Bairdia, Casier & Devleeschouwer & Lethiers & Préat & Racki, 2002

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 : 238-240

“ Bairdia ” psiegorkiensis Casier and Lethiers, sp. nov.

Fig. 9S–V.

v. “ Bairdia ” sp. nov. C; Casier and Lethiers 2000: pl. 4: 7a, b. Derivation of the name: From the Psie Górki Hill at Kielce, in the Holy Cross Mountains.

Holotype: Carapace. ( Fig. 9s, t). PG15. IRScNB n° b3844. L = 0.38 mm; H = 0.22 mm; W = 0.19 mm.

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

Material.—22 carapaces.

Diagnosis.—Small, elongate (L/H close to 1.7) carapace of a new genus close to Bairdia with a regularly rounded anterior margin at or under mid−height and with a small but well defined concavity at the ventral margin.

Description.—In lateral view, small, preplete carapace. Dorsal border straight and moderately inclined toward the posterior end. Ventral border sinuous: straight posteriorly, concave at mid−length and convex anteriorly. Anterodorsal margin

Fig. 8. A, B. Acratia sp. nov. B, aff. sp. 39

Braun, 1968. Right lateral and dorsal views of a carapace. PG15. IRScNB n° b3819, × 80. C–F. Acratia pentagona sp. nov. C, D. Right lateral and dorsal views of Holotype. PG21. IRScNB n° b3820, × 90. E. Right lateral view of Paratype A. PG21. IRScNB n° b3821, × 90. F. Right lateral view of Paratype B. PG20. IRScNB n° b3822, × 87. G. Acratia supina Polenova, 1953 . Right lateral view of a carapace. PG11. IRScNB n° b3824, × 100. H, I. Acratia supinaeformis Lethiers, 1981 . Left lateral and dorsal views of a carapace. PG3. IRScNB n° b3825, × 90. J, K. Acratia feisti Lethiers and Casier, 1995 . Right lateral and dorsal views of a carapace. PG18. IRScNB n° b3826, × 70. L, M. Acratia ? sp.

sensu Lethiers and Casier (1999). Right lateral and dorsal views of a carapace. PG14. IRScNB n° b3827, × 80. N, O. Acratia saggitaeformis Lethiers and Casier, 1999 ? Right lateral and dorsal views of a broken carapace. PG6. IRScNB n° b3828, × 40. P, Q. Acratiidae sp. nov. A Casier and Lethiers, 2000. Right lateral and dorsal views of a carapace. PG20. IRScNB n° b3829, × 100. R, S. Famenella angulata Rozhdestvenskaja, 1972 . Right lateral and dorsal views of a carapace.

PG44. IRScNB n° b3830, × 80. T, U. Famenella postkairovaensis Lethiers and Casier, 1996 . Right lateral and dorsal views of a carapace. PG29. IRScNB n° b3831, × 100.

straight. Well rounded anterior margin with the anterior extremity at or just below mid−height. Posterodorsal margin nearly straight and strongly inclined. Posterior margin not very rounded and close to the ventral level. Maximum length below mid−height, and maximum height at anterior third of carapace. The left valve overreaches slightly the right one all along the free border, and the ventral overlap is slight. Biconvex in dorsal view with the maximum width at posterior third of length and with rounded extremities. Carapace surface smooth.

Remarks.—“ Bairdia ” psiegorkiensis sp. nov., “ Bairdia ” sp. nov. A Casier and Lethiers, 2000 and “ Bairdia ” sp. nov. B Casier and Lethiers, 2000, from the Kostomłoty section, belong to a new genus characterized by straight, inclined dorsal borders, a small posterior margin close to the ventral level, a straight dorsally and rounded anterior margin. “ B.” psiegorkiensis sp. nov. is distinguished by the diagnosis characters.

Occurrence.—Frasnian of the Psie Górki section (PG3, PG5, PG6, PG8, PG11, PG14, PG15) and also in the Frasnian (KYA3?, KYA11, KYA19) of the Kostomłoty section.