Bairdiacypris antiqua ( Pokorńy, 1951 ), Pokorny, 1951

Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel & Posada, Luis-Carlos Sánchez De, 2016, Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications, Zootaxa 4068 (1), pp. 1-78 : 56-57

Bairdiacypris antiqua ( Pokorńy, 1951)

(Pl. IV: Fig. 10)

1951 Fabalicypris antiqua nov. sp.; Pokorńy: 611–612, text-figs. 4–7, pl. 5, fig. 14. 1960 Fabalicypris ? antiqua Pokorńy ; Sohn: 62.

1965a Fabalicypris antiqua Pokorńy ; Becker: 421–422, pl. 33, fig. 7.

? 1969 Fabalicypris ? cf. holoschurmensis ( Polenova, 1955); Groos: 74–75, pl. 16, fig. 7. 1982 Bairdiacypris sp. 2; Milhau: 20, pl. 3, figs. 69–70.

1992 Fabalicypris ? antiqua Pokorńy ; Casier in Casier et al.: 77, 86, pl. 2, figs. 17–18. 1993 Fabalicypris ? antiqua Pokorńy ; Kasimi: pl. 17, figs. 29–30.

1995 Bairdiacypris antiqua (Pokorńy) ; Casier in Casier et al.: 494, pl. 64, fig. 17.? 1997 Bairdiacypris sp. A; Casier et al.: 156, 158, pl. 3, fig. 6.

2010 Bairdiacypris sp. A; Maillet: 40, pl. 1, fig. 21.

2011a Bairdiacypris antiqua (Pokorńy) ; Casier in Casier et al.: 3, fig. 17. 2011 bBairdiacypris antiqua (Pokorńy) ; Casier in Casier et al.: 114.

2013 Bairdiacypris antiqua (Pokorńy) ; Maillet: 167, pl. XXVI, figs. 11–14. 2013 b Bairdiacypris sp. A; Maillet et al., fig. 4X.

2013 Bairdiacypris antiqua (Pokorńy) ; Casier & Maillet in Casier et al.: 254, 264, fig. 10D. 2013 Bairdiacypris antiqua (Pokorńy) ; Casier in Casier & Préat: 488, pl. V, fig. 11.

Material. 2 specimens (1 C, 1 F).

Diagnosis. Pokorńy (1951, p. 611).

Description. Large elongated carapace, bean-shaped in lateral view, biconvex in dorsal view. Overlap of the larger LV over the RV along the whole outline. Bow-shaped projection in ventral view. Hmax at 2/5 anterior; Lmax at 1/3 ventral; Wmax median. Regularly convex dorsal margin, more arched in its posterior part. Clearly concave ventral margin. Ventral and dorsal margins almost parallel (carapace slightly slender posteriorly). Convex anterior margin, more arched in its dorsal part than in its ventral part. Regularly convex posterior margin. Anterior and posterior ends of the carapace well rounded. Anterior end of the carapace higher than the posterior one. Anterior part of the carapace higher than posterior one. Surface smooth.

Discussion. A very common species in Givetian deposits of Europe. The collected specimens show juveniles whose outline is different from adults, with a narrower posterior part. The high variability of the species described by Żbikowska (1983) was present in our material, with sometimes a more elongated or higher carapace, a more convex dorsal margin or a straighter ventral margin, a more or less arched carapace, and an anterior part more or less wide.

Occurrences. Lower to Upper Givetian (Hanonet, Trois-Fontaines, Terres d’Haurs, Mont d’Haurs Fms, and Fromelennes Fm, Flohimont and Moulin Boreux Mbs), Ardenne (Flohimont, Couvin, Jemelle, Glageon, Sourd d’Ave, Mont d’Haurs, Cul d’Houille and Aisne sections), Middle Givetian to Lower Frasnian (Candás Fm, mb B), Asturias (Peran-Perlora section); Givetian, Eifel; Middle Devonian, Bohemia, USA.