Selebratina Polenova, 1953

Casier, Jean-Georges, Devleeschouwer, Xavier, Lethiers, Francis, Préat, Alain & Racki, Grzegorz, 2002, Ostracods and fore-reef sedimentology of the Frasnian-Famennian boundary beds in Kielce (Holy Cross Mountains, Poland), Acta Palaeontologica Polonica 47 (2), pp. 227-246 : 233-234

Genus Selebratina Polenova, 1953

Type species: Gravia (Selebratina) dentata Polenova, 1953 . Selebratina vellicata Casier and Lethiers , sp. nov. Fig. 4G–J.

v? Selebratina sp. Lethiers and Casier, 1996: pl. 1: 10–13.

v. Selebratina sp. Lethiers and Casier, 1996; Casier and Lethiers 2000: pl. 1: 5.

Derivation of the name: From Latin vellicare, to pinch. Allusion to mor−

phology of the carapace.

Holotype: Carapace. ( Fig. 4G, H). PG3. IRScNB n° b3774. L = 0.47 mm; H = 0.30 mm; W = 0.28 mm.

Type locality: Psie Górki section at Kielce, Holy Cross Mountains of Poland.

Material.—27 carapaces and valves.

Diagnosis.—Differs from most known species of Selebratina in having regularly arched free borders from anterior to posterior cardinal angles, only one very small posteroventral spine on each valve, a fine admarginal ridge on each valve, and in the dorsal flattening of valves.

Description.—In lateral view, carapace small and slightly preplete with a long straight dorsal margin. Free border regularly arched with posterior elongation of the radius of curvature. Cardinal extremities slightly pinched. Anterior cardinal angle = 130°; posterior cardinal angle = 100°. Surface of valves flattened between the two cardinal extremities and the widest point of the carapace. Maximum length at dorsal third of maximum height, which occurs at anterior two fifths of the length. Very small spine in the posteroventral sector of valves, and delicate admarginal ridges. Carapace biconvex in dorsal view and triangular with the ventral part of the carapace gently curved in anterior view. Maximum width is equal to the maximum height and located slightly posteriorly at the level of spines. Surface of valves smooth.

Occurrence.—In the Psie Górki section, Selebratina vellicata sp. nov. is present in the late Frasnian (PG3, PG5, PG6, PG11, PG14, PG15, PG20, PG21, PG28, P29, PG30) and in the early Famennian (PG31, PG33?). The species is also known in the late Frasnian and the early Famennian of the Kostomłoty section and maybe also in the Frasnian of the FFB GSSP at Coumiac, in the Montagne Noire ( Lethiers and Casier 1996).