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 jeromei sp. nov. Fig. 4 G-P Diagnosis Massive and subrectangular species of Bairdia , with DB and VB subparallel, long DB (~ 60% of Lmax), rhombic dorsal view. Etymology Personal dedication to Jérôme Cougoul. Material examined Holotype One carapace ( Fig. 4G ), sample 05PAJ43, collection number P6M2945 . Paratype One carapace ( Fig. 4J ), sample 05PAJ43, collection number P6M2948. Other material 10 carapaces, several fragments. The species is known from its type locality only. Type locality Wujiaping and Daye Formations (samples 05PAJ23, 25, 26, 28, 32, 42, 43), Dajiang section ( 25°33’56’’N- 106°39’41’’E ), Guizhou Province , South China , Changhsingian and Griesbachian, Late Permian and Early Triassic. Measurements ( Fig. 6 ) L = 722 – 1024 μm; H = 410 – 597 μm; H/L = 0.56 – 0.64. Description Carapace massive, elongated and subrectangular in lateral view; surface smooth; LV larger than RV, overlapping at dorsum and VB; bairdian beaks at AB and PB poorly expressed; PDB, DB and ADB distinct at both valves; PDB steeply bent backward, long (~ 65% of Hmax) and slightly convex; DB long (~60% of Lmax) and gently convex; ADB slightly concave at RV, shorter than PDB; ventral part rounded; VB long, convex at LV, concave at RV; AVB and PVB rounded, AVB longer than PVB; carapace slightly postplete to amplete; Lmax below mid-H; dorsal view rhombic with LV’s Wmax in posterior 1/3 of Lmax, in anterior 1/3 at RV. Fig. 6. Height/length diagram of Bairdia jeromei sp. nov. Remarks In lateral view, Bairdia jeromei sp. nov. is similar to Orthobairdia sp.1 sensu Crasquin et al. , 2010 from the Permian of the Meishan section, Zhejiang Province , South China ( Crasquin et al. 2010 ) but here the dorsal view clearly precludes the generic attribution to Orthobairdia .