FIGURE 31. Rhadinacanthus longispinus NHM P.4041 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland

FIGURE 31. Rhadinacanthus longispinus NHM P.4041, from Gamrie, Banffshire, shoulder girdles; 1, 2, pectoral region and head on the part (anterior to right); 3, magnified view of the impression of the admedian spine; 4, 5, pectoral region and head on the counterpart (anterior to left). Scale bars equal 1 cm. Abbreviations: adm.s=admedian spine; ck.p=cheek plate; co.p=circumorbital plate; cor/adm.s=coracoid attached to base of admedian spine; lt.sc=left scapula; lt.p.fs= left pectoral fin spine; oc.p=occlusal plate; p.p=pinnal plate; rt.p.fs=right pectoral fin spine; rt.sc=right scapula; v.p=ventral plate.