FIGURE 5. 1 in A redescription of the three longest-known species of the acanthodian Cheiracanthus from the Middle Devonian of Scotland

FIGURE 5. 1, Site map indicating the most important localities in northern Scotland where Middle Devonian Cheiracanthus specimens have been collected, land in white, current shoreline in blue, alluvial plains in yellow, alluvial fans in ochre; main lake area in blue; 2, biostratigraphic table of Cheiracanthus species occurrences in the Orcadian Basin of northern Scotland. Modified from Burrow et al. (2016, figure 2).