Fig. 25 in Silicified Mississippian brachiopods from Muhua, southern China: Rhynchonellides, athyridides, spiriferides, spiriferinides, and terebratulides

Fig. 25. Martinid brachiopod Merospirifer sp. from the Tornaisian Muhua Formation, southern China. A. Fragment of ventral valve, PKUM02−0512, in exterior (A1), interior (A2), posterior (A3), posterodorsal (A4), and lateral (A5) views, and enlargement of the surface exopunctate micro−ornamentation (A6). B. Fragment of dorsal valve, PKUM02−0513, in exterior (B1) and interior (B2) views, and enlargement of the interior showing cardinalia (B3). C. Fragment of ventral valve, PKUM02−0514, viewed from the interior showing subparallel, thin dental plates. D. Incomplete ventral valve, PKUM02− 0515, in inclined interior (D1), lateral (D2), posterior (D3), and interior (D4) views. Samples MH1 (A), M2–8 (B, C), and MH2 (D). Scale bars 2 mm.