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Article
Strange Eocene rodents from Spain
Published online: 16/12/1996
Keywords:
Biogeography; Eocene; PHYLOGENY; Rodents; Spain; Zamoramys extraneus n. gen. n. sp.
https://doi.org/10.18563/pv.25.2-4.323-338
References: 47
Cite this article:
Pablo Pelaez-Campomanes and Nieves Lopez-Martinez, 1996. Strange Eocene rodents from Spain. PalaeoVertebrata 25 (2-4): 323-338. doi: 10.18563/pv.25.2-4.323-338
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Abstract
A new European rodent from the middle Eocene of Spain, Zamoramys extraneus n. gen., n. sp., appears to be closely related to the middle Eocene chapattimyid rodents of Indo-Pakistan. This contradicts the generally accepted paleobiogeographic hypothesis of a Tethyian barrier between Europe and Asia isolating Europe during the middle Eocene. Because of this barrier, some authors have proposed that European and Asian rodents were not closely related, their similarity being the result of morphological convergence. Here monophyly has been tested, using the parsimony criterion, based on an analysis of dental characters (including discussing of homology and the validity of some characteristics). Our results indicate a phylogenetic relationship among the Asiatic Ctenodactyloidea, Zamoramys from Spain, and the European endemic Theridomyoidea. We also conclude from our analysis that theridomyoids and European ischyromyoids are probably not closely related phylogenetically.
Published in Vol. 25, Fasc. 2-4 (1996)
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