Barroisella sp.

Halamski, Adam T. & Baliński, Andrzej, 2009, Latest Famennian brachiopods from Kowala, Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 54 (2), pp. 289-306 : 292

Barroisella sp.

Fig. 2A .

2007 Barroisella sp. ; Marynowski et al. 2007: 191, fig. 4.18.

Material.— 14 specimens from set K, ZPAL Bp 57/66–79 .

Description.—Shell up to 20 mm in length, elongate elliptical in outline, with distinct ventral pseudointerarea, elongated median ventral muscle scar, and narrow dorsal median ridge extending for about two−third of the valve length.

Remarks.—This brachiopod is usually represented by disarticulated valves; nonetheless, the occurrence of bivalved specimens with slightly displaced valves ( Fig. 2A ) is noteworthy. The disposition of muscle scars in both valves suggests that the specimens are referable to the genus Barroisella . This form was reported from the middle Famennian set J by Marynowski et al. (2007).

Figures

Fig. 2. Middle to Latest Famennian brachiopods from Kowala. A. Barroisella sp. The bivalved specimen ZPAL Bp 57/70a showing strongly exfoliated ventral valve (ventral internal mould) and interior of dorsal valve (lower right) (A1) and its counterpart ZPAL Bp 57/70b (A2); enlargement of the posterior region of the ventral valve showing pseudointerarea and elongated median muscle scar (A3). B–E. Aulacella interlineata (Sowerby, 1840). B–D. Three shells ZPAL Bp 57/4a, 4b, and 86, respectively, in dorsal (B1, C1, D1) and ventral (B2, C2, D2) views showing variability in the shell outline. E. Dorsal valve ZPAL Bp 57/5 exterior (E1) and interior (E2). F, H, I. Schellwienella pauli (Gallwitz, 1932). F. Slightly destroyed shell ZPAL Bp 57/20 in dorsal (F1), ventral (F2), lateral (F3), posterior (F4), and anterior (F5) views. H. Limestone block ZPAL Bp 57/103 with accumulation of shells of S. pauli. I. Interior of ventral valve ZPAL Bp 57/100. G. Productida indet., mould ZPAL Bp 57/7 of exfoliated dorsal valve. J. Productida indet. Posterior view of mostly decorticated and slightly crushed dorsal valve ZPAL Bp 57/8. K. Mesoplica sp. Ventral valve ZPAL Bp 57/1 in ventral (K1) and posterior (K2) views. Scale bars 5 mm.