Fig. 6From: Roveacrinida (Crinoidea) from Late Triassic (early Carnian) black shales of Southwest China Osteocrinus sinensis n. sp., Lower Xiaowa Formation, marlstone bed, Xiaowa Village. Holotype, MHI 1879/1/2. ae = aboral element; R = radial circlet; IBr1 = first primibrachial; IBr2 = second, axillary primibrachial; IIBr1 first secundibrachial. Note short adoral spine on first primibrachial (inset, arrow). Scales 1 mmBack to article page