Fig. 10

Mouth frame (oral, circumoral, odontophore), chevron ossicles and primary interradials of fossil and extant pterasterids. a, b Oral ossicle of Propteraster amourensis gen. nov., sp. nov., paratype, NHMUK EE 16,577, in radial a and interradial b views. c–e, i, j, m, o–q, s, t, Hansaster trimbachensis (Gale 2011a). c–e, odontophore in distal c, proximal e and actinal d aspects, NHMUK EE 16,578. i, j Oral ossicle in radial i and interradial j views. NHMUK EE 16,579. M, N, Q, T, chevron ossicles, abactinal aspect. NHMUK EE 16,580-3. p, s Primary interradial ossicles, actinal p and abactinal s aspects. NHMUK EE 16,584-5. f–h, k, l, n, r Pteraster coynetes Fisher, 1916. Recent, Phillippines. f–h Odontophore, same views as H. trimbachensis. k, l Oral ossicle in radial k and interradial l aspects. n, r chevron plates, abactinal views. a, b Lower Oxfordian, Cardioceras praecordatum Subzone, upper Marnes à C. renggeri, Andelot-Morval, Jura, France, sample And 9 (Fig. 20a). c–e, i, j, m, o, p, q, s, t, lower Oxfordian, Cardioceras bukowskii Subzone, basal Couches de Passage, Andelot-Morval, Jura, France, sample And1-5 (Fig. 20a). Scale bars equal 0.5 mm (c–e, i–n, p–r) and 0.2 mm (a, b, f–h, o, p, s, t)