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Evolution in the genus Rhinella : a total evidence phylogenetic analysis of neotropical true toads (Anura: Bufonidae). (Bulletin of the American Museum of Natural History, no. 447)

Show simple item record Pereyra, Martín O. Blotto, Boris L. Baldo, Diego Chaparro, Juan C. Ron, Santiago R. Elias-Costa, Agustín J. Iglesias, Patricia P. Venegas, Pablo J. Thomeí, Maria Tereza C. Ospina-Sarria, Jhon Jairo Maciel, Natan M. Rada, Marco Kolenc, Francisco Borteiro, Claudio Rivera-Correa, Mauricio Rojas Runjaic, Fernando J.M. Moravec, Jiri Riva, Ignacio de la Wheeler, Ward C. Castroviejo-Fisher, Santiago Grant, Taran Haddad, Celio F.B. Faivovich, Julian 2021-03-31T12:50:57Z 2021-03-31T12:50:57Z 2021-03-31
dc.description 155 pages : illustrations (some color) ; 26 cm. en_US
dc.description.abstract True toads of the genus Rhinella are among the most common and diverse group of Neotropical anurans. These toads are widely distributed throughout South America, inhabiting a great diversity of environments and ecoregions. Currently, however, the genus is defined solely on the basis of molecular characters, and it lacks a proper diagnosis. Although some phenetic species groups have traditionally been recognized within Rhinella, the monophyly of some of them have been rejected in previous phylogenetic analyses, and many species remain unassigned to these poorly defined groups. Additionally, the identity and taxonomy of several species are problematic and hinder the specific recognition and description of undescribed taxa. In this work, we first perform phylogenetic analyses of separate mitochondrial and nuclear datasets to test the possible occurrence of hybridization and/or genetic introgression in the genus. The comparative analysis of both datasets revealed unidirectional mitochondrial introgressions of an unknown parental species into R. horribilis ("ghost introgression") and of R. dorbignyi into R. bernardoi; therefore, the mitochondrial and nuclear datasets of these species were considered separately in subsequent analyses. We performed total-evidence phylogenetic analyses that included revised molecular (four mitochondrial and five nuclear genes) and phenotypic (90 characters) datasets for 83 nominal species of Rhinella, plus several undescribed and problematic species and multiple outgroups. Results demonstrate that Rhinella was nonmonophyletic due to the position of R. ceratophrys, which was recovered as the sister taxon of Rhaebo nasicus with strong support. Among our outgroups, the strongly supported Anaxyrus + Incilius is the sister clade of all other species of Rhinella. Once R. ceratophrys is excluded, the genus Rhinella is monophyletic, well supported, and composed of two major clades. One of these is moderately supported and includes species of the former R. spinulosa Group (including R. gallardoi); the monophyletic R. granulosa, R. crucifer, and R. marina Groups; and a clade composed of the mitochondrial sequences of R. horribilis. The other major clade is strongly supported and composed of all the species from the non-monophyletic R. veraguensis and R. margaritifera Groups, the former R. acrolopha Group, and R. sternosignata. Consistent with these results, we define eight species groups of Rhinella that are mostly diagnosed by phenotypic synapomorphies in addition to a combination of morphological character states. Rhinella sternosignata is the only species that remains unassigned to any group. We also synonymize nine species, treat three former subspecies as full species, and suggest that 15 lineages represent putative undescribed species. Lastly, we discuss the apparently frequent occurrence of hybridization, deep mitochondrial divergence, and "ghost introgression"; the incomplete phenotypic evidence (including putative character systems that could be used for future phylogenetic analyses); and the validity of the known fossil record of Rhinella as a source of calibration points for divergence dating analyses. en_US
dc.language.iso en_US en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History;no. 447.
dc.subject Rhinella -- Phylogeny. en_US
dc.subject Bufonidae -- South America -- Phylogeny. en_US
dc.subject Toads -- South America -- Phylogeny. en_US
dc.subject Amphibians -- South America -- Phylogeny. en_US
dc.title Evolution in the genus Rhinella : a total evidence phylogenetic analysis of neotropical true toads (Anura: Bufonidae). (Bulletin of the American Museum of Natural History, no. 447) en_US
dc.title.alternative Evolution in Rhinella (Anura: Bufonidae) en_US
dc.type Book en_US

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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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