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Fig. 17 | Zoological Letters

Fig. 17

From: Growth and mineralogy in dental plates of the holocephalan Harriotta raleighana (Chondrichthyes): novel dentine and conserved patterning combine to create a unique chondrichthyan dentition

Fig. 17

Harriotta raleighana (Rhinochimeridae; Holocephali; Chondrichthyes). Adult μCT adult jaws with dental plates rendered in situ with virtual sections. a skull in rostrolateral view showing upper and lower dental plates. b virtual frontal section, through cartilages of upper and lower jaws, showing positions of hypermineralized dentine (eg., tritor, tri) within trabecular dentine (td), along with developing spaces for tritor and ovoids (eg., ov.s). c upper dental plates (rostral and caudal pairs) in a horizontal plane showing developing regions of ovoids (ov) and worn oral surface and tritors (tri) within trabecular dentine. d lower jaw, both plates in oblique frontal section, with ovoids only, through rostro-dorsal part showing development of new ovoid spaces within the trabecular dentine (asterisk) and hypermineralisation towards the oral, biting surface. e oblique frontal section through more caudal region of lower dental plates, new ovoids along with tritor developing within the trabecular dentine (asterisk), with circumvascular dentine late to mineralize (white arrows), and mineralization towards the oral surface (HD(tri)). Scale bar A = 1 cm, B, C = 0 .5cm; D, E = 0.25 cm

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Zoological Letters

ISSN: 2056-306X

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