Bibliography Record
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Goulbourne, Lyle; Gonzalez-Socoloske, Daniel; Domning, Daryl P.
(detail)
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2022 |
Interspecific and Intergenerational Differences in the Molar Occlusal Surfaces of Manatees (Trichechidae).
–Abstract: One of the most unique features of manatees (Trichechus spp.) are their teeth, which are perfectly made to combat their abrasive diet by continuously being replaced along a horizontal axis, with new teeth added at the posterior end and older teeth falling out at the anterior end throughout their lifetime. While much is known regarding limitless horizontal replacement of manatee teeth, the morphology, topography, and enamel structure of the teeth have not been formally described, nor have interspecific differences in relative tooth size been described in detail. To physically describe the teeth, photographs of the molars from Florida manatees (T. manatus latirostris) and Amazonian manatees (T. inunguis) were taken and analyzed. Analysis included formal description and identification of the cusps and lophs/ridges of the molars. To address relative tooth size differences, the area of the posterior-most molar in occlusion was measured from both the upper and lower molars of the manatee skulls from each taxon in our collection. Florida manatees had significantly larger teeth than Amazonian both absolutely (t(87) = 10.2, p < 0.05) and relatively (t(87) = 8.8, p < 0.05). The relative comparison was achieved by comparing ratios of condylobasal length over tooth area.
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Related Index Records (3)
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Tooth Replacement
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2022 |
Goulbourne, Lyle; Gonzalez-Socoloske, Daniel; & Domning, Daryl P. |
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Trichechus inunguis (Natterer in von Pelzeln, 1883) Thomas and Lydekker, 1897
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2022 |
Goulbourne, Lyle; Gonzalez-Socoloske, Daniel; & Domning, Daryl P. |
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Trichechus manatus latirostris (Harlan, 1824) Hatt, 1934
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2022 |
Goulbourne, Lyle; Gonzalez-Socoloske, Daniel; & Domning, Daryl P. |
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