Langdaia bullabalvanyensis Crasquin, 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 : 201

Langdaia bullabalvanyensis Crasquin sp. nov.

Figs. 5 , 6A–G .

2008 Langdaia suboblonga Wang, 1978 ; Crasquin et al. 2008: 238,

pl. 1: 3

Etymology: From the occurrence in both Bulla, Italy and Bálvány, Hungary sections.

Type material: Holotype: one complete carapace, Fig. 6A , UPMC P6M2762 , sample 05BU19, Bulla section . Paratype: one complete carapace, Fig. 6B , UPMC P6M2763 , sample 05BU19, Bulla section .

Type locality: Bulla section, Dolomites, Northern Italy .

Type horizon: Mazzin Member , Werfen Formation , Griesbachian , Lower Triassic , Bulla section, Northern Italy (Crasquin et al. 2008) .

Material.—11 complete and 1 broken carapaces, Mazzin Member, Werfen Formation, Bulla section, Northern Italy (Crasquin et al. 2008); sample 08BAN67 (see Fig. 2B), level 8, Gerennavár Limestone Formation, Bálvány North section, Griesbachian, Lower Triassic.

Diagnosis.—A species of Langdaia with large AB, long straight VB, S 2 very faint.

Dimensions.—L 250–500 µm; H 150–320 µm (see Fig. 5 ).

200 250 300 350 400 450 500 550 L (μm)

Description.—Carapace with long straight DB; ACA 140– 150°; AB with large radius of curvature, maximum located at mid−H; VB long, straight in the youngest specimens, a little convex in the adults; PB with quite small radius of curvature, maximum located at or a little below mid−H; DB and VB converge towards the posterior end with an angle of 15° at the instars and 25° at the adults; PCA 150°; S 2 very faint, visible on adult specimens located at mid−H and mid−L; RV overlaps LV all along free margins; surface smooth. Internal features unknown.

Discussion.—Specimens attributed to Langdaia suboblonga Wang, 1978 were found in the Lower Triassic of Northern Italy (Bulla section; Crasquin et al. 2008). This specific attribution is wrong. Langdaia suboblonga Wang, 1978 from lowermost Triassic of South China ( Wang 1978; Crasquin and Kershaw 2005) has a deeper S 2, a more obtuse ACA and a PB with larger radius of curvature. All the other species of the genus are more quadrangular.

Stratigraphic and geographic range.—Mazzin Member, Werfen Formation, Bulla section, Northern Italy, Griesbachian (Crasquin et al. 2008); Bálvány North section, level 8, sample 08BAN67 (see Fig. 2B), Gerennavár Limestone Formation, Griesbachian, Lower Triassic.

Figures

Fig. 5. Height/length diagram of Langdaia bullabalvanyensis Crasquin sp. nov.

Fig. 6. Ostracods from Bálvány North section, Hungary (except A–D from Bulla section, Northern Italy). Right (A, E, G–W) and left (B, C, D, F) lateral views of complete carapaces. A–G. Langdaia bullabalvanyensis Crasquin sp. nov., Griesbachian, Lower Triassic. A. Holotype, UPMC P6M2762, sample 05BU19. B. Paratype, UPMC P6M2763, sample 05BU19. C. UPMC P6M2232, sample 05BU19. D. UPMC P6M2764, sample 05BU19. E. UPMC P6M2765, sample 08BAN67. F. UPMC P6M2766, sample 08BAN67. G. UPMC P6M2767, sample 08BAN67. H, I. Bairdia baudini nom. nov. H. UPMC P6M2785, sample 08BAN48, Changhsingian, Upper Permian. I. UPMC P6M2786, sample 08BAN61, Griesbachian, Lower Triassic. J–M. Bairdia wailiensis Crasquin−Soleau, 2006, Griesbachian, Lower Triassic. J. UPMC P6M2770, sample 08BAN62. K. UPMC P6M2771, sample 08BAN47. L. UPMC P6M2772, sample 08BAN62. M. UPMC P6M2773, sample 08BAN62. N–P. Bairdia anisongae Forel sp. nov. N. Holotype, UPMC P6M2774, sample 08BAN55, Changhsingian, Upper Permian. O. Paratype, UPMC P6M2775, sample 08BAN62, Grisbachian, Lower Triassic. P. UPMC P6M2776, sample 08BAN47, Changhsingian, Upper Permian. Q–U. Bairdia davehornei Forel sp. nov., Griesbachian, Lower Triassic. Q. Holotype, UPMC P6M2777, sample 08BAN61. R. Paratype, UPMC P6M2778, sample 08BAN62. S. UPMC P6M2779, sample 08BAN62. T. UPMC P6M2780, sample 08BAN62. U. UPMC P6M2781, sample 08BAN62. V, W. Bairdia cf. Bairdia davehornei Forel sp. nov., Griesbachian, Lower Triassic. V. UPMC P6M2782, sample 08BAN62. W. UPMC P6M2783, sample 08BAN61. Scale bars 100 µm.