Bairdia, McCoy, 1844

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, Geodiversitas 39 (4), pp. 651-690 : 662

Bairdia cf. mianyangensis Chen, 1982 ( Fig. 7 M-O)

Bairdia cf. mianyangensis Chen, 1982: 123, pl. IV, figs 14-18.

MATERIAL EXAMINED. — Four complete and three incomplete carapaces.

OCCURRENCES. — Samples 07 PB 03-1 and 07 PB 03-3 Khao Kana section, Pha Nok Khao Formation, Phetchabun Province, Early Permian.

DIMENSIONS. — H = 0.47-0.64 mm, L = 0.61-1.11 mm, H/L = 0.57-0.58.

REMARKS

Chen (in Chen & Shi 1982: 123, pl. 4, figs 14-18) described a new species Bairdia ? mianyangensis from the latest Permian of Mianyang, Hubei, South China. Their specimens are incomplete carapaces but such characters as unusual DB of RV inclined frontward with strong overlap at DB and flattened AVB and PVB can be distinguished. The specimens recovered here resemble B.? mianyangensis in lateral outline and the mentioned characters; however, our specimens are longer and the VB is less concave than those of B.? mianyangensis.

Figures

FIG. 7. — Ostracods from Indochina Block, Central Thailand.All specimens are stored at the Suranaree University of Technology Collections (Nakhon Ratchasima, Thailand) numbers SUT-09-xxxx. All the specimens are complete carapaces in right lateral view. A-F, Bairdia grotei Chitnarin, n. sp.; A, SUT-09-2188, sample 07PB04-2; B, paratype, SUT-09-2189, sample 07PB04-2; C, SUT-09-2192, sample 07LB05-B2; D, SUT-09-2203, sample 07PB04-2; E, paratype, SUT-09-2204, sample 08LO07-1; F, holotype, SUT-09-2206, sample 08LO02-11. G-L, Bairdia cf. fangnianqiaoi Crasquin, 2010; G, SUT-09-2260, sample 07LB05-4; H, SUT- 09-2263, sample 08LB01-1; I, SUT-09-2261, sample 07LB05-B3; J, SUT-09-2270, sample 07LB05-B3; K, SUT-09-2271, sample 07PB04-2; L, SUT-09-2279, sample 07PB04-2. M-O, Bairdia cf. B.? mianyangensis Chen, 1982; M, SUT-09-2254, sample 07PB03-3; N, SUT-09-2252, sample 07PB03-3; O, SUT-09-2250, sample 07PB03-3. Scale bars: 100 µm..