FIGURE 24 in A redescription of the three longest-known species of the acanthodian Cheiracanthus from the Middle Devonian of Scotland

FIGURE 24. Cheiracanthus latus head and branchial region, morphology. 1-2, NHM PV P 3253 from Tynet Burn. 3, NMS G.1891.92.320 from Gamrie. 4, NHMUK PVP43273 from Tynet Burn, branchial region with ridges visible on lowest branchiostegal plates. Abbreviations: br.l, left branchiostegal plates; br.r, right branchiostegal plates; cop, circumorbital plate; gr, gular rays; Mc.l, left Meckel's cartilage; Mc.r, right Meckel's cartilage; pect.fs, pectoral fin spines; pq.l, mineralised cartilage along ventral edge of left palatoquadrate; proc, procoracoid; sc, scapulocoracoids; tess, head tesserae. Scale bars equal 10 mm.