 10, 11) but differs in having more rounded DB and maximum H located at mid L; 2) S. cf. marginiferus (Geis, 1932) sensu Chen & Bao (1986: 125 , 126, pl. 2, fig. 12) but can be differentiated by the straight DB on RV of S. sureeae ; and 3) S. unicostus Chen & Bao, 1986 ( Chen & Bao 1986: 126 , pl. 2, figs 13, 14) but it lacks a crest on posteroventral region of RV.