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Friday, June 27th, 2025
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| 10:12a | [Herpetology • 2024] Scinax ushiniauae • A New Species of the Scinax cruentomma group (Anura: Hylidae) from the Ucayali River Basin of Loreto, Peru
Abstract We describe a new species of the Scinax cruentomma species group, with a red streak in the iris and a weakly bilobate vocal sac. It is known from oligotrophic soils in the sedimentary basin of the Ucayali River near Jenaro Herrera (province of Requena, Peru) and Río Blanco (buffer zone of the Matses Indigenous territory and reserve). The new species can be distinguished from the other species of the S. cruentomma group by its small snout-vent length, body and iris color patterns, weakly bilobate vocal sac, myological characters, and the number of notes and pulses of the advertisement call. It is morphologically most similar to S. strussmannae, from which the advertisement call, nostril, canthus rostralis, and loreal region can distinguish it. Amphibia, Amazon basin, bioacoustics, mating call, sp. nov., varillal, taxonomy, white-sand forests   Scinax ushiniauae Giussepe GAGLIARDI-URRUTIA, Katyuscia ARAUJO-VIEIRA, José M. PADIAL, Pedro Ivo SIMÕES, Julián FAIVOVICH and Santiago CASTROVIEJO-FISHER. 2024. A New Species of the Scinax cruentomma group (Anura: Hylidae) from the Ucayali River Basin of Loreto, Peru. Zootaxa. 5406(3); 401-420. DOI: doi.org/10.11646/zootaxa.5406.3.1 [2024-02-07] Descubren nueva especie de rana en nuestra Amazonía Importante hallazgo lo hicieron especialistas del IIAP, entidad del Ministerio del Ambiente en la cuenca del río Ucayali. | ||
| 10:29a | [PaleoOrnithology • 2024] Chloephaga dabbenei • Pleistocene Record of Chloephaga Eyton, 1838 (Anseriformes: Anatidae) in the Argentine Pampas, with the Description of A New Species
The genus Chloephaga Eyton, 1838, consisting of four species that breed in Patagonia, encompasses anatids endemic to South America. Despite their prominence in the present-day avifauna, these species have left behind a limited fossil record. The aim of the present contribution is to describe Chloephaga fossils coming from Middle Pleistocene levels (San José Sequence) cropping out at Bajo San José site, southwestern Buenos Aires Province, Argentina. The specimens are referred to three different taxa, including a new species, Chloephaga dabbenei n. sp., a smaller but indeterminate taxon, which is also probably a new species, and the extant species C. picta (J.F.Gmelin, 1789). The newly described species is notably large, falling within the upper size range observed in males of C. picta. The tarsometatarsus is straight-shafted with poorly divergent distal trochleae, features that are correlated with cursorial habits, that are absent in other members of Chloephaga. The co-occurrence of three species of the genus Chloephaga is registered nowadays in the Argentine Patagonia and in the southeast of Buenos Aires Province, when they migrate during the winter season. Keywords: Sheldgoose, Tadorninae, fossil diversity, Buenos Aires Province, Quaternary, new species   Chloephaga dabbenei sp. nov. Federico Lisandro AGNOLÍN, Gerardo P. ÁLVAREZ HERRERA and Rodrigo TOMASSINI. 2024. Pleistocene Record of Chloephaga Eyton, 1838 (Anseriformes: Anatidae) in the Argentine Pampas, with the Description of A New Species. Comptes Rendus Palevol. 23(18); 241-255. DOI: 10.5852/cr-palevol2024v23a18 [21 June 2024]  |
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