Monday, September 6, 2021

[Herpetology • 2021] Allobates sieggreenae • A New Species of Nurse-Frog (Anura: Aromobatidae) from the Amazonian Forest of Loreto, Peru

Allobates sieggreenae
 Gagliardi-Urrutia, Castroviejo-Fisher, Rojas-Runjaic, Jaramillo, Solís & Simões, 2021.
We describe a new species of nurse-frog (Aromobatidae, Allobates) from the Amazonian forest of Loreto, Peru using morphological, acoustic and genetic data. Our phylogenetic analysis placed Allobates sieggreenae sp. nov. as the sister species of A. trilineatus, the most similar-looking species and with which it was previously confused. However, the new species has a brown dorsum, solid dark brown lateral dark stripe not fading towards groin, adult males with few and sparse melanophores over a cream background on chin, chest, and belly, dark transverse bars absent on thighs, and an advertisement call formed by a trill of single notes (in A. trilineatus dorsum dark brown, blackish brown lateral dark stripe, paler from mid-body to groin, adult males with a dark background color on chin, chest, and belly due to a dense layer of melanophores, dark transverse bar present on dorsal surface of thighs, and trills of paired notes). Allobates sieggreenae is known from two localities of Amazonian white-sand forest ecosystems east of the Ucayali River.

Keywords: Amphibia, Advertisement calls, Amazonia, Allobates trilineatus, Allobatinae, external morphology, mtDNA, systematics

Figure 1. (A) Map of western Amazonia and neighboring areas (inset map indicates its location within South America) showing rivers (blue lines), country borders (black contours), and known localities of Allobates sieggreenae sp. nov. and A. trilineatus sensu lato.
 (B) Satellite image of the Ucayali-Tapiche-Yavarí interfluve and neighboring regions with main rivers, cities, and conservation areas labeled (the area of the latter shaded with light green). Centro de Investigaciones Jenaro-Herrera (CIJH) and Río Blanco (RB).

Figure 7. Comparative oscillograms and power spectra (top and bottom graphs of each figure, respectively) of the advertisement call of the holotype of Allobates sieggreenae sp. nov. (A, B)
and a topotypic A. trilineatus (C). (A) Call trill formed by irregularly spaced single notes. (B) Detailed view of three notes of the same call. (D, E) dorsolateral and ventral views of the recorded specimen (MCP 14309).

Figure 3. (A) Lateral view of the holotype (CRBIIAP 1754) of Allobates sieggreenae sp. nov. (B, C) Ventral view of the left hand of the preserved holotype and paratype (MCP 14534, adult female), respectively. (D, E) Ventral view of the left foot of the same aforementioned preserved specimens.
Scale bar = 5 mm (A) and 1 mm (B–E).

Figure 6. Color in life of type specimens, information of specific vouchers not recorded, of Allobates sieggreenae sp. nov.
 (A) Dorsolateral and (B) ventral views of an adult male. (C) Dorsolateral and (D) ventral views of an adult female. (E) An adult male vocalizing with its vocal sac inflated. (F) Dorsolateral and (G) ventral views of a juvenile specimen.


Allobates sieggreenae sp. nov. 



Giussepe Gagliardi-Urrutia, Santiago Castroviejo-Fisher, Fernando J. M. Rojas-Runjaic, Andrés F. Jaramillo, Samantha Solís and  Pedro Ivo Simões. 2021. A New Species of Nurse-Frog (Aromobatidae, Allobates) from the Amazonian Forest of Loreto, Peru. Zootaxa. 5026(3); 375-404. DOI: 10.11646/zootaxa.5026.3.3

New species of nurse frog honours amphibian conservationist Marcy Sieggreen