Skip to main content
×
×
Home

A new Xenungulata (Mammalia) from the Paleocene of Patagonia, Argentina

  • Javier N. Gelfo (a1) (a2), Guillermo M. López (a1) and Mariano Bond (a1) (a2)
Abstract

A new form of Xenungulata Paula Couto, 1952 from red levels of the Peñas Coloradas Formation in a locality near Puerto Visser (45°17'S, 67°01'W), Chubut province, Argentina, is represented by a fragmentary left jaw with the m3 (MPEF-PV 1871). Notoetayoa gargantuai n. gen. and n. sp. is the first ever found in direct association with Carodnia feruglioi Simpson, 1935a which characterizes the incompletely known homonymous zone of the late Paleocene of Patagonia. A preliminary phylogenetic analysis, including representatives of “Condylarthra,” Litopterna, Notoungulata, Pyrotheria, Xenungulata and Astrapotheria, plus the characters that could be scored in the new taxon, was performed using TNT software. A single most parsimonious tree was obtained. Notoetayoa gargantuai has a closer phylogenetic relationship with the Xenungulate Etayoa bacatensis Villarroel, 1987 from the ?middle Paleocene of Colombia than with any other Tertiary ungulate group of South America. Notoetayoa gargantuai fills an important gap in the knowledge of the mammalian faunas from the Paleocene of Patagonia, particularly of the poorly known pre-Itaborian times.

Copyright
References
Hide All
Ameghino, F. 1897. Mammifères crétacés de l'Argentine. (Deuxième contribution à la connaissance de la faune mammalogique des couches à Pyrotherioum). Boletín del Instituto Geográfico Argentino, Buenos Aires, 18:406429, 431-521.
Ameghino, F. 1901. Notices préliminaires sur des ongulés nouveaux des terrains crétacés de Patagonie. Boletín de la Academia Nacional de Ciencias de Córdoba, Buenos Aires, 16:350426.
Bergqvist, L. P., Powell, J. E., and Avilla, L. S. 2004. A new Xenungulate from the Rio Loro Formation (Paleocene) from Tucumán province (Argentina). Ameghiniana Suplemento, 41(4):36 R.
Bond, M. and Vucetich, M. G. 1983. Indalecia grandensis gen. et sp. nov. del Eoceno temprano del Noroeste Argentino, tipo de una nueva subfamilia de los Adianthidae (Mammalia, Litopterna). Revista Asociación Geológica Argentina, 38(1):107117.
Bond, M., Carlini, A. A., Goin, F. J., Legarreta, L., Ortiz-Jaureguizar, E., Pascual, R., and Uliana, M. A. 1995. Episodes in South American Land Mammal Evolution and Sedimentation: Testing their apparent concurrence in a Paleocene succession from Central Patagonia. Actas del VI Congreso Argentino de Paleontología y Bioestratigrafía, Trelew, 4758.
Chaffee, R. G. 1952. The Deseadan Vertebrate fauna of the Scarritt Pocket, Patagonia. Bulletin of American Museum of Natural History, 98:503562.
Cifelli, R. L. 1993. The phylogeny of the native South American ungulates, p. 95216. In Szalay, F. S., Novacek, M. J., and McKenna, M. (eds.), Mammal Phylogeny: Placentals. Springer-Verlag, New York.
Coddington, J. and Scharff, N. 1994. Problems with zero length branches. Cladistics, 10:415423.
Fortelius, M. 1985. Ungulate cheek teeth: Developmental, functional, and evolutionary interrelations. Acta Zoologica Fennica, 180:176.
Gelfo, J. N., López, G., and Bond, M. 2004. Preliminary analysis of large Didolodontidae (Mammalia) from the Paleocene of Patagonia, Argentina. Ameghiniana Suplemento, 41(4): 13 R.
Goloboff, P., Farris, J., and Nixon, K. 2003. T.N.T: Tree Analysis Using New Technology. program available from the authors andwww.zmuc.dk/public/phylogeny/tnt.
Legarreta, L. and Uliana, M. A. 1994. Asociación de fósiles y hiatos en el Supracretácico-Neógeno de la Patagonia: Una perspectiva estratigráficosecuencial. Ameghiniana, 31(3):257281.
McKenna, M. C. 1981. Early history and biogeography of South America's extinct land mammals, p. 4377. In Ciochon, R. L. and Chiarelli, A. B. (eds.), Evolutionary Biology of the New World Monkeys and Continental Drift. Plenum Press, New York,
Marshall, G. L., Sempere, T., and Butler, R. F. 1997. Chronostratigraphy of the Mammal-Bearing Paleocene of South America. Journal of South American Earth Sciences, 10(1):4970.
Muizon, C. de and Marshall, L. G. 1987. Deux nouveaux condylarthres (Mammalia) du Maastrichtien de Tiupampa (Bolivie). Comptes Rendus Hebdomaires des scéances de l'Academie des Sciences, Paris, 304:947950.
Osborn, H. F. 1907. Evolution of mammalian molar teeth to and from the triangular type. Gregory, W. K. (ed.), Mc Millan, New York-London, 250 p.
Pascual, R., Vucetich, M. G., and Fernández, M. 1978. Los primeros mamíferos (Notoungulata, Henricosborniidae) de la Formación Mealla (Grupo Salta, Subgrupo Santa Bárbara). Sus implicancias filogenéticas, taxonómicas y cronológicas. Ameghiniana, 15(3-4):366390.
Patterson, B. 1977. A primitive Pyrothere (Mammalia Notoungulata) from the Early Tertiary of Northwestern Venezuela. Fieldiana Geology, 33(22): 397422.
Paula Couto, C. 1952. Fossil mammals from the beginning of the Cenozoic in Brazil. Condylarthra, Litopterna, Xenungulata and Astrapotheria. Bulletin of American Museum of Natural History, 99:355394.
Peres Line, S. R. and Pagliarelli Bergqvist, L. 2005. Enamel structure of Paleocene mammals of the Sao José de Itaboraí basin, Brazil. “Condylarthra”, Litopterna, Notoungulata, Xenungulata and Astrapotheria. Journal of Vertebrate Paleontology, 25(4):924928.
Price, L. I. and Paula Couto, C. 1950. Vertebrados terrestres do Eoceno na bacia calcirea de Itaborai. Anais Do Segundo Congresso Panamericano de Engenharia de Minas e Geologia, Rio de Janeiro, Vol. 3, pp. 149173.
Roth, S. 1903. Los ungulados sudamericanos. Anales del Museo de La Plata, (5): 136.
Schoch, R. M. and Lucas, S. G. 1985. The phylogeny and classification of Dinocerata (Mammalia, Eutheria). Bulletin of the Geological Institutions of the University of Uppsala, 11:3158.
Simpson, G. G. 1935a. Occurrence and relationship of the Río Chico fauna of Patagonia. American Museum Novitates, 818:121.
Simpson, G. G. 1935b. Descriptions of the oldest know South American mammals from Río Chico formation. American Museum Novitates, 793:125.
Simpson, G. G. 1967. The beginning of the age of mammals in South America, Pt. 2, Bulletin of American Museum of Natural History, 137:1259.
Simpson, G. G. 1980. Splendid Isolation, the Curious History of South American Mammals. Yale University Press, New Haven, pp. 266.
Simpson, G. G. and Minoprio, J. L. 1949. A new adiathine litoptern and associated mammals from a Deseadan faunule in Mendoza, Argentina. American Museum Novitates, 1434:127.
Soria, M. F. 1980. Una nueva y problemática forma de ungulado del Casamayorense. II Congreso Argentino de Paleontología y Bioestratigrafía y I Congreso Latinoamericano de Paleontología, Buenos Aires, 1978. Actas II: 193203.
Soria, M. F. 1981. Los Litopterna del Colhuehuapense (Oligoceno tardío) de la Argentina. Revista del Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Serie Paleontológica, 3(91): 154.
Soria, M. F. 1984. Eoastrapostylopidae: diagnosis e implicaciones en la sistemática y evolución de los Astrapotheria preoligocénicos. Actas III Congreso Argentinao de Paleontología y Bioestratigrafía, Corrientes, 175182.
Soria, M. F. 1989. Notopterna: un nuevo orden de mamíferos ungulados eógenos de América del Sur, Pt. II, Notonychops powelli gen. et sp. nov (Notonychopidae nov.) de la formación Río Loro (Paleoceno medio) Provincia de Tucumán, Argentina. Ameguiniana, 25(3):259272.
Soria, M. F. and Powell, J. E. 1982. Un primitivo Astrapotheria (Mammalia) y edad de la Formación Río Loro, Provincia de Tucumán, República Argentina. Ameghiniana, 18(2-4): 155168.
Stirton, R. A. 1941. Development of characters in horse teeth and the dental nomenclature. Journal of Mammalogy, 22:434446.
Szalay, F. S. 1969. Mixodectidae, Microsyopidae, and the insectivore-primate transition. Bulletin of the American Museum of Natural History, 140: 193330.
Van Valen, L. 1966. Deltatheridia, a new order of mammals. Bulletin of the American Museum of Natural History, 132:1126.
Villarroel, C. A. 1987. Características y afinidades de Etayoa n. gen., tipo de una nueva familia de Xenungulata (Mammalia) del Paleoceno medio (?) de Colombia. Comunicaciones Paleontológicas del Museo de Historia Natural de Montevideo, 19(1):241253.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
  • URL: /core/journals/journal-of-paleontology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed