Liuzhinia bankutensis 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 : 206

Liuzhinia bankutensis Forel sp. nov.

Fig. 12L–R .

Etymology: In reference to the tourist center of Bánkút, situated near to the Bálvány North section.

Type material: Holotype: one complete carapace, Fig. 12L , UPMC P6M2853 , sample 08BAN67 . Paratype: one complete carapace, Fig. 12M , UPMC P6M2854 , sample 08BAN69 .

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

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

Material.—14 complete and 2 broken carapaces, samples 08BAN47, 53, 63, 65, 67, and 69 (see Fig. 2B), levels 1 3, 8, Nagyvisnyó and Gerennavár Limestone Formations, Bálvány North section, Hungary, Changhsingian to Griesbachian, Upper Permian–Lower Triassic.

Diagnosis.—A species of Liuzhinia with a rounded PB and a long and straight DB and VB in both valves.

Dimensions.—L 195–290 µm; H 105–150 µm.

Description.—Carapace elongated in lateral view (H/L 0.53); DB long (between 50% and 65% of L) and straight; AB quite hemicircular with small radius of curvature for the genus; VB long and straight in both valves; DB and VB converge at an angle of 15–18° towards the anterior end; PB with quite large radius of curvature (particularly in small specimens); LV overlaps RV all around the carapace; surface smooth; significant intraspecific variation with regard to radius of curvature of PB in larval stages.

Discussion.— Liuzhinia bankutensis sp. nov. could be compared to Liuzhinia venninae sp. nov. (see above), which has a shorter carapace, an AB with larger radius of curvature and a more strongly tapering PB. Liuzhinia praeantalyaensis Forel, 2010 from Changhsingian of South China ( Yi 2004; Crasquin et al. 2010a) has a PB with smaller radius of curvature and laterally compressed extremities. Liuzhinia antalyaensis Crasquin−Soleau, 2004 from the Griesbachian of Taurus ( Turkey, Crasquin−Soleau et al. 2004b) and South China (Guangxi, Crasquin−Soleau et al. 2006) is also close to Liuzhinia bankutensis sp. nov., which has a PB more rounded, a longer DB and a straight VB in RV.

Stratigraphic and geographic range.—Bálvány North section, levels 1, 3, 8, samples 08BAN47, 53, 63, 65, 67, and 69 (see Fig. 2B), Nagyvisnyó and Gerennavár Limestone Formations, Changhsingian to Griesbachian, Upper Permian–Lower Triassic.

Figures

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.