Acratia, Delo, 1930

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 : 678

Acratia ? sp.

( Fig. 21I )

MATERIAL EXAMINED. — Two complete carapaces.

OCCURRENCES. — Samples 08LB01-1 and 08LB01-3, Khao Som Phot section, Tak Fa Formation, Lopburi Province, central Thailand, Middle Permian.

DIMENSIONS. — H = 0.39-0.40 mm, L = 0.83-0.85 mm, H/L = 0.46.

REMARKS

Acratia ? sp. is characterized by an unusual reverse overlap of RV over LV. The inversion of overlap was observed by Zazzali et al. (2015: fig. 15C, D) on specimens from Guadalupian- Lopingian boundary of South China. The overlapping of RV over LV can be recognized as a distinct character of the genus Macrocypris Brady, 1867 ( Moore 1961: Q207, fig. 146 1a-1b); however, the studied specimen is assigned here, with doubt, to Acratia due to the presence of acratian beak at AB.

Figures

FIG. 21. — Ostracods from the limestones of the 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 represented by complete carapaces. A-G, Acratia chongpani Chitnarin, n. sp.; A, holotype,right lateral view,SUT-09-2006,sample 07PB03-3;B, dorsal view,SUT-09-2018,sample 07PB03-5;C, ventral view,SUT-09-2042,sample 07PB03-2; D, right lateral view,SUT-09-2036,sample 07PB03-2;E, paratype,right lateral view,SUT-09-2001,sample 07PB03-5;F, paratype,right lateral view,SUT-09-2013, sample 07PB03-5; G, left lateral view, SUT-09-2020, sample 07PB03-3; H, Bairdiidae indet. sp. B, right lateral view, SUT-09-2567, sample 08LB01-2; I, Acratia sp., left lateral view, SUT-09-2055, sample 08LB01-3; J-M, Acratia mongkoli Chitnarin, n. sp.; J, ventral view, SUT-09-2067, sample 07PB04-2; K, holotype, right lateral view, SUT-09-2058, sample 07PB04-2; L, paratype, right lateral view, SUT-09-2063, sample 07LB09-1; M, paratype, right lateral view, SUT-09-2062, sample 07LB09-1; N-P, Baschkirina cf. huzhouensis Forel, 2010; N, left lateral view, SUT-09-2531, sample 08LB01-1; O, left lateral view, SUT-09-2528, sample 08LB01-1; P, right lateral view, SUT-09-2530, sample 08LB01-1. Scale bars: 100 μm.