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Panbiogeography of the Santa María Amajac area, Hidalgo, Mexico

The Santa María Amajac paleolake is located in the central portion of Hidalgo, Mexico. Twenty-seven fossil taxa of aquatic and terrestrial plants, gastropods, ostracods, amphibians, and mammals identified previously in the area of the paleolake were selected and their distribution in America during...

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Bibliographic Details
Published in:Revista mexicana de biodiversidad 2014-12, Vol.85 (4), p.1228-1234
Main Authors: Palma-Ramírez, Arturo, Goyenechea, Irene, Castillo-Cerón, Jesús M.
Format: Article
Language:English
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Summary:The Santa María Amajac paleolake is located in the central portion of Hidalgo, Mexico. Twenty-seven fossil taxa of aquatic and terrestrial plants, gastropods, ostracods, amphibians, and mammals identified previously in the area of the paleolake were selected and their distribution in America during the Late Pliocene- Pleistocene was analyzed using the panbiogeographic method. As a result of the overlap of 27 individual tracks, 5 generalized tracks were obtained: I) Western North American, II) Central North American, III) Eastern North American, IV) Mesoamerican, and V) South American. The generalized tracks are consistent with previous proposals for extant gymnosperms, amphibians, sauropsids, birds, mammals, aquatic plants, insects, beetles, and nematodes, suggesting that distribution patterns have prevailed since the late Pliocene (Blancan). Four biogeographic nodes were identified, 2 situated in North America, in California and Colorado, the third located in the Santa María Amajac area in central Mexico, and the fourth located in Central America. El paleolago de Santa María Amajac se ubica en la parte central del estado de Hidalgo, México. Se seleccionaron 27 taxones fósiles pertenecientes a plantas acuáticas y terrestres, gasterópodos, ostrácodos, anfibios y mamíferos que habían sido previamente identificados en el área del paleolago, y se analizó su distribución en América durante el Plioceno Tardío-Pleistoceno a través del método panbiogeográfico. Como resultado de la superposición de los 27 trazos individuales se obtuvieron 5 trazos generalizados: I) norteamericano occidental, II) norteamericano central, III) norteamerciano oriental, IV) mesoamericano y V) sudamericano. Los trazos generalizados coinciden con los propuestos para gimnospermas, anfibios, saurópsidos, aves, mamíferos, plantas acuáticas, insectos, coleópteros y nemátodos recientes; lo que indica que los patrones de distribución han prevalecido desde el Plioceno tardío (Blancano). Se identificaron 4 nodos; 2 localizados en Estados Unidos de Norteamérica, en California y Colorado, otro localizado en el área de Santa María Amajac, en la parte central del país y el último en Centroamérica.
ISSN:1870-3453
2007-8706
2007-8706
DOI:10.7550/rmb.44392