Journal of Mammalian Evolution

, 18:245

New Middle Miocene Caviomorph Rodents from Quebrada Honda, Bolivia

  • Darin A. Croft
  • Jennifer M. H. Chick
  • Federico Anaya
Original Paper

DOI: 10.1007/s10914-011-9164-z

Cite this article as:
Croft, D.A., Chick, J.M.H. & Anaya, F. J Mammal Evol (2011) 18: 245. doi:10.1007/s10914-011-9164-z

Abstract

The rodents of the middle Miocene fauna of Quebrada Honda Bolivia are described. The most abundant rodent is the chinchillid Prolagostomus sp. More precise identification of this species will require revision of early to middle Miocene lagostomines, taking into account variation in modern populations. The next most common rodents are the tiny octodontoid Acarechimys, sp. nov.?, and the caviid Guiomys unica. The Acarechimys species may be unique to Quebrada Honda, but verification awaits revision of this geographically and temporally widespread genus. Guiomys unica is a recently described species otherwise known only from two Patagonian localities, El Petiso and Río Chico. Two rodents are unique to Quebrada Honda. Mesoprocta hypsodus, gen. et sp. nov., is a dasyproctid distinguished by its very hypsodont, cement-covered cheek teeth. Quebradahondomys potosiensis, gen. et sp. nov., is an adelphomyine echimyid distinguished by the less oblique lophids of its trilophodont cheek teeth, among other features. The rodents of Quebrada Honda are more similar to those of Patagonia than those of northern South America, paralleling patterns seen in other mammal groups from this fauna.

Keywords

Endemism Laventan Neogene Neotropics Provinciality Rodentia South America 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Darin A. Croft
    • 1
  • Jennifer M. H. Chick
    • 2
  • Federico Anaya
    • 3
  1. 1.Department of AnatomyCase Western Reserve University School of MedicineClevelandUSA
  2. 2.Department of BiologyCase Western Reserve UniversityClevelandUSA
  3. 3.Facultad de Ingeniería GeológicaUniversidad Autónoma Tomás FríasPotosíBolivia

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