![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
ABSTRACT
The frog genus Odontophrynus comprises 10 species arranged in three species groups that inhabit southeastern South America. In Argentina, it is represented by the O. americanus and O. occidentalis species groups and, despite being a fairly common taxon of the extant herpetofauna, it has no known fossil record. Here we report on the first fossil record of the genus, based on an almost complete right ilium from the lower levels of the Buenos Aires Formation (OIS 11, Bonaerian age, middle Pleistocene) in the Bonaerian Pampas of Argentina. The taxonomic allocation is derived from a thorough survey of anuran ilia and is grounded in a set of distinct ilial characters that, in combination, do not occur in any other anuran. These include: ilium not fused to ischium; well-developed dorsal acetabular expansion; broad preacetabular zone with a shallow preacetabular fossa; straight ilial shaft lacking dorsal ridge; and spike-like dorsal prominence bearing a distinct dorsal protuberance. Additionally, after comparing with a large sample of specimens representing most species of Odontophrynus, we propose two main characters (high spike-like dorsal prominence, absence of a lateral knob on the dorsal prominence) that allow referral to Odontophrynus aff. O. americanus or O. cordobae.
SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
Citation for this article: Turazzini, G. F., M. L. Taglioretti, and R. O. Gómez. 2016. First fossil record of the South American frog genus Odontophrynus Reinhardt and Lütken, Citation1862 (Anura, Neobatrachia). Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1228657.
ACKNOWLEDGMENTS
We thank the MMP for the loan of the fossil material. We are grateful to J. Williams (MLP) for the loan of specimens of Odontophrynus for dissections and skeletonization. Thanks are extended to F. A. Nascimento and B. Lisboa (MUFAL) for the photographic material of Macrogenioglottus, and to M. Fabrezi (MCN) and A. M. Báez (FCEN, MACN) for access to materials under their care. We also thank two anonymous reviewers and editor L. Werdelin for corrections. This work was funded through grants from Universidad de Buenos Aires to R. O. Gómez (UBACyT 20020120300005), Agencia Nacional de Promoción Científica y Tecnológica to A. M. Báez (PICT 1895/11), and CONICET to F. I. Isla (PIP 382).
