ACKNOWLEDGMENTS

Support for this work came from the National Geographic Society, Research and Exploration grant #8010-06 to BJS. A Frick Research Fellowship from the American Museum on Natural History provided support to BJS and a NSF Research Experience for Undergraduates grant (DBI-035817) to M. Siddall of the AMNH provided support for J.M. Emerson. The Institut de Recherche pour Développement, Lima, Perú, and the Institut Français d'Études Andines, Lima, allowed us the use of their vehicles in order to transport our crews to do field exploration in the central Andes. The Institut de Recherche pour Développement also supported the work J.-L.G. and P.B. The municipal government of Ambo not only permitted access to Jatun Uchco, but they were also very courteous to us during our stay in their community. We are grateful to the Roselló family, and especially to Gonzalo Roselló, for their important donation of all the bones from Roselló cave to the MUSM and for many discussions about the cave and its fauna.

We are grateful to the Instituto Nacional de Cultura, Lima, for providing us permits for fieldwork (R.D.N. N° 961/INC) and bone sampling (R.D.N. N° 1126/INC and (R.D.N. N° 1740/INC)). We also thank C.O. Obregón and M.C. Rivas from Instituto Regional de Cultura, Huánuco for facilitating our fieldwork.

Field assistants included I. Solano and M. Custodio Martel of Ambo, C. Guyot (daughter of J.-L. G.), D. Magno of Huaycabamba, A. Cuellar, then a student at the University of Florida, and K.M. Chávez Artapalo, a student at the Universidad Cayetano Heredia. Ms. Chávez also helped to identify pollen samples from the caves. We also thank A. Vásquez, Departamento de Mastozoolgía, Museo de Historia Natural – UNMSM, for her identification of the bat material from Jatun Uchco and L. Martin of the University of Kansas for his observations regarding the extinct felid that may have affinities with the extant jaguar. We are especially grateful to E. Díaz, of the MUSM, who cheerfully participated in all of the field expeditions.