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Boletín de la Sociedad Geológica Mexicana Volumen 73, núm. 1, A100720, 2021 |
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A new record of Paramylodon harlani (Owen 1840) (Xenarthra, Pilosa, Mylodontidae) from the late Pleistocene of Valsequillo, Puebla, with comments on its paleobiogeography and paleoecology in Mexico
Nuevo registro de Paramylodon harlani (Owen 1840) (Xenarthra, Pilosa, Mylodontidae) del Pleistoceno tardío de Valsequillo, Puebla, con comentarios sobre su paleogeografía y paleoecología en México
Gerardo Carbot-Chanona1,*, Eduardo Jiménez-Hidalgo2, Francisco J. Jiménez-Moreno3,Enrique Benítez-Gálvez4
1 Museo de Paleontología “Eliseo Palacios Aguilera”, Dirección de Paleontología, Secretaría de Medio Ambiente e Historia Natural. Calzada de Las Personas Ilustres s/n, Tuxtla Gutiérrez, Chiapas, Mexico.
2 Laboratorio de Paleobiología, Instituto de Recursos, Campus Puerto Escondido, Universidad del Mar. Ciudad Universitaria Puerto Escondido, 71985, Oaxaca, Mexico.
3 Universidad Angelópolis, Calle 3 Ote. 1603, Colonia Azcarate, 72000, Puebla, Puebla.
4 Independent researcher. Puebla de Zaragoza, Puebla, Mexico.
* Corresponding author: (G. Carbot-Chanona) This email address is being protected from spambots. You need JavaScript enabled to view it.
How to cite this article:
Carbot-Chanona,G.,Jiménez-Hidalgo, E.,Jiménez-Moreno,F.J.,Benítez-Gálvez, E., 2021, A new record of Paramylodon harlani (Owen 1840) (Xenarthra, Pilosa, Mylodontidae) from the late Pleistocene of Valsequillo, Puebla, with comments on its paleobiogeography and paleoecology in Mexico: Boletín de la Sociedad Geológica Mexicana, 73 (1), A100720. http://dx.doi.org/10.18268/BSGM2021v73n1a100720
ABSTRACT
Paramylodon harlani was a large ground sloth recorded across North America, from Canada to Mexico. In Mexico, it is known from several late Pleistocene localities, but most of these records just mention the taxon in passing and few specimens have been described or illustrated. In this work, we describe a left tibia from the Valsequillo Basin, Puebla state. Its morphology and measurements allowed us to identify it as Paramylodon harlani, adding a new record for Mexico. In Mexico, P. harlani occurred mainly in the Trans-Mexican Volcanic Belt, central Mexico, with some records in the north and southeastern part of the country. Most localities are located between 1500 to 2000 m.a.s.l. Paleoenvironmental and paleoclimatic inference in some localities of Mexico where P. harlani occurred, showed heterogenous vegetation dominated by grasslands, and agree with the preferred habitat proposed for this species based on localities in the United States. This indicates that P. harlani could inhabit different environments, from grasslands to more wooded areas, and this adaptation allowed it to extend its range from the north to the southeast of Mexico.
Keywords: Paramylodon, Quaternary, late Pleistocene, biogeographic corridors, habitat.
