Artículo

Echarri, S.; Ercoli, M.D.; Amelia Chemisquy, M.; Turazzini, G.; Prevosti, F.J. "Mandible morphology and diet of the South American extinct metatherian predators (Mammalia, Metatheria, Sparassodonta)" (2017) Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 106(4):277-288
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Abstract:

Sparassodonta is a diverse group of extinct metatherian predators that include forms with diets ranging from omnivores to hypercarnivores, including potential bone-crushers and sabre-Tooth specialised species. Most of the previous dietary studies on the group were based on qualitative approaches or dental morphometric indexes and/or bite force estimations. In this study, we explore the evolution of mandible shape and diet of Sparassodonta in a comparative phylogenetic framework, using geometric morphometric tools and allometric and discriminant analyses. We analysed the mandible shape of 142 extant species of marsupials and placental carnivores, and 15 fossil sparassodont species. We found that the relationship between shape and size of the mandible is strongly structured by phylogeny, where the more derived borhyaenoids tend to possess stronger and larger mandibles. Derived borhyaenoid sparassodonts and basal borhyaenoids were classified as hypercarnivores (with short and robust mandibular body). Hathliacynid were classified as mesocarnivores or as hypercarnivores, but with lower probabilities and less specialised morphologies (with a long and slender mandible). Although dental morphology suggests that most of the species of Sparassodonta would have been hypercarnivores, the robustness of the mandible seems to be informative regarding the prey size and degree of specialisation. The relationship between mandibular size and shape, and talonid/trigonid relative size, is strongly influenced by the phylogenetic legacy, suggesting that ecological factors could have influenced the evolution of the sparassodonts. © Copyright The Royal Society of Edinburgh 2017.

Registro:

Documento: Artículo
Título:Mandible morphology and diet of the South American extinct metatherian predators (Mammalia, Metatheria, Sparassodonta)
Autor:Echarri, S.; Ercoli, M.D.; Amelia Chemisquy, M.; Turazzini, G.; Prevosti, F.J.
Filiación:División Mastozoología, Museo Argentino de Ciencias Naturales Bernardino Rivadavia (CONICET), Av. Ángel Gallardo 470, Ciudad Autónoma de Buenos Aires, 1405, Argentina
Instituto de Ecorregiones Andinas (INECOA), Universidad Nacional de Jujuy, CONICET, Av. Bolivia 1661, San Salvador de Jujuy, 4600, Argentina
Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de la Rioja, Provincia de la Rioja, CONICET, Entre Ríos y Mendoza s.n., CP 5301, Anillaco, La Rioja, Argentina
Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Autónoma de Buenos Aires, 1428, Argentina
Palabras clave:Borhyaenoidea; evolutionary constraints; geometric morphometrics; Hathliacynidae; palaeoecology; diet; evolutionary biology; marsupial; morphology; paleoecology; paleontology; predator; Mammalia; Metatheria; Sparassodonta
Año:2017
Volumen:106
Número:4
Página de inicio:277
Página de fin:288
DOI: http://dx.doi.org/10.1017/S1755691016000190
Título revista:Earth and Environmental Science Transactions of the Royal Society of Edinburgh
Título revista abreviado:Earth Environ. Sci. Trans. R. Soc. Edinburgh
ISSN:17556910
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_17556910_v106_n4_p277_Echarri

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Citas:

---------- APA ----------
Echarri, S., Ercoli, M.D., Amelia Chemisquy, M., Turazzini, G. & Prevosti, F.J. (2017) . Mandible morphology and diet of the South American extinct metatherian predators (Mammalia, Metatheria, Sparassodonta). Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 106(4), 277-288.
http://dx.doi.org/10.1017/S1755691016000190
---------- CHICAGO ----------
Echarri, S., Ercoli, M.D., Amelia Chemisquy, M., Turazzini, G., Prevosti, F.J. "Mandible morphology and diet of the South American extinct metatherian predators (Mammalia, Metatheria, Sparassodonta)" . Earth and Environmental Science Transactions of the Royal Society of Edinburgh 106, no. 4 (2017) : 277-288.
http://dx.doi.org/10.1017/S1755691016000190
---------- MLA ----------
Echarri, S., Ercoli, M.D., Amelia Chemisquy, M., Turazzini, G., Prevosti, F.J. "Mandible morphology and diet of the South American extinct metatherian predators (Mammalia, Metatheria, Sparassodonta)" . Earth and Environmental Science Transactions of the Royal Society of Edinburgh, vol. 106, no. 4, 2017, pp. 277-288.
http://dx.doi.org/10.1017/S1755691016000190
---------- VANCOUVER ----------
Echarri, S., Ercoli, M.D., Amelia Chemisquy, M., Turazzini, G., Prevosti, F.J. Mandible morphology and diet of the South American extinct metatherian predators (Mammalia, Metatheria, Sparassodonta). Earth Environ. Sci. Trans. R. Soc. Edinburgh. 2017;106(4):277-288.
http://dx.doi.org/10.1017/S1755691016000190