Lower Devonian acanthodians from New South Wales 
335 
Figure 4 Tooth whorls from Trundle beds, central New South Wales. A, occlusal view, ischnacanthid symphysial 
tooth whorl MMMC02249; B,C, symphysial tooth whorl MMMC02256, with main central cusp ca. four 
times as high as side cusps: B, antero-lateral view, showing arched base, and C, occluso-lateral view; D, 
lateral view, and E, occlusal view of ?mouth cavity multiple tooth whorl MMMC02250; F, lateral view of 
denticulated plate plus tooth whorl MMMC02251; G, occluso-lateral view of symmetrical tooth whorl 
MMMC01962. dp = denticulated plate, tr = tooth rows, tw = tooth whorl. Scale bars = 0.1 mm; arrow 
indicates rostral direction; Figures A,D,E are SEM photographs of uncoated specimens. 
