Lower Devonian acanthodians from New South Wales 
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Figure 6 Ground thin sections of dental elements from the Trundle beds, central New South Wales. A, vertical 
transverse section of dentigerous jaw bone fragment MMMC02276; B, vertical longitudinal section through 
the main cusp and three side cusps of jaw bone fragment MMMC02274; C, vertical longitudinal section of 
symphysial tooth whorl MMMC02275; D, SEM photograph of uncoated denticulated plate with tooth whorl 
MMMC02205; E, longitudinal section of plate in D. bcl = bone cell lacunae, c = side or secondary cusps, d = 
denteon, dp = denticulated plate, me = main cusp, o = orthodentine, pc = 'pulp' canal, r = lateral ridge of 
main cusp, t = tubercle of medial ridge, tw = tooth whorl, vc = vascular canal. Scale bars = 0.1 mm; arrow 
indicates rostral direction. 
