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Rodents from the Lower Oligocene of the Bierzo Basin (Leon, Spain)

机译:Bierzo盆地下渐新世的啮齿动物(西班牙,利昂)

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摘要

The Bierzo Basin is one of a series of Tertiary basins, located in the NW of the Iberian Peninsula linked to the Alpine Pyrenean orogeny. So far, its exact age was unknown because no paleontological data were available. Two new fossiliferous localities between Fresnedo and Tombrio de Arriba in the Bierzo Basin (Leon, Spain) permit such a dating for the first time. The fossil rodent collection from REY1, includes Issiodoromys bergidensis sp. nov., Protechimys cf. truci, Pseudo-cricetodon simplex, and Gliravus majori. Its age is late Early Oligocene (MP24). The second locality, REY3B, contains Issiodoromys minor, Protechimys cf. gracilis, Allocricetodon sp. nov., Pseudo-cricetodon simplex, Heterocricetodon aff. schiosseri, and Oligodyromys planus. Its age is latest Early Oligocene age (MP25).
机译:Bierzo盆地是一系列第三纪盆地之一,位于伊比利亚半岛西北部,与高山比利牛斯山造山运动有关。到目前为止,尚无确切年龄,因为尚无古生物学数据。在比尔佐盆地(西班牙里昂)的弗雷斯内多(Fresnedo)和汤姆布里奥·德·阿里巴(Tombrio de Arriba)之间的两个新的化石地点首次允许这样的定年。来自REY1的化石啮齿动物集合包括Issiodoromys bergidensis sp。十一月,Protechimys参见。 truci,Pseudo-cricetodon simplex和Gliravus majori。它的年龄是早渐新世(MP24)。第二个位置REY3B包含Prosisimys cf.的未成年人Issiodoromys。 gracilis,Allocricetodon sp。 11月,单纯假单胞菌,Heterocricetodon aff。 schiosseri和扁平寡头。它的年龄是最新的渐新世早期(MP25)。

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