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Medeiros LADE, Gentil E, Kaefer IL, Cohn-Haft M. Distribution and diversification of Adelphobates, emblematic poison frogs from Brazilian Amazonia. AN ACAD BRAS CIENC 2024; 96:e20230659. [PMID: 38655924 DOI: 10.1590/0001-3765202320230659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 11/16/2023] [Indexed: 04/26/2024] Open
Abstract
Adelphobates contains three species, and the inaccurate identification of A. quinquevittatus and the scarcity of records of A. castaneoticus complicate inference of their distributions; the latter species occurs in sympatry with A. galactonotus. Our objective was to revise the distributions of Adelphobates by compiling data and modeling habitat suitability, as range limits may be shaped by landscape features and biotic interactions. We initially analyzed the existence of operational taxonomic units within the nominal species and subsequently inferred the observed and potential distributions, taking into account the possible independent lineages for the three species, and we also generated a molecular timetree to understand the chronology of interspecific diversification events. Adelphobates quinquevittatus was found to have a more easterly distribution than previously described, and specimens with phenotypic variation were found to occur in areas inconsistent with the modeling, and A. castaneoticus was concentrated in the Tapajós-Xingu interfluve, surrounded by A. galactonotus. Models indicated that the right bank of the Xingu River is suitable for both species, indeed, both were found there. Despite Adelphobates species having their distributions delimited by major Amazonian rivers, estimated divergence times predate the formation of the modern river network, suggesting that other mechanisms were involved in their diversification.
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Affiliation(s)
- Larissa A DE Medeiros
- Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André Araújo, 2936, Petrópolis, 69067-375 Manaus, AM, Brazil
| | - Eduardo Gentil
- Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André Araújo, 2936, Petrópolis, 69067-375 Manaus, AM, Brazil
| | - Igor L Kaefer
- Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André Araújo, 2936, Petrópolis, 69067-375 Manaus, AM, Brazil
- Universidade Federal do Amazonas, Instituto de Ciências Biológicas, Av. Rodrigo Otávio, 6200, Coroado I, 69077-000 Manaus, AM, Brazil
| | - Mario Cohn-Haft
- Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Ecologia, Av. André Araújo, 2936, Petrópolis, 69067-375 Manaus, AM, Brazil
- Instituto Nacional de Pesquisas da Amazônia, Coleção de Aves, Coordenação de Pesquisas em Biodiversidade, Av. André Araújo, 2936, Petrópolis, 69067-375 Manaus, AM, Brazil
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Mônico AT, Ferrão M, Chaparro JC, Fouquet A, Lima AP. A new species of rain frog (Anura: Strabomantidae: Pristimantis) from the Guiana Shield and amended diagnosis of P. ockendeni (Boulenger, 1912). VERTEBRATE ZOOLOGY 2022. [DOI: 10.3897/vz.72.e90435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Pristimantis is already the most speciose genus among vertebrates, yet the current number of species remains largely underestimated. A member of the P. unistrigatus species group from the Guiana Shield has been historically misidentified as P. ockendeni, a species described from southern Peru. We combined mitochondrial (16S and COI) and nuclear (RAG1) loci, external morphology, skull osteology (μ-CT scan), vocalization (advertisement and courtship calls), geographic distribution and natural history data to differentiate the Guiana Shield populations from P. ockendeni, and describe them as a new species. The new species is crepuscular and nocturnal and inhabits the understory of unflooded (terra firme) forests in Brazil, Guyana and Suriname. It is phylogenetically related to P. ardalonychus, P. martiae and undescribed species from Brazilian Amazonia. The new species notably differs from P. ockendeni and its congeners in the P. unistrigatus species group occurring in the Guiana Shield by the combination of the following characters: absence of dentigerous processes of vomers, presence of vocal slits in males, body size (SVL 16.2–20.7 mm in males and 21.4–25.7 mm in females), advertisement call (call with 4–6 notes, call duration of 158–371 ms and dominant frequency of 3,466–4,521 Hz) and translucent groin coloration in life. To facilitate the recognition and description of cryptic species previously hidden under the name P. ockendeni, we provide an amended diagnosis of this taxon based on external morphology and advertisement call of specimens recently collected nearby the type locality and additional localities in southwestern Amazonia.
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Torralvo K, Fraga R, Lima AP, Dayrell J, Magnusson WE. Environmental filtering and deforestation shape frog assemblages in Amazonia: An empirical approach assessing species abundances and functional traits. Biotropica 2021. [DOI: 10.1111/btp.13053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Kelly Torralvo
- Programa de Pós‐Graduação em Ecologia Instituto Nacional de Pesquisas da Amazônia Manaus Brazil
| | - Rafael Fraga
- Laboratório de Ecologia e Comportamento Animal Universidade Federal do Oeste do Pará Santarém Brazil
| | - Albertina P. Lima
- Coordenação de Biodiversidade Instituto Nacional de Pesquisas da Amazônia Manaus Brazil
| | - Jussara Dayrell
- Programa de Pós‐Graduação em Ecologia Instituto Nacional de Pesquisas da Amazônia Manaus Brazil
| | - William E. Magnusson
- Coordenação de Biodiversidade Instituto Nacional de Pesquisas da Amazônia Manaus Brazil
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