Bairdia grotei Chitnarin 2017, n. sp.
Creators: name: Chitnarin, Anisong
name: Crasquin, Sylvie
name: Forel, Marie-Béatrice
name: Tepnarong, Prachya
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Bairdiidae
Bairdia
Bairdia grotei

description: Bairdia grotei Chitnarin, n. sp.   
(Figs 7 A-F; 8)  
 Bairdia sp. 1 – Crasquin et al. 2010b: 25, pl. 1, fig. 23. n. syn.   
TYPE MATERIAL. — Holotype: one complete carapace (SUT-09- 2206, Fig. 7F); paratypes: two complete carapaces (SUT-09-2189, Fig. 7B and SUT-09-2195, Fig. 7E).  
ETYMOLOGY. — In honour of Dr Paul J. Grote, Suranaree University of Technology, Thailand.  
MATERIAL EXAMINED. — 11 complete carapaces.  
DIMENSIONS. — H = 0.35-0.45 mm, L = 0.62-0.74 mm, H/L = 0.57- 0.61, Holotype: H = 0.636 mm, L = 1.07mm; Paratype (Fig. 7B): H = 0.45 mm, L = 0.706; Paratype (Fig. 7E): H = 0.45 mm, L = 0.74 mm (Fig. 8).  
TYPE HORIZON. — Sample 07 PB 04-2, Nong Phai section, Pha Nok Khao Formation, Asselian-Sakmarian, Early Permian.  
TYPE LOCALITY. — Nong Phai section (16°01’06’’N, 100°58’59’’E), Phetchabun Province, central Thailand.  
OCCURRENCES. — Jadar Block, NW Serbia, latest Permian. Samples 07 PB04-2 and 07 PB04-5, Nong Phai section, Pha Nok Khao Formation, Phetchabun Province, Early Permian, Central Thailand; samples 07LB05-A1, 07LB05-B2, 07LB05-D2, Ta Kli section, Nakhon Sawan Province, Middle Permian, Central Thailand; sample 07LB04-17, Phu Lam Yai section, Tak Fa Formation, Nakhon Sawan Province, Early Permian?, Central Thailand; sample 07LB09-1, Khao Phu Chongkho section, Tak Fa Formation, Nakhon Sawan Province, Middle Permian, Central Thailand; sample 08LO02-11, Tham Nam Maholan section, Nam Maholan Formation, Loei Province, Early Permian, Northeastern Thailand; 08LO07-1, Sak Chai Quarry section, Nam Maholan Formation, Loei Province, Early Permian, Northeastern Thailand.  
 DIAGNOSIS. — Species of Bairdia whith spindle shape, PB located at lower 30% of H, AB located at 75% of H, PDB long and parallel to AVB, H/L = 0.57-0.61.   
DESCRIPTION  
Carapace spindle-shaped; dorsal outline broadly arched, maximum of convexity of AB at upper 30% of H, of PB below lower fourth of H; DB straight and slightly inclined backward (10°); ADB straight, angle with DB of 130°; AB rounded with medium radius of curvature, maximum convexity located above mid H; AVB long and nearly straight, angle between AVB and VB is 140°; VB straight at LV, slightly concave at RV; PVB long, slightly convex; PB rounded with small radius of curvature, maximum convexity located below lower fourth of H; PDB long and straight, parallel to AVB; angle between PDB and DB of 150°; LV slightly overlaps RV all around the carapace, overlap moderate at DB and ADB.  
 REMARKS Bairdia grotei Chitnarin, n. sp. can be compared to B. gaelleae Crasquin,2010 from the latest Permian of Meishan, South China (Crasquin et al. 2010a) in lateral view; however here the AB has a smaller radius of curvature and ADB and DB are straighter.   
 Bairdia cf. fangnianqiaoi Crasquin, 2010 (Fig. 7 G-L)   
 Bairdia cf. fangnianqiaoi Crasquin in Crasquin et al., 2010a: 342, 344, fig. 9K-N.   
MATERIAL EXAMINED. — 13 complete carapaces.  
OCCURRENCES. — Sample 07 PB04-2, Nong Phai section, Pha Nok Khao Formation, Phetchabun province, Early Permian, Central Thailand; samples 07LB05-3, 07LB05-4, 07LB05-B3, 07LB05-C1, Ta Kli section, Tak Fa Formation, Nakhon Sawan Province, Middle Permian, Central Thailand; sample 08LB01-1, Khao Som Phot section, Tak Fa Formation, Lopburi Province, Middle Permian, Central Thailand.  
DIMENSIONS. — H = 0.20-0.60 mm, L = 0.60-1.07 mm, H/L = 0.36-0.43.  
REMARKS  
 The specimens recovered are very similar to Bairdia fangnianqiaoi Crasquin, 2010 from the latest Permian of Meishan section (Crasquin et al. 2010a) in lateral view but can be differentiated by a smaller H/L ratio and regularly arched dorsal outline at LV.
description: Published as part of Chitnarin, Anisong, Crasquin, Sylvie, Forel, Marie-Béatrice & Tepnarong, Prachya, 2017, Ostracods (Crustacea) of the Early-Middle Permian (Cisarulian-Guadalupian) from Central Thailand (Indochina Block): Part II, Orders Podocopida, Platycopida and Myodocopida, pp. 651-690 in Geodiversitas 39 (4) on pages 660-662, DOI: 10.5252/g2017n4a1, http://zenodo.org/record/4536112