Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China) Author Forel, Marie-Béatrice text European Journal of Taxonomy 2012 2012-08-01 19 1 34 journal article 21834 10.5852/ejt.2012.19 9a19c75e-a62b-4143-adda-28789a95da5c 2118-9773 3857896 893DB151-7B86-485C-932F-A01C57B20316 Bairdia ? huberti sp. nov. Fig. 4 A-F Diagnosis Species attributed with doubt to the genus Bairdia , with relatively elongated carapace, ADB and DB not distinct, very large AB. Etymology Personal dedication to Hubert Colas. Material examined Holotype One carapace ( Fig. 4D ), sample 05PAJ28, collection number P6M2942 . Paratype One carapace ( Fig. 4C ), sample 05PAJ28, collection number P6M2941. Other material 10 carapaces, several fragments. The species is known from its type locality only. Type locality Wujiaping Formation (samples 05PAJ20, 21, 23, 26-28), Dajiang section ( 25°33’56’’N- 106°39’41’’E ), Guizhou Province , South China , Changhsingian, Late Permian. Measurements ( Fig. 5 ) L = 581 – 837 μm; H = 332 – 512 μm; H/L = 0.53 – 0.64. Description Carapace relatively elongated, ovoid in lateral view; PDB long, straight to slightly convex; PDB-DB angle around 110°; DB and ADB not clearly distinct and along relative constant H, close to Hmax; VB concave; AVB rounded and long (~ 75% of Hmax); PVB very short and rounded; AB with large radius of curvature, maximum located on the upper 1/4 of H; PB with narrow radius of curvature, maximum located in the lower 1/4 of H; Lmax located around mid-H. Remarks High intraspecific variations that mainly affect the ADB and AB are observed in Bairdia ? huberti sp. nov. They create continuum between Cryptobairdia -like (ABD not distinct: Fig. 4 C-E) and Bairdia - like specimens (ABD differentiated: Fig. 4A, B, F ). The new species is therefore attributed with doubt to the genus Bairdia . Bairdia ? huberti sp. nov. is similar to Bairdia broutini Crasquin, 2010 from the Late Permian of the Meishan section, Zhejiang Province , South China ( Crasquin et al. 2010 ) because of the relative constant and high H. However, the new species is more elongated, with longer DB.