Fig. 17
From: Roveacrinida (Crinoidea) from Late Triassic (early Carnian) black shales of Southwest China
Osteocrinus sinensis n. sp., Lower Xiaowa Formation, Wolonggong. Brachials on a slab, MHI 2137/3/2. Note the different facets, one compact with coarsely meshed stereom (at right), the other fine-meshed near the facet (at left); the ossicles are collapsed at about half their length. Away from the facets the stereom is imperforate. The very short adoral spines suggest that the ossicles may be primibrachials. SEM photograph Bonn. Scale 1 mm