A new species of Allobates (Anura: Aromobatidae) from Paleovárzea Forest in Amazonas, Brazil

Abstract

Numerous species of aromobatid frogs in the genus Allobates from the Amazonian region of Brazil have been described in recent years. Herein, we describe a new Allobates from the state of Amazonas. This species is allopatric with three other species of Allobates, two of which we have described previously. The new species inhabits streams in small remnants of paleovárzea forest along margins of a small river, the Paraná do Castanho. Paleovárzeas are ancient floodplains of the Amazon River and its tributaries. Paleovárzea forests are transitional between terra firme forests, which are never flooded, and várzeas, which are seasonally flooded. Males and females of the new species are similar in size; males average 20.1 mm, females 19.8. Tadpoles have a distinct dark brown bar extending from the snout through the eye to midbody. The call of this species consists of quickly repeated groups of single notes and is unique compared to known species of Allobates. Courtship includes cephalic amplexus. Eggs are deposited on the forest floor in cup-shaped leaves in the litter. Unlike other species of Allobates, egg capsules in this species are opaque instead of clear.

Limitations to the Use of Species-Distribution Models for Environmental-Impact Assessments in the Amazon

“…The two species selected for the analysis were Allobates nidicola [ 39 ], which was recently described with a distribution restricted to the Purus-Madeira interfluvial region, and Allobates femoralis (Boulenger 1883), which is widely distributed. While A .…”

A new diminutive species of Allobates Zimmermann and Zimmermann, 1988 (Anura, Aromobatidae) from the northwestern Rio Madeira—Rio Tapajós interfluve, Amazonas, Brazil

“…The new species is readily distinguished from Allobates brunneus (Cope 1887), A. gasconi (Morales 2000(Morales "2002, A. crombiei (Morales 2000(Morales "2002, and A. paleovarzensis Lima, Caldwell, Biavati & Montanarin 2010 by the absence of a distinct dark, diamond-shaped or hourglass pattern on dorsum, or dark brown markings on the head (Fig. 2).…”

Una nueva rana nodriza de los bosques de niebla asociados a la cuenca del Orinoco de Colombia

“…Una serie de tres lotes de renacuajos en diferentes estadios de desarrollo fueron obtenidos e incluyen renacuajos libres (lote IAvH-Am-14680), larvas de machos nodriza (IAvH-Am-14675, IAvH-Am-14658) y una pequeña serie de especímenes desarrollados in situ para un total de 69 ejemplares estudiados entre los estadios 26-41 (sensu Gosner, 1960) (Anexo 2). Los estados de desarrollo, la morfología del disco oral, la formula dentaria y las variables morfométricas empleadas son basadas en previas contribuciones (Gosner, 1960;Altig y McDiarmid, 1999;McDiarmid y Altig, 1999;Lima et al, 2009Lima et al, , 2010Anganoy-Criollo, 2013). El color in vivo fue descrito a partir de las Fotos y notas de campo.…”

“…El análisis de la vocalización fue realizado mediante el software Raven 1.4 para Windows (Charif et al, 2010), que incluye vocalizaciones a 44.1 KHz y 16-bits de resolución y para el análisis se empleó un FFT (Fast Fourier Transformation) = 256 y una superposición (Overlap) = 50. Los siguientes parámetros, que incluyen variables espectrales y temporales, siguen diferentes propuestas (Duellman y Pyles, 1983;Cocroft y Ryan, 1995;Coloma, 1995;Lima et al, 2009;Kok, 2010;Lima et al, 2010;Koch et al, 2011;Kok et al, 2013;Köhler et al, 2017) que incluyen: 1. Llamado (definido por la unidad acústica principal en una vocalización; un llamado está separado de otro por silencio), 2.…”