Inferring parrotfish (Teleostei : Scaridae) pharyngeal mill function from dental morphology, wear, and microstructure

Carr, A., Tibbetts, I. R., Kemp, A., Truss, R. and Drennan, J. (2006) Inferring parrotfish (Teleostei : Scaridae) pharyngeal mill function from dental morphology, wear, and microstructure. Journal of Morphology, 267 10: 1147-1156. doi:10.1002/jmor.10457


Author Carr, A.
Tibbetts, I. R.
Kemp, A.
Truss, R.
Drennan, J.
Title Inferring parrotfish (Teleostei : Scaridae) pharyngeal mill function from dental morphology, wear, and microstructure
Journal name Journal of Morphology   Check publisher's open access policy
ISSN 0362-2525
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1002/jmor.10457
Volume 267
Issue 10
Start page 1147
End page 1156
Total pages 10
Editor Frederick W Harrison
Place of publication USA
Publisher John Wiley & Sons, Inc.
Language eng
Subject C1
279900 Other Biological Sciences
630300 Fish
Abstract Morphology, occlusal surface topography, macrowear, and microwear features of parrotfish pharyngeal teeth were investigated to relate microstructural characteristics to the function of the pharyngeal mill using scanning electron microscopy of whole and sectioned pharyngeal jaws and teeth. Pharyngeal tooth migration is anterior in the lower jaw (fifth ceratobranchial) and posterior in the upper jaw (paired third pharyngobranchials), making the interaction of occlusal surfaces and wear-generating forces complex. The extent of wear can be used to define three regions through which teeth migrate: a region containing newly erupted teeth showing little or no wear; a midregion in which the apical enameloid is swiftly worn; and a region containing teeth with only basal enameloid remaining, which shows low to moderate wear. The shape of the occlusal surface alters as the teeth progress along the pharyngeal jaw, generating conditions that appear suited to the reduction of coral particles. It is likely that the interaction between these particles and algal cells during the process of the rendering of the former is responsible for the rupture of the latter, with the consequent liberation of cell contents from which parrotfish obtain their nutrients.
Keyword Anatomy & Morphology
Pharyngeal Jaw Apparatus
Microwear
Grinding
Tooth Wear
Dentine
Enameloid
Great-barrier-reef
Secondary Metabolites
Labrid Fishes
Jaw Apparatus
Enamel
Diversity
Australia
Patterns
Sordidus
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 20:46:03 EST