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      Estudio comparativo de algunos elementos de las extremidades anteriores y posteriores y piezas dentales de puma (Puma concolor) y jaguar (Panthera onca) Translated title: Comparative study of some elements of the forelimbs and hindlimbs and teeth of the cougar (Puma concolor) and jaguar (Panthera onca)

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          Abstract

          Se realizó un estudio osteológico comparativo de algunos elementos de las extremidades anteriores y posteriores y de las piezas dentales entre ejemplares de las dos grandes especies de felinos de América: el puma (Puma concolor) y el jaguar (Panthera onca). Se utilizaron 29 ejemplares de puma y 31 de jaguar, alojadas en distintas colecciones osteológicas de México. Las diferencias más notables que se encontraron fueron que las inserciones musculares de los elementos de las extremidades anteriores y posteriores están más desarrolladas en el jaguar, en cambio en el puma, éstas están ausentes o, en su caso son someras. Se observó que las piezas dentarias en el jaguar son anchas y en el puma son angostas. Este tipo de estudio facilita la identificación de restos óseos encontrados en diferentes contextos arqueológicos y paleontológicos.

          Translated abstract

          A comparative osteologic study of specimens from the two big cats of America, cougar (Puma concolor) and jaguar (Panthera onca), was undertaken. Twenty nine specimens from cougars and thirty one from jaguars that were housed in different osteological collections in Mexico were analyzed. The main differences were that the muscle attachments of the elements of the forelimbs and hindlimbs are more developed in the jaguar than in the cougar, in which they are either absent or poorly developed. It was observed that the jaguar teeth are wide whereas the cougar ones are narrow. This study will help in the identification of skeletal remains found in archeological and paleontological contexts.

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          Most cited references28

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          Mammalian evolution and the great american interchange.

          A reciprocal and apparently symmetrical interchange of land mammals between North and South America began about 3 million years ago, after the appearance of the Panamanian land bridge. The number of families of land mammals in South America rose from 32 before the interchange to 39 after it began, and then back to 35 at present. An equivalent number of families experienced a comparable rise and decline in North America during the same interval. These changes in diversity are predicted by the MacArthur-Wilson species equilibrium theory. The greater number of North American genera (24) initially entering South America than the reverse (12) is predicted by the proportions of reservoir genera on the two continents. However, a later imbalance caused by secondary immigrants (those which evolved from initial immigrants) is not expected from equilibrium theory.
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            Mammalian faunal dynamics of the great American interchange

            S. Webb (1976)
            The American interchange of land mammals reached its acme during the late Blancan and early Irvingtonian in North America and during the Chapadmalalan and Uquian in South America. It lasted about two million years and included taxa adapted to diverse habitats. It was preceded in the early Hemphillian in North America and the Huayquerian in South America by the interchange of a few heralding genera. The MacArthur-Wilson faunal equilibrium hypothesis correctly predicts a marked increase in originations, number of genera, and turnover rate for the South American fauna during the peak of the interchange. Subsequent further increases were not so predicted but closely resemble patterns also observed in late Pleistocene land mammals of Europe and North America. The continued increase in South American land mammal genera after the interchange had largely ceased resulted principally from autochthonous evolution of northern immigrant stocks. A marked decrease in South American ungulate genera (from thirteen to three) coincided with the appearance of fourteen northern ungulate genera and therefore appears to be a replacement phenomenon. The area/diversity relationship predicts no important change in generic diversity if a maximum of only nine percent of North America is occupied by the interamerican mingled fauna. At the family level, however, diversity is seriously overestimated due to the nomenclatural artifact of increased relative diversity by filtering.
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              Panthera onca

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                Author and article information

                Journal
                tip
                TIP. Revista especializada en ciencias químico-biológicas
                TIP
                Universidad Nacional Autónoma de México, Facultad de Estudios Superiores, Plantel Zaragoza (México, DF, Mexico )
                1405-888X
                December 2010
                : 13
                : 2
                : 73-90
                Affiliations
                [01] México Distrito Federal orgnameInstituto Nacional de Antropología e Historia orgdiv1Subdirección de Laboratorios y Apoyo Académico orgdiv2Laboratorio de Arqueozoología M. en C. Ticul Álvarez Solorzano México ardillam3@ 123456hotmail.com
                Article
                S1405-888X2010000200002 S1405-888X(10)01300200002
                3d0f7a9e-3738-4690-a5a1-06a4e5f5feef

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 18 August 2010
                : 09 November 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 18
                Product

                SciELO Mexico

                Categories
                Artículos originales

                cougar,teeth,comparative osteology,jaguar,Postcranial elements,puma,piezas dentarias,osteología comparativa,Elementos postcraneales

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