Pugnaria plana Biernat and Racki, 1986

Halamski, Adam T. & Baliński, Andrzej, 2009, Latest Famennian brachiopods from Kowala, Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 54 (2), pp. 289-306 : 297

Pugnaria plana Biernat and Racki, 1986

Figs. 3D–E, 5 .

1986 Pugnaria plana gen. et sp. nov.; Biernat and Racki 1986a: 95–97;

text−figs. 2, 5–7, pls. 38, 39, 44: 2a–g, 45. 1986 Pugnaria plana Biernat and Racki ; Biernat and Racki 1986b: fig.

1C, pl. 1: 5, 6. 1988 Pugnaria plana Biernat and Racki ; Biernat 1988: 329, pl. 1: 3. 2007 Pugnaria plana (Biernat and Racki) ; Marynowski et al. 2007:

191, fig. 4.17a, b.

Material.— Seven specimens: 5 from set L, ZPAL Bp 57/24– 27, 31; 2 from set K, ZPAL Bp 57/58–59 .

Description.—Exterior, see Biernat and Racki (1986a).

Ventral interior without dental plates although very small dental nuclei are observed in both sectioned specimens ( Fig. 5A , distance 0.9–1.7; Fig. 5B , distance 1.2–1.3). Teeth stout and short. Dorsal interior without median septum; hinge plates short, nearly horizontal, divided; crural bases well marked, crura crescent−shape in cross−section proximally, more triangular and dorsally concave at distal ends, slightly divergent and curved ventrally ( Fig. 5A, B ).

Remarks.—Although the shell serial sections were illustrated by Biernat and Racki (1986a: pls. 44: 2, 45), they are quite difficult to analyse as they are shown in photographs only. Here, we illustrate the sections of two shells by camera lucida drawings ( Fig. 5A, B ).

Stratigraphic and geographic distribution.—This species, known solely from the Kowala section, was described by Biernat and Racki (1986a) from set K, subsequently reported by Marynowski et al. (2007) from set J, and now has been found in set L.

Figures

Fig. 5. Transverse serial sections of Pugnaria plana Biernat and Racki, 1986 through shells ZPAL Bp 31/107 (A) and ZPAL Bp 31/154 (B) from Kowala, sets J–K. Numbers indicate distances in mm from ventral umbo.