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Post by divingwolf on Dec 1, 2012 18:31:49 GMT -9
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Post by divingwolf on Dec 1, 2012 18:35:45 GMT -9
Arctotherium latidens Bravard, 1857, se registra para el Ensenadense (Pleistoceno Inferior a Medio) de Argentina y Bolivia. Estos osos fueron los más grandes que habitaron en América del Sur, similares en talla al Arctodus simus, pero de hábitos omnívoros y ocupando ambientes de climas cálidos y húmedos. Es probable que su extinción, ocurrida a fines del Ensenadense, haya sido causada por los fuertes cambios ambientales en el Pleistoceno Medio, momento en el que comienza a aparecer notoriamente Pararctotherium en los registros fósiles (Soibelzon & Bond 1998). Source: www.cecalc.ula.ve/bioinformatica/oso/evol_contenido.htmTranslation: Arctotherium Latidens Bravard, 1857, is recorded for Ensenadan (Lower to Middle Pleistocene) of Argentina and Bolivia. These were the largest bears that lived in South America, similar in size to Arctodus simus, but with omnivorous habits and occupying environments of hot and humid climates. It is likely that its extinction occurred at the end of Ensenada, was caused by strong environmental changes in the Middle Pleistocene, when Pararctotherium begins to appear noticeably in the fossil record (Soibelzon & Bond 1998).
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Post by divingwolf on Dec 1, 2012 18:39:46 GMT -9
A pesar que desde 1857 fueron descritas más de cinco (5) especies dentro del género Arctotherium, actualmente se solo considera la validez de Arctotherium latidens (Soibelzon et al. 2000). www.cecalc.ula.ve/bioinformatica/oso/evol_contenido.htmAlthough since 1857 more than five (5) species were described within the genus Arctotherium, currently one only considers the validity of Arctotherium latidens (Soibelzon et al. 2000).
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Post by grrraaahhh on Dec 8, 2012 11:04:47 GMT -9
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Post by grrraaahhh on Dec 19, 2012 10:51:45 GMT -9
Source: C. Rusconi (1927).
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Post by sarus on Dec 20, 2012 13:34:36 GMT -9
Source: Kraglievich, L. J. (1926). According to Soibelzon the Pararctotherium pamparum skull (Fig. A) belongs to an Arctotherium tarijense and the skull in Fig. B belongs to a specimen of Arctotherium angustidens (see underlined text in red):SOURCE: SOIBELZON, LH. 2004. Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur.Revista del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" 6(1): 107-133.
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Post by sarus on Dec 20, 2012 14:25:34 GMT -9
Source: C. Rusconi (1927). I think that the two humeri belong to the same species — Arctotherium angustidens:SOURCE: SOIBELZON, LH. 2004. Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur.Revista del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" 6(1): 107-133.
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Post by grrraaahhh on Dec 23, 2012 14:20:17 GMT -9
You are right sarus. Thanks for the catch and correction. I just read through a preliminary translation of the 2004 SOIBELZON, L.H. article and its taxonomy revisions. The forum is better served if we can keep pace with the modern professional literature. As I have posted, I think creating a Genus: Arctotherium parent-thread to be then followed by offspring Arcotherium subspecies threads would prove best not to mention very fun.
For the sake of accuracy, deleting older/outdated threads should not be an issue (of course, any existing material can be incorporated into the new threads).
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