PERSONAL DE APOYO
REGUERO Marcelo Alfredo
artículos
Título:
A NEW SPECIES OF EOPACHYRUCOS (MAMMALIA, NOTOUNGULATA, INTERATHERIIDAE) FROM THE LATE OLIGOCENE OF URUGUAY
Autor/es:
REGUERO, M.A.; UBILLA, M.; PEREA, D.
Revista:
JOURNAL OF VERTEBRATE PALEONTOLOGY
Editorial:
SOC VERTEBRATE PALEONTOLOGY
Referencias:
Lugar: Lawrence; Año: 2003 p. 445 - 457
ISSN:
0272-4634
Resumen:
A new species of the notoungulate Eopachyrucos is described on the basis of mandibles and lower
cheek teeth from the upper Oligocene Fray Bentos Formation of Uruguay. Eopachyrucos ranchoverdensis, sp. nov., is
most similar to the pre-Deseadan/post-Mustersan (late Eocene) Eopachyrucos pliciferus from Patagonia, but is much
larger and less hypsodont. The new species has a well-developed postmetacristid on p3 similar to that of Notopithecinae
but with higher crowned teeth. The Oligocene record of Eopachyrucos greatly extends its chronologic range. A cladistic
analysis of Eopachyrucos and other interatheriids supports the hypothesis that Eopachyrucos is the most primitive
interatheriine, retaining a number of primitive features also found in advanced Notopithecinae. The Fray Bentos Fauna
shares a few typical elements with Deseadan faunas from Patagonia, but an important distinction between the two
faunas is the persistence of some archaic taxa in the Fray Bentos Fauna. The overall composition of the Fray Bentos
Fauna is more similar to late Oligocene Deseadan faunas of Bolivia, and this may be attributed to temporal (younger
than the Deseadan of Patagonia) or ecological factors.Eopachyrucos is described on the basis of mandibles and lower
cheek teeth from the upper Oligocene Fray Bentos Formation of Uruguay. Eopachyrucos ranchoverdensis, sp. nov., is
most similar to the pre-Deseadan/post-Mustersan (late Eocene) Eopachyrucos pliciferus from Patagonia, but is much
larger and less hypsodont. The new species has a well-developed postmetacristid on p3 similar to that of Notopithecinae
but with higher crowned teeth. The Oligocene record of Eopachyrucos greatly extends its chronologic range. A cladistic
analysis of Eopachyrucos and other interatheriids supports the hypothesis that Eopachyrucos is the most primitive
interatheriine, retaining a number of primitive features also found in advanced Notopithecinae. The Fray Bentos Fauna
shares a few typical elements with Deseadan faunas from Patagonia, but an important distinction between the two
faunas is the persistence of some archaic taxa in the Fray Bentos Fauna. The overall composition of the Fray Bentos
Fauna is more similar to late Oligocene Deseadan faunas of Bolivia, and this may be attributed to temporal (younger
than the Deseadan of Patagonia) or ecological factors.Eopachyrucos ranchoverdensis, sp. nov., is
most similar to the pre-Deseadan/post-Mustersan (late Eocene) Eopachyrucos pliciferus from Patagonia, but is much
larger and less hypsodont. The new species has a well-developed postmetacristid on p3 similar to that of Notopithecinae
but with higher crowned teeth. The Oligocene record of Eopachyrucos greatly extends its chronologic range. A cladistic
analysis of Eopachyrucos and other interatheriids supports the hypothesis that Eopachyrucos is the most primitive
interatheriine, retaining a number of primitive features also found in advanced Notopithecinae. The Fray Bentos Fauna
shares a few typical elements with Deseadan faunas from Patagonia, but an important distinction between the two
faunas is the persistence of some archaic taxa in the Fray Bentos Fauna. The overall composition of the Fray Bentos
Fauna is more similar to late Oligocene Deseadan faunas of Bolivia, and this may be attributed to temporal (younger
than the Deseadan of Patagonia) or ecological factors.Eopachyrucos pliciferus from Patagonia, but is much
larger and less hypsodont. The new species has a well-developed postmetacristid on p3 similar to that of Notopithecinae
but with higher crowned teeth. The Oligocene record of Eopachyrucos greatly extends its chronologic range. A cladistic
analysis of Eopachyrucos and other interatheriids supports the hypothesis that Eopachyrucos is the most primitive
interatheriine, retaining a number of primitive features also found in advanced Notopithecinae. The Fray Bentos Fauna
shares a few typical elements with Deseadan faunas from Patagonia, but an important distinction between the two
faunas is the persistence of some archaic taxa in the Fray Bentos Fauna. The overall composition of the Fray Bentos
Fauna is more similar to late Oligocene Deseadan faunas of Bolivia, and this may be attributed to temporal (younger
than the Deseadan of Patagonia) or ecological factors.Eopachyrucos greatly extends its chronologic range. A cladistic
analysis of Eopachyrucos and other interatheriids supports the hypothesis that Eopachyrucos is the most primitive
interatheriine, retaining a number of primitive features also found in advanced Notopithecinae. The Fray Bentos Fauna
shares a few typical elements with Deseadan faunas from Patagonia, but an important distinction between the two
faunas is the persistence of some archaic taxa in the Fray Bentos Fauna. The overall composition of the Fray Bentos
Fauna is more similar to late Oligocene Deseadan faunas of Bolivia, and this may be attributed to temporal (younger
than the Deseadan of Patagonia) or ecological factors.Eopachyrucos and other interatheriids supports the hypothesis that Eopachyrucos is the most primitive
interatheriine, retaining a number of primitive features also found in advanced Notopithecinae. The Fray Bentos Fauna
shares a few typical elements with Deseadan faunas from Patagonia, but an important distinction between the two
faunas is the persistence of some archaic taxa in the Fray Bentos Fauna. The overall composition of the Fray Bentos
Fauna is more similar to late Oligocene Deseadan faunas of Bolivia, and this may be attributed to temporal (younger
than the Deseadan of Patagonia) or ecological factors.