Fig. 4

Juracantha hottingeri gen. et sp. nov. from the Late Oxfordian Bure Member of the Boncourt—Queue au Loup site. a–d QLP005-809 (holotype), proximal arm segments in lateral (a), dorsal (b) and ventral (c) views, and detail of lateral view exposing an arm spine fragment (d). e–g QLP005-810 (paratype), median arm segments in lateral (e), ventro-lateral (f) and dorsal (g) views. h–j Ophientrema scolopendrina (Lyman, 1883), Recent, off Tanabe, Kii Peninsula, Japan, 975–1,112 m, proximal lateral arm plate in external (h) and internal (i) views, and median lateral arm plate in external view (j). All scale bar specifications are in mm. Note that scale bars in Fig. 3a–c and e–g, respectively, are drawn to scale, but that this is not the case for the scale bars in h–j