Skeletal element within the mouth (or in some species, upper part of the digestive tract) that is composed of dentine and is used in procuring or masticating food.
Comment:
EDITOR_NOTE we place ZFA ctb 5 tooth here for now. Consider changing name from calcaeeous tooth. Note that sea cucumbers develop calcareous tooth-like structures; [homology-note] "The ancestor of recent vertebrate teeth was a tooth-like structure on the outer body surface of jawless fishes.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0001733", ontology="VHOG", source="PMID:19266065 Koussoulakou DS, Margaritis LH, Koussoulakos SL, A curriculum vitae of teeth: evolution, generation, regeneration. International Journal of Biological Sciences (2009)", source="http://bgee.unil.ch/"}; [taxon-note] "absent in living platypus, present in toothed Miocene platypus Obduron dicksoni" xsd:string {source="PMID:10210685"}