FIGURE 1 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland

FIGURE 1. Type specimens of Scottish Middle Devonian diplacanthids: 1, Diplacanthus crassisimus (Duff, 1842) holotype NMS G.1891.92.333, from Tynet Burn, Moray; 2, Rhadinacanthus longispinus (Agassiz, 1844) holotype NMS G.1953.4.3, from Cromarty, Ross and Cromarty; 3, Homacanthus borealis holotype spine NMS G.1892.91.1, from Lybster, Caithness; 4, Diplacanthus tenuistriatus (Traquair, 1894) syntype NMS G.1891.92.340, from Gamrie, Banffshire. Scale bars equal 1 cm.