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Fig. 12 | Zoological Letters

Fig. 12

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. 12

Harriotta raleighana (Rhinochimeridae; Holocephali; Chondrichthyes). Calcium (Ca) density profiles relative to HAP standard, on virtual sections in μCT, adult lower plate. Density profiles measured in Humboldt units (HU), blue graphs, left. a–d virtual sections through dental plate, density measured along red line from oral to aboral. a rostral labial set of ovoids (ov), hypermineralized dentine (HD) from oral high density to aboral no density. b profile through adjacent sclerotic dentine (sod) is half numerical density value of HD, lowest in trabecular dentine (td) aborally. c labial caudal ovoids including many unmineralized ovoid shapes, with very low values for relative density, adjacent to mineralized tritor (tri). d profile of tritoral HD with developing aboral tritor with low HU values and sudden change to higher ones. All regions with hypermineralized dentine have the same values for relative Ca density

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Zoological Letters

ISSN: 2056-306X

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