Fig. 23 in Silicified Mississippian brachiopods from Muhua, southern China: Rhynchonellides, athyridides, spiriferides, spiriferinides, and terebratulides

Fig. 23. Ambocoeliid brachiopod Crurithyris cf. nastus Brunton and Champion, 1974 from the Tornaisian Muhua Formation, southern China. A. Complete shell PKUM02−0496 in dorsal (A1), ventral (A2), lateral (A3), and posterior (A4) views. B. Small ventral valve, PKUM02−0497, in interior (B1), lateral (B2), and posterior (B3) views. C, D. Interior of two dorsal valves (C, D1) and enlarged view of cardinalia (D2), PKUM02−0498 (C) and PKUM02−0499 (D). E. Interior of very small ventral valve, PKUM02−0500. F. Anterior view of ventral valve, PKUM02−0501, exterior showing spinose micro−ornamentation. G. Interior of ventral valve (G1) and enlargement of the umbonal region (G2), PKUM02−0502. H. Enlargement of the interior of dorsal valve, PKUM02−0503, showing cardinalia and muscle scars. I. Stereomicrographs of shell, PKUM02−0504, in dorsal view with much of the dorsal valve removed showing crura and the beginning of the spiralium; another small dorsal valve is seen deep behind crura. A–G, I, SEM micrographs. All from sample MH1.