Fig. 12

Adambulacral ossicles of fossil and extant korethrasterids and pterasterids. a, b, g, h, Hansaster trimbachensis (Gale 2011a). g, h, original of Gale (2011a, pl. 23, figs. 1, 2), holotype, NMB M 11,143. a, b NHMUK EE 16,586. c, d Becuaster fusiliformis gen. nov., sp. nov., NHMUK EE 16,587, holotype. i, j Propteraster amourensis gen. nov., sp. nov, NHMUK EE 16,588, holotype. k, l Savignaster wardi Gale, 2011a, adambulacral (original of Gale 2011a, pl. 23, figs. 11, 12), NHMUK EE 13,635. e, f Peribolaster lictor Fell, 1958. New Zealand. N, O, Pteraster temnochiton Fisher, 1910. Recent, Alaska. M, P, Pteraster coynetes Fisher, 1916. Recent, Phillippines. A, B, lower Oxfordian, Cardioceras bukowskii Subzone, basal Couches de Passage, Andelot-Morval, Jura, France, sample And 1–5 (Fig. 20a). c, d, i, j, lower Oxfordian, Cardioceras praecordatum Subzone, upper Marnes à C. renggeri, Andelot-Morval, Jura, France, sample And 9 (Fig. 20a). g, h Upper Oxfordian, Rumperl, southwest of Trimbach, near Olten, Canton Solothurn, Switzerland. Key; adadm, adamb–adamb muscle insertion; adexa, adamb extension articulation. adexm, adamb extension muscle. ads, adamb spine site. als, actinolateral spine site. aps, apertural spine site. Scale bars equal 1 mm (g, h) and 0.5 mm (a–f, j–p)