Fig. 20 in Silicified Mississippian brachiopods from Muhua, southern China: Rhynchonellides, athyridides, spiriferides, spiriferinides, and terebratulides

Fig. 20. Palaeochoristitid brachiopod Palaeochoristites cinctus (Keyserling, 1846) from the Tornaisian Muhua Formation, southern China. A. Complete young shell, PKUM02−0477, in dorsal (A1), ventral (A2), lateral (A3), posterior (A4), and anterior (A5) views. B. Ventral valve, PKUM02−0478, viewed from the exterior (B1), interior (B2), and posterior (B3). C. Dorsal valve, PKUM02−0479, in exterior (C1) and interior (C2) views. D. Dorsal valve, PKUM02−0480, in exterior (D1), interior (D2), and the same inclined anteriorly (D3) views. E. Interior of incomplete dorsal valve, PKUM02−0481, in general (E1), and enlarged (E2) views showing cardinalia with crural plates. F. Ventral valve, PKUM02−0482, in exterior (F1) and interior (F2) views. G. Detail of external ornamentation, dorsal valve, PKUM02−0483. All from sample MH1.