We report the discovery of a new singleton species of Oreobates Jiménez de la Espada, 1872, from the Yungas forest of the Amazonian versant of the Andes in Bolivia, infer its phylogenetic position, revisit the phylogenetic relationships of Oreobates, and discuss the conditions that justify description of the species with a single specimen. The new species, Oreobates yanucu, differs from all other Oreobates in a combination of external conditions: granular dorsal skin with scattered warts, finger I longer than finger II, finger tips of fingers III and IV distinctly enlarged and truncate in outline, tips of toes II to V with ungual flaps, head longer than wide, basal webbing between toes I and II and toes II and III, foot length/snout—vent length = 50%, lack of orange, red, or scarlet flecks and blotches in life. Although similar in appearance to O. amarakaeri Padial et al., 2012, O. choristolemma (Harvey and Sheehy, 2005), O. granulosus (Boulenger, 1902), O. sanctaecrucis (Harvey and Keck, 1995), and O. sanderi (Padial et al., 2005)—all of them species from the Yungas of Bolivia and southern Peru conforming a monophyletic group—the new species is nested within a clade, revealed by molecular phylogeny, in which all species share the condition of enlarged finger discs and is sister to O. berdemenos Pereyra et al., 2014, an allopatric species from the Yungas of Argentina. The new species is only known from a single specimen collected in 1999 at 1500 m above sea level within Carrasco National Park (Provincia Chapare, Departamento Cochabamba, Bolivia). Oreobates now includes 24 described species but seven other new species remain to be named formally and we expect the diversity of this group to increase considerably with the exploration of the Andean foothills of Bolivia and Peru.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 84 • No. 1