Liuzhinia venninae Forel, 2013

Forel, Marie-Béatrice, Crasquin, Sylvie, Hips, Kinga, Kershaw, Steve, Collin, Pierre-Yves & Haas, János, 2013, Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary, Acta Palaeontologica Polonica 58 (1), pp. 195-219 : 205-206

Liuzhinia venninae Forel sp. nov.

Figs. 11 , 12A–K .

Etymology: Dedicated to Professor Emmanuelle Vennin (University of Burgundy, Dijon, France).

Type material: Holotype: one complete carapace, Fig. 12A , UPMC

http://dx.doi.org/10.4202/app.2011.0126 100 150 200 250 300 350 400 450 L (μm)

P6M2842, sample 08BAN63. Paratype: one complete carapace, Fig. 12D , UPMC P6M2845 , sample 08BAN61 .

Type locality: Bálvány North section, Bükk Mountains, Hungary .

Type horizon: Level 8, Gerennavár Limestone Formation , Griesbachian, Lower Triassic .

Material.—128 complete and 8 broken carapaces, samples 08BAN61, 62, 63, 67, and 69 (see Fig. 2B), levels 7, 8, Gerennavár Limestone Formation, Bálvány North section, Hungary, Griesbachian, Lower Triassic.

Diagnosis.—A species of Liuzhinia with small carapace with a long, almost straight DB; which is strongly biconvex in dorsal view.

Dimensions.—L 550–610 µm; H 300–310 µm (see Fig. 11 ).

Description.—Carapace small and strongly convex in dorsal view; DB long and straight; AB with quite large radius of curvature for the genus, maximum of curvature located at mid−H; VB long and straight at LV, gently concave at RV; PB with small radius of curvature (pointed in RV), dorsal part straight at RV; LV slightly overlaps RV on free margin.

Internal features unknown. Discussion.— Liuzhinia venninae sp. nov. is close to Liuzhinia antalyaensis Crasquin−Soleau, 2004 from the Griesbachian of Western Taurus ( Turkey; Crasquin−Soleau et al. 2004b) and Guangxi (South China; Crasquin−Soleau et al. 2006). Here, the DB is longer, the AB has a larger radius of curvature, the carapace is smaller and more inflated in dorsal view. Liuzhinia venninae sp. nov. differs from Liuzhinia praeantalyaensis Forel, 2010 from the Upper Changhsingian of Meishan GSSP (South China; Crasquin et al. 2010a) by the absence of a lateral compression at the extremities, a more developed valve overlap and a higher H/L ratio.

Stratigraphic and geographic range.—Bálvány North section, level 8, samples 08BAN61, 62, 63, 67, and 69 (see Fig. 2B), Gerennavár Limestone Formation, Griesbachian, Lower Triassic.

Figures

Fig. 11. Height/length diagram of Liuzhinia venninae Forel sp. nov.

Fig. 12. Ostracods from Bálvány North section, Bükk Mountains, Hungary. Right lateral (A, D–H, J–U) and dorsal (B, C, I) views of complete carapaces. A–K. Liuzhinia venninae Forel sp. nov., Griesbachian, Lower Triassic. A. Holotype, UPMC P6M2842, sample 08BAN63. B. UPMC P6M2843, sample 08BAN63. C. Dorsal view of a complete carapace, UPMC P6M2844, sample 08BAN63. D. Paratype, UPMC P6M2845, sample 08BAN61. E. UPMC P6M2846, sample 08BAN63. F. UPMC P6M2847, sample 08BAN63. G. UPMC P6M2848, sample 08BAN62. H. UPMC P6M2849, sample 08BAN61. I. UPMC P6M2850, sample 08BAN63. J. UPMC P6M2851, sample 08BAN61. K. UPMC P6M2852, sample 08BAN63. L–R. Liuzhinia bankutensis Forel sp. nov. L. Holotype, UPMC P6M2853, sample 08BAN67, Giresbachian, Lower Triassic. M. Paratype, UPMC P6M2854, sample 08BAN69, Griesbachian, Lower Triassic. N. UPMC P6M2915, sample 08BAN47, Changhsingian, Upper Permian. O. UPMC P6M2855, sample 08BAN63, Giresbachian, Lower Triassic. P. UPMC P6M2856, sample 08BAN67, Griesbachian,Lower Triassic. Q. UPMC P6M2857, sample 08BAN67, Griesbachian, Lower Triassic. R. UPMC P6M2858, sample 08BAN67, Griesbachian, Lower Triassic. S. Liuzhinia sp. A. UPMC P6M2859, sample 08BAN62, Griesbachian, Lower Triassic. T. Liuzhinia sp. B. UPMC P6M2768, sample 08BAN47, Changhsingian, Upper Permian. U. Bairdiacypris fornicata Shi, 1982. UPMC P6M2860, sample 08BAN62, Griesbachian, Lower Triassic. Scale bars 100 µm.