Heterodont: Difference between revisions
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{{For|the subclass of bivalve molluscs|Heterodonta}} |
{{For|the subclass of bivalve molluscs|Heterodonta}} |
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[[File:Tooth shape changes within the jaw (heterodont - homodont).jpg|thumb|Tooth shape changes within the jaw (homodont to heterodont). [[Scanning electron microscope|SEMs]] of adult lower jaws. (A) Homodont unicuspid snake, Python molurus, (B) homodont gecko, Paroedura picta, (C) homodont tricuspid Monitor lizard, Varanus niloticus, (D) heterodont [[anole]], Anolis allisoni. (D′) Tricuspid teeth of the posterior jaw at the back of the mouth. (D″) [[Unicuspid]] teeth of the anterior jaw at the front of the mouth. Scale bar = 1 mm (A–D) and 200 |
[[File:Tooth shape changes within the jaw (heterodont - homodont).jpg|thumb|Tooth shape changes within the jaw (homodont to heterodont). [[Scanning electron microscope|SEMs]] of adult lower jaws. (A) Homodont unicuspid snake, Python molurus, (B) homodont gecko, Paroedura picta, (C) homodont tricuspid Monitor lizard, Varanus niloticus, (D) heterodont [[anole]], Anolis allisoni. (D′) Tricuspid teeth of the posterior jaw at the back of the mouth. (D″) [[Unicuspid]] teeth of the anterior jaw at the front of the mouth. Scale bar = 1 mm (A–D) and 200 |
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In [[anatomy]], a '''heterodont''' (from [[Ancient Greek|Greek]], meaning "different teeth") is an [[animal]] which possesses more than a single tooth [[morphology (biology)|morphology]].<ref name=Earth>{{cite book|title=A Dictionary of Earth Sciences|publisher= Encyclopedia.com|url=http://www.encyclopedia.com/plants-and-animals/zoology-and-veterinary-medicine/zoology-general/heterodont|date=10 October 2017}}</ref><ref>{{cite web|title=Dentition in Mammals: Definition, Origin, Types and Unusual Teeth in Mammals|url=http://www.biologydiscussion.com/zoology/mammals/dentition-in-mammals-definition-origin-types-and-unusual-teeth-in-mammals/41558|access-date=10 October 2017|last=Tanika|first=M}}</ref> For example, members of the [[Synapsida]] generally possess [[incisor]]s, [[Canine (tooth)|canines]] ("eyeteeth"), [[premolar]]s, and [[molars]]. The presence of heterodont [[dentition]] is evidence of some degree of feeding and or hunting specialization in a [[species]]. In contrast, homodont dentition refers to a set of teeth that possess the same tooth morphology. |
In [[anatomy]], a '''heterodont''' (from [[Ancient Greek|Greek]], meaning "different teeth") is an [[animal]] which possesses more than a single tooth [[morphology (biology)|morphology]].<ref name=Earth>{{cite book|title=A Dictionary of Earth Sciences|publisher= Encyclopedia.com|url=http://www.encyclopedia.com/plants-and-animals/zoology-and-veterinary-medicine/zoology-general/heterodont|date=10 October 2017}}</ref><ref>{{cite web|title=Dentition in Mammals: Definition, Origin, Types and Unusual Teeth in Mammals|url=http://www.biologydiscussion.com/zoology/mammals/dentition-in-mammals-definition-origin-types-and-unusual-teeth-in-mammals/41558|access-date=10 October 2017|last=Tanika|first=M}}</ref> For example, members of the [[Synapsida]] generally possess [[incisor]]s, [[Canine (tooth)|canines]] ("eyeteeth"), [[premolar]]s, and [[molars]]. The presence of heterodont [[dentition]] is evidence of some degree of feeding and or hunting specialization in a [[species]]. In contrast, homodont dentition refers to a set of teeth that possess the same tooth morphology. |
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Revision as of 20:55, 6 April 2019
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In anatomy, a heterodont (from Greek, meaning "different teeth") is an animal which possesses more than a single tooth morphology.[2][3] For example, members of the Synapsida generally possess incisors, canines ("eyeteeth"), premolars, and molars. The presence of heterodont dentition is evidence of some degree of feeding and or hunting specialization in a species. In contrast, homodont dentition refers to a set of teeth that possess the same tooth morphology.
In invertebrates, the term heterodont refers to a condition where teeth of differing sizes occur in the hinge plate, a part of the Bivalvia.[2] In vertebrates, however, heterodont pertains to animals where teeth are differentiated into different forms such as incisors, canines, premolars, and molars.
References
- ^ Zahradnicek, Oldrich; Buchtova, Marcela; Dosedelova, Hana; Tucker, Abigail S. (2014). "The development of complex tooth shape in reptiles". Frontiers in Physiology. 5. doi:10.3389/fphys.2014.00074. PMC 3933779.
{{cite journal}}: CS1 maint: unflagged free DOI (link)
Material was copied from this source, which is available under a Creative Commons Attribution-ShareAlike 3.0 Unported license.
- ^ a b A Dictionary of Earth Sciences. Encyclopedia.com. 10 October 2017.
- ^ Tanika, M. "Dentition in Mammals: Definition, Origin, Types and Unusual Teeth in Mammals". Retrieved 10 October 2017.
See also
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