Fig. 14 in Silicified Mississippian brachiopods from Muhua, southern China: Lingulids, craniids, strophomenids, productids, orthotetids, and orthids

Fig. 14. Productoid brachiopod Argentiproductus margaritaceus (Phillips, 1836) from the Muhua Formation. A. Small ventral valve, PKUM02−0278, in exterior (A1), interior (A2), lateral (A3), and posterior (A4) views. B. Shell, PKUM02−0279, in ventral (B1), dorsal (B2), lateral (B3), posterior (B4) views. C–F. Incomplete ventral valves, PKUM02−0280 (C), PKUM02−0281 (D), PKUM02−0282 (E), and PKUM02−0283 (F), in exterior (C1, D1, E1, F1) and interior (C2, D2, E2, F2) views showing well developed ear baffles. G. Incomplete dorsal valve, PKUM02−0284, in exterior (G1) and interior (G2) views. H. Large, almost complete shell, PKUM02−0285, in dorsal (H1), ventral (H2), lateral (H3), and posterior (H4) views; the ribbing in the middle of the ventral valve resembles ornamentation of Productina. Samples GB–GT.