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Mammals are among the fastest-radiating groups, being characterized by a mean species lifespan of the order of 2.5 million years (Myr). The basis for this characteristic timescale of origination, extinction and turnover is not well understood. Various studies have invoked climate change to explain mammalian species turnover, but other studies have either(More)
The age structures of two successive rodent communities are studied on the basis of a rich record from well-dated Miocene sections (17-10 Ma) in north-central Spain. Community age is defined as the mean of the residence times of the community members at the time of the locality age. Community ages are negatively correlated with the numbers of community(More)
The material of Rotundomys (Rodentia, Cricetinae) from the Late Miocene fossiliferous complex of Cerro de los Batallones (Madrid, Spain) is described and compared with all species currently placed in the genera Rotundomys and Cricetulodon. Both the morphology and size variation encompassed in the collection of specimens from Batallones suggest they belong(More)
10. These descriptions are made with the tooth row oriented horizontally. 34. Body mass (BM) estimates were based on the regressions (29) derived for the following measurements , taken on the mid-lumbar vertebra (level L VI): vertebral body width at the cranial end 0 30.0 mm, vertebral body height at the cranial end 0 21.7 mm, caudal surface area of the(More)
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