Fig. 6 in Silicified Mississippian brachiopods from Muhua, southern China: Lingulids, craniids, strophomenids, productids, orthotetids, and orthids

Fig. 6. Craniidae gen. et sp. indet. from the Muhua Formation. A. Dorsal valve, PKUM02−0205, in exterior (A1), lateral (A2), posterior (A3), and interior (A4) views, and enlargements of the internal surface of the same specimen (A5, A6) showing poorly preserved shell punctation (arrowed). B, D. Dorsal valves, PKUM02−0206 (B) and PKUM02−0207(D), in lateral (B1, D1) and dorsal (B2, D2) views. C. Dorsal valve, PKUM02−0208, in exterior view. Sample MH1.