FIGURE 16 in A redescription of the three longest-known species of the acanthodian Cheiracanthus from the Middle Devonian of Scotland

FIGURE 16. Cheiracanthus grandispinus head and branchial region, histology. 1-3, NMS G.2019.9.8: 1, 2, NMS G.2019.9.8.8 series of endoskeletal branchial rays, some showing gill raker projections; 3, NMS G.2019.9.8.14 calcified cartilage blocks; 4, NMS G.2019.9.35.1, calcified cartilage of Meckel's cartilage? Scale bars equal 0.1 mm. gb, gill bars; gbp, gill bar projections; gcc, globular calcified cartilage; s, scale.