Fig. 16
From: Roveacrinida (Crinoidea) from Late Triassic (early Carnian) black shales of Southwest China
Osteocrinus sinensis n. sp., Lower Xiaowa Formation, Xiaowa Village. Marlstone bed (a, c–f), shale (b). a–c, e–f Secundibrachials with mostly well-developed adoral spines near the spongy area at the muscular facet, MHI 1879/2/4, MHI 1879/6/4, MHI 1879/1/12, MHI 1879/1/9, MHI 1879/5/3; in b the two adoral spines are visible, MHI 1879/6/4. d Muscular articular facet of secundibrachial, arrows indicate muscle fossae below axial canal and large aboral ligament fossa, the adoral spines are also visible; MHI 1879/4/6. Scales 1 mm