Publication: A new species of Vasseuromys (Gliridae, Mammalia)
from the Upper Oligocene of the Ebro Basin (Spain)
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2014
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Springer-Verlag
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Abstract
In this paper, a new species of Vasseuromys,
V. bergasensis sp. nov., from the locality of Bergasa (Ebro
Basin, Spain), is described. Bergasa contains a fauna
belonging to the Late Oligocene (zone MP30), composed—
among other species—of Issiodoromys pseudanaema and
Rhodanomys transiens. The main diagnostic features of
V. bergasensis sp. nov. are the presence of a long centrolophid
(fused or not to the mesoconid) in the lower molars, a large
reduction in thenumber and length of extra ridges in the upper
and lower molars, the absence of extra ridges between metalophid
and centrolophid and between centrolophid and
mesolophid, and the absence of the metatrope in more
than half the specimens of the upper teeth M1 and M2.
V. bergasensis sp. nov. is similar in size to V. elegans and
smaller than the other members of the genus. The age and
simple dental pattern of the new species of Vasseuromys
allow us to hypothesize about relationships within the genus.