Anatomy of the “false thumb” of Tremarctos ornatus (Carnivora, Ursidae, Tremarctinae): phylogenetic and functional implications
DOI:
https://doi.org/10.3989/egeol.0662133Keywords:
Panda, radial sesamoid, Ursidae, Ailuridae, Anatomy, TremarctosAbstract
We describe for the first time the radial sesamoid or “false thumb” of the spectacled bear (Tremarctos ornatus), showing its great morphological similarities with that of the giant panda (Ailuropoda melanoleuca) and the differences with that of the rest of the Ursidae. This points to the existence of a common origin for this structure in both species, but considering the accepted phylogenies of ursids, the sharing of a “false thumb” in T. ornatus and A. melanoleuca would be a plesiomorphy for these groups, whereas in the rest of the ursids the radial sesamoid was probably reduced, lacking the specialised function that this bone has in Tremarctinae and Ailuropodinae.
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Antón, M., Salesa, M. J., Pastor, J. F., Peigné, S. and Morales, J. (2006). Implications of the Functional Anatomy of the Hand and Forearm of Ailurus fulgens (Carnivora, Ailuridae) for the Evolution of the “False-Thumb” in Pandas. J. Anatomy, 209: 757-764. doi:10.1111/j.1469-7580.2006.00649.x
Bininda-Emonds, O. R., Gittleman, J. L. and Purvis, A. (1999) Building large trees by combining phylogenetic information: a complete phylogeny of the extant Carnivora (Mammalia). Biol. Rev., 74: 143-175. doi:10.1017/S0006323199005307
Brown, G. (1993). The great bear almanac. Lyons and Burford, New York. 340 pp.
Chorn, J. and Hoffman, R. S. (1978). Ailuropoda melanoleuca. Mammalian Species, 110: 1-6. doi:10.2307/3503982
Davis, D. D. (1964). The Giant Panda. A Morphological Study of Evolutionary Mechanisms. Fieldiana: Zool. Mem., 3: 1-339.
Endo, H., Hayashi, Y., Yamagiwa, D., Kurohmaru, M., Koie, H., Yamaya, Y. and Kimura, J. (1999a). CT examination of the manipulation system in the giant panda (Ailuropoda melanoleuca). J. Anatomy, 195: 295-300. doi:10.1046/j.1469-7580.1999.19520295.x
Endo, H., Makita, T., Sasaki, M., Arishima, K., Yamamoto, M. and Hayashi, Y. (1999b). Comparative Anatomy of the Radial Sesamoid Bone in the Polar Bear (Ursus maritimus), the Brown Bear (Ursus arctos) and the Giant Panda (Ailuropoda melanoleuca). J. Vet. Med. Sci., 61: 903-907. doi:10.1292/jvms.61.903
Ewer, R. F. (1973). The Carnivores. Comstock Publishing Associates. 494 pp.
Flynn, J. J. and Nedbal, M. A. (1998). Phylogeny of the Carnivora (Mammalia): Congruente vs incompatibility among multiple data sets. Mol. Phylo. Evol., 9: 414-426. doi:10.1006/mpev.1998.0504
Flynn, J. J., Nedbal, M. A., Dragoo, J. W. and Honeycutt, R. L. (2000). Whence the Red Panda? Mol. Phylo. Evol., 17: 190-199. doi:10.1006/mpev.2000.0819
Flynn, J. J., Finarelli, J. A., Zehr, S., Hsu, J. and Nedbal, M. A. (2005). Molecular Phylogeny of the Carnivora (Mammalia): Assessing the Impact of Increased Sampling on Resolving Enigmatic Relationships. Syst. Biol., 54: 317-337. doi:10.1080/10635150590923326
Frick, C. (1926). The Hemicyoninae and an American Tertiary bear. Bull. Amer. Mus. Nat. Hist., 56: 1-119.
Gambaryan, P. P. (1974). How Mammals Run. Anatamical Adaptations. Hohn Wiley and Sons. New York, 367 pp.
Ginsburg, L. (1955). De la subdivision du genre Emisión Lartet (Carnassier du Miocène). Bull. Soc. Géol. France, 6e sér., 5: 85-99.
Ginsburg, L. (1999). Order Carnivora. In: The Miocene Land Mammals of Europe. (G. E. Rössner and K. Heissig, edit.) Pfeil, München, 109-148.
Ginsburg, L. and Morales, J. (1995). Zaragocyon daamsi n. gen. sp. nov., Ursidae primitif du Miocène inférieur d’Espagne. C. R. Acad. Sci. Paris, sér. IIa. 321: 811-815.
Gray, H. (1977). Anatomy, Descriptive and Surgical. Bounty Books, New York. 1257 pp.
Goldman, D., Rathna Giri, P. and O’Brien, S. J. (1989). Molecular Genetic-Distance Estimates Among The Ursidae as Indicated by One- and Two-Dimensional Protein Electrophoresis. Evolution, 43: 282-295. doi:10.2307/2409208
Hilderbrand, G. V., Farley, S. D., Robbins, C. T., Hanley, T. A., Titus, K. and Servheen, C. (1996). Use of stable isotopes to determine diets of living and extinct bears. Can. J. Zool., 74: 2080-2088. doi:10.1139/z96-236
Kurtén, B. (1966). Pleistocene bears of North America. 1. Genus Tremarctos, Spectacled bears. Acta Zool. Fennica, 115: 1-120.
Kurtén, B. (1967). Pleistocene bears of North America. 2. Genus Arctodus, short-faced bears. Acta Zool. Fennica, 117: 1-115.
Ledje, C. and Arnason, U. (1996). Phylogenetic analyses of complete cytochrome b genes of the order carnivore with particular emphasis on the Caniformia. J. Mol. Evol., 42: 135-144. doi:10.1007/BF02198839
Lotze, J. H. and Anderson, S. (1979). Procyon lotor. Mammalian Species, 119: 1-8. doi:10.2307/3503959
Matheus, P. E. (1997). Paleoecology and Ecomorphology of the Giant Short-Faced Bear in Eastern Beringia. Tesis doctoral. 282 pp.
McKenna. M. C. and Bell, S. K. (1997). Classification of Mammals Above the Species Level. Columbia University Press, New York. 631 pp.
McLellan, B. and Reiner, D. (1994). A review of bear evolution. Internacional Conference on Bear Resources and Management, 9: 85-96.
Paisley, S. and Garshelis, D. L. (2006). Activity patterns and time budgets of Andean bears (Tremarctos ornatus) in the Apolobamba Range of Bolivia. J. Zool., 268: 25-34.
Peyton, B. (1999). Spectacled Bear Conservation Actino Plan. In: Bears: Status Survey and Conservation Action Plan (C. Servheen, S. Herrero and B. Peyton, edit.) IUCN, 310 pp.
Ríos-Uzeda, B., Gómez, H. and Wallace, R. B. (2006). Habitat preference of the Andean bear (Tremarctos ornatus) in the Bolivian Andes. J. Zool., 268: 271-278. doi:10.1111/j.1469-7998.2005.00013.x
Roberts, M. S. and Gittleman, J. L. (1984). Ailurus fulgens. Mammalian Species, 222: 1-8. doi:10.2307/3503840
Salesa, M. J., Antón, M., Peigné, S. and Morales, J. (2006). Evidence of a false thumb in a fossil carnivore clarifies evolution of pandas. Proceedings of the National Academy of Sciences, 103: 379-382. doi:10.1073/pnas.0504899102
Talbot, S. L. and Shields, G. F. (1996). A Phylogeny of the Bears (Ursidae) Inferred from Complete Sequences of Three Mitochondrial Genes. Mol. Phylo. Evol., 5: 567-575. doi:10.1006/mpev.1996.0051
Waits, L. P., Sullivan, J., O’Brien, S. J. and Ward, R. H. (1999). Rapid Radiation Events in the Family Ursidae Indicated by Likelihood Phylogenetic Estimation from Multiple Fragments of mtDNA. Mol. Phylo. Evol., 13: 82-92. doi:10.1006/mpev.1999.0637
Welch, C. A., Keay, J., Kendall, K. C. and Robbins, C. T. (1997). Constraints on frugivory by bears. Ecology 78: 1105-1119.
Yu, L., Li, Q. W., Ryder, O. A. and Zhang, Y. P. (2004). Phylogeny of the bears (Ursidae) based on nuclear and mitochondrial genes. Mol. Phylo. Evol., 32: 480-494. doi:10.1016/j.ympev.2004.02.015
Zhang, Y. P. and Ryder, O. A. (1994). Phylogenetic Relationships of Bears (the Ursidae) Inferred from Mitochondrial DNA sequences. Mol. Phylo. Evol., 3: 351-359. doi:10.1006/mpev.1994.1041
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