A new nurse frog of the Allobates tapajos species complex (Anura: Aromobatidae) from the upper Madeira River, Brazilian Amazonia

Cryptic diversity is extremely common in widespread Amazonian anurans, but especially in nurse frogs of the genus Allobates. There is an urgent need to formally describe the many distinct but unnamed species, both to enable studies of their basic biology but especially to facilitate conservation of...

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Bibliographic Details
Published in:PeerJ (San Francisco, CA) CA), 2022-08, Vol.10, p.e13751-e13751
Main Authors: Ferrão, Miquéias, Hanken, James, Lima, Albertina P
Format: Article
Language:English
Subjects:
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Allobates
Amphibians
Analysis
Bats
Benzocaine
Biodiversity
Breeding behavior
Candidate species
Congeners
Conservation
Cytochrome
Frogs
Genes
Males
Morphology
New species
Nurses
Phylogenetics
Phylogeny
Riparian forest
Riparian forests
Rivers
Taxonomy
Zoology
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Summary:Cryptic diversity is extremely common in widespread Amazonian anurans, but especially in nurse frogs of the genus Allobates. There is an urgent need to formally describe the many distinct but unnamed species, both to enable studies of their basic biology but especially to facilitate conservation of threatened environments in which many are found. Here, we describe through integrative taxonomy a new species of the Allobates tapajos species complex from the upper Madeira River, southwestern Amazonia. Species delimitation analyses based on molecular data are congruent and delimit five candidate species in addition to A. tapajos sensu stricto. The new species is recovered as sister to A. tapajos clade F, a candidate species from Teles-Pires River, southeastern Amazonia. The new species differs from nominal congeners in adult and larval morphology and in male advertisement call. Egg deposition sites differ between east and west banks of the upper Madeira River, but there is no evidence of corresponding morphologic or bioacoustic differentiation. The new species appears to be restricted to riparian forests; its known geographic range falls entirely within the influence zone of reservoirs of two large dams, which underscores the urgent need of a conservation assessment through long-term monitoring. This region harbors the richest assemblage of Allobates reported for Brazilian Amazonia, with six nominal species and four additional candidate species awaiting formal description.
ISSN:2167-8359
2167-8359
DOI:10.7717/peerj.13751