ESM Figure S4 Palaeospondylus gunni, Achanarras Quarry (Devonian), Scotland. from Questioning hagfish affinities of the enigmatic Devonian vertebrate Palaeospondylus

Line drawing, ventrolateral view of chondrocranium. Black asterisk indicates position of jugular canal. Abbreviations: As in Figures 1, 2, S1, S2.