Fig. 19. Productidines from the Muhua Formation. A–F in Silicified Mississippian brachiopods from Muhua, southern China: Lingulids, craniids, strophomenids, productids, orthotetids, and orthids

Fig. 19. Productidines from the Muhua Formation. A–F. Semicostellini gen. et sp. indet. A, B, F. Incomplete dorsal valves, PKUM02−0291 (A), PKUM02−0292 (B), and PKUM02−293 (F), in exterior (A1, B1, F1) and interior (A2, B2, F2,) views. C–E. Fragments of ventral valves, PKUM02−0294 (C), PKUM02−0295 (D), and PKUM02−0296 (E), in exterior view. G. Strophalosiidina gen. et sp. indet., incomplete ventral valve, PKUM02−0297, in exterior (G1), interior (G2), and posterior (G3) views, and SEM enlargement of G2 showing rudimentary teeth (G3). H–J. Acanthocosta sp. H, I. Incomplete dorsal valves, PKUM02−0298 (H) and PKUM02−0299 (I), in exterior (H1, I1) and interior (H2, I2) views. C. Fragment of ventral valve, PKUM02−0300, showing external ornamentation. K, M. Spinocarinifera? sp.; incomplete dorsal valves, PKUM02−0301 (K) and PKUM02−0302(M), in exterior (K1, M1), interior (K2, M2), and enlarged posterior (K3) views. L. Orbinaria? sp.; fragmented dorsal valve, PKUM02−0303, in exterior (L1), interior (L2), and enlarged interior (L3) views. N. Auriculispininae gen. et sp. indet., probably belonging to Undaria Muir−Wood and Cooper, 1960; ventral valve, PKUM02−0304, in exterior (N1), lateral (N2), and anterior (N3) views. O, P. Echinoconchoidea gen. et sp. indet.; fragments of ventral valve, PKUM02−0305 (O) and dorsal valve, PKUM02−0306 (P), showing external ornamentation. Q. Juresaniinae gen. et sp. indet., incomplete dorsal valve, PKUM02−0307, in exterior (Q1) and interior (Q2) views. R. Productininae gen. et sp. indet.; fragment of dorsal valve, PKUM02−0308, probably representing Avonia Thomas, 1914 or Overtonia Thomas, 1914. Samples M2−8 (A–J), GB−GT (K–M, O–R), and MH1 (N). Scale bars 2 mm.