Journal of Mammalian Evolution

, Volume 16, Issue 3, pp 175–198

New Data on Miocene Neotropical Provinciality from Cerdas, Bolivia

  • Darin Andrew Croft
  • Federico Anaya
  • David Auerbach
  • Carmala Garzione
  • Bruce J. MacFadden
Original Paper

DOI: 10.1007/s10914-009-9115-0

Cite this article as:
Croft, D.A., Anaya, F., Auerbach, D. et al. J Mammal Evol (2009) 16: 175. doi:10.1007/s10914-009-9115-0

Abstract

We provide the first faunal report for the early/middle Miocene fauna of Cerdas, Bolivia (16.5–15.3 Ma; 20° 52′ S, 66° 19′ W), based primarily on new specimens collected in 2007. As many as twelve species of mammals in nine families are represented. Notoungulates include Palyeidodon obtusum (Toxodontidae), Protypotherium cf. attenuatum and Protypotherium sp. nov. (Interatheriidae), ‘Plesiotypotherium’ minus and possibly Microtypotherium choquecotense (Mesotheriidae), and Hegetotherium? sp. nov. (Hegetotheriidae). Xenarthrans include Stenotatus planus and Prozaedyus sp. (Cingulata: Dasypodidae), Peltephilidae gen. et sp. nov. (Cingulata), and Xyophorus cf. bondesioi (Pilosa: Nothrotheriidae). A new species of litoptern is also present (Macraucheniidae) as well as an unidentified rodent (Chinchillidae: Lagostominae). Two of these Cerdas species occur in Friasian sensu stricto/Colloncuran SALMA faunas of Patagonia, and perhaps one in Santacrucian SALMA faunas. Among middle latitude localities, Cerdas resembles Chucal, Chile (late early Miocene, Santacrucian SALMA) in community composition (e.g., abundant mesotheriids, few rodent species), but has no species in common; it shares one species with Quebrada Honda, Bolivia (middle Miocene, Laventan SALMA), and perhaps as many as three more. These observations indicate that Cerdas is not referable to the Santacrucian, and that the upper limit of this SALMA in the middle latitudes falls somewhere between 17.5 Ma (the top of Chucal) and 16.5 Ma (the base of Cerdas). Based on the range of dates proposed for the youngest Santacrucian intervals in Patagonia, a diachronous offset of up to 2.1 Ma may exist at this point in the SALMA sequence between middle and high latitude faunas.

Keywords

BoliviaLand Mammal AgeLitopternaMioceneNotoungulataProvincialitySouth AmericaXenarthra

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Darin Andrew Croft
    • 1
  • Federico Anaya
    • 2
  • David Auerbach
    • 3
  • Carmala Garzione
    • 3
  • Bruce J. MacFadden
    • 4
  1. 1.Department of AnatomyCase Western Reserve University School of MedicineClevelandUSA
  2. 2.Facultad de Ingeniería GeológicaUniversidad Autónoma Tomás FríasPotosíBolivia
  3. 3.Department of Earth and Environmental SciencesUniversity of RochesterRochesterUSA
  4. 4.Florida Museum of Natural HistoryUniversity of FloridaGainesvilleUSA