Voiseyella bruntoni Baliński and Sun, 2010a

Sun, Yuanlin & Baliński, Andrzej, 2011, Silicified Mississippian brachiopods from Muhua, southern China: Rhynchonellides, athyridides, spiriferides, spiriferinides, and terebratulides, Acta Palaeontologica Polonica 56 (4), pp. 793-842 : 829

Voiseyella bruntoni Baliński and Sun, 2010a

Fig. 27A–F .

2010 Voiseyella bruntoni sp. nov.; Baliński and Sun 2010a: 93–96, figs. 2, 3.

Material.—Four complete and 14 damaged ventral valves, 4 complete and 22 damaged dorsal valves from sample MH 1.

Remarks.—This species has been recently described and discussed in detail by Baliński and Sun (2010a). It differs from all other species of the genus in having an exceptionally transverse, fusiform outline and a characteristically shaped fold and sulcus. The ventral sulcus is narrow, deep, and V−shaped in cross section ( Fig. 27D, E ), but frequently shallows anteriorly in large specimens. Dorsal fold is distinct, initially appearing as a single costa which bifurcates early within 1–2 mm of the umbo and thus forms two very strong costae divided by a deep median groove ( Fig. 27A–C, F ). Each flank of the shell is ornamented by 6 to 14 wide and simple radial costae which diminish in size and strength laterally and commonly disappear completely towards the lateral extremities.

Stratigraphic and geographic range.—Known exclusively from the type locality and horizon.

Figures

Fig. 27. Strophopleurid brachiopods from the Tornaisian Muhua Formation, southern China. A–F. Voiseyella bruntoni Baliński and Sun, 2010a. A. Incomplete dorsal valve, PKUM02−0527, in exterior (A1) and interior (A2) views. B. Incomplete dorsal valve, PKUM02−0528, in exterior (B1) and posterior (B2) views. C. Slightly damaged dorsal valve, PKUM02−0529, showing exterior (C1) and enlargement of cardinalia (C2). D. Incomplete ventral valve, PKUM02−0530, in exterior (D1) and interior (D2) views. E. Incomplete ventral valve, PKUM02−0531, in exterior (E1) and posterior (E2) views. F. Almost complete dorsal valve, PKUM02−0532, in exterior (F1), interior (F2), lateral (F3), posterior (F4), and anterior (F5) views. G–J. Voiseyella cf. texana (Carter, 1967). G, H. Two incomplete dorsal valves, PKUM02−0533 (G) and PKUM02−0534 (H), in exterior (G1, H1) and interior (G2, H2) views and enlargement of the interior showing cardinalia (G3). I. Exterior of ventral valve, PKUM02−0535. J. Incomplete ventral valve, PKUM02−0536, in exterior (J1), interior (J2), anterior (J3), and posterior (J4) views, and enlargement showing external micro−ornamentation (J5). Sample MH1 (A–F), GB (G, H, J), and GT (I).