New cases of polyodontia in the dawn bat, Eonycteris spelaea(Mammalia: Chiroptera: Pteropodidae)
While working with the Prof. Abe’s collection, which is stored at the Hokkaido University (Sapporo), a specimen of the fruit bat Eonycteris spelaea (No. 56289) was discovered, possessing additional molars in all four tooth rows. Such type of polyodontia is not known for this species, and is extremely rare for Pteropodids as a whole. Also, we did not found any mention of cases where additional molars would develop simultaneously on the lower and upper jaws. Among the examined 25 specimens of Eonycteris spelaea, two cases of olygodontia (plus one, probably representing an artefact of metabolic disorders) and five cases of polyodontia were identified. For comparison, in a sample of 40 individuals of three different species of the genus Rousettus, not a single case of polyodontia was found.DOI: 10.15298/rusjtheriol.18.2.05
- Andersen K. 1912. Catalogue of the Chiroptera in the Collection of the British Museum. 2nd ed. Vol.1: Megachiroptera. London: British Museum (Natural History). 854 p.
- Freeman P.W. 1995. Nectarivorous feeding mechanisms in bats // Biological Journal of the Linnean Society. Vol.56. No.3. P.439–463.
- Giannini N.P. & Simmons N.B. 2007. Element homology and the evolution of dental formulae in Megachiropteran bats (Mammalia: Chiroptera: Pteropodidae) // American Museum Novitates. No.3559. P.1–27.
- Kirsch J.A.W. & Lapointe F.J. 1997. You aren’t (always) what you eat: evolution of nectar-feeding among Old-World fruitbats (Megachiroptera: Pteropodidae) // Givnish T.J. & Sitsma K.J. (eds.). Molecular Evolution and Adaptive Radiation. Cambridge: Cambridge University Press. P.313–331.
- Koopman K.F. 1994. Chiroptera: systematics. Handbook of Zoology. Vol.8: Mammalia. New York: Walter de Gruyter. 217 p.
- Koopman K.F. & MacIntyre G.T. 1980. Phylogenetic analysis of chiropteran dentition // Wilson D.E. & Gardner A.L. (eds.). Proceedings Fifth International Bat Research Conference. Lubbock: Texas Tech Press. P.279–288.
- Kruskop S.V. 2013. Bats of Vietnam. Checklist and an Identification Manual. 2nd ed. Biodiversity of Vietnam series. Moscow: KMK Scientific Press. 300 p.
- Lanza B., Riccucci M. & Funaioli U. 2008. An interesting case of polyodontia in Epomophorus wahlbergi, with a review of this dental anomaly in bats (Chiroptera) // Lynx, series nova. Vol.39 No.1. P.109–127.