in taxon develops from develops from composed primarily of hydroxylapatite Vertebrata <vertebrates> Dasypodidae Orycteropodidae enamel http://upload.wikimedia.org/wikipedia/commons/6/66/Enamelorgan11-17-05.jpg SCTID:362113009 BTO:0001844 VSAO:0000065 current classification under substance of tooth may be turned into taxon GCI (e.g. sharks have enamel in dermal denticles) enamel of tooth tooth enamel FMA:55629 A dentine-like hypermineralized substance that covers the tooth tip. Enamel's primary mineral is hydroxylapatite, which is a crystalline calcium phosphate. Unlike dentin and bone, enamel does not contain collagen. Instead, it has two unique classes of proteins called amelogenins and enamelins[WP]. MESH:D003743 UBERON:0001752 XAO:0004198 EMAPA:35303 Wikipedia:Enamel_organ enameloid Skeletal tissue that consists of an avascular, noncollagenous, hypermineralized matrix that is deposited by ameloblasts that are excluded from the matrix. Enamel develops from organic pre-enamel tissue that is replaced by a largely inorganic matrix.[VSAO] UMLS:C0011350 NCIT:C32505 enamel tissue CALOHA:TS-1057 MA:0002543 part_of tooth enamel organ in MA odontoid tissue pre-enamel mineralized skeletal tissue