
![]() A new study and lab collaboration published today in Zootaxa provides the most comprehensive genetic analysis of Harlequin frogs (genus Atelopus) to date. This critically endangered group has suffered dramatic declines, with many species facing extinction. The research, conducted by an international team of scientists led by Stefan Lötters, analyzed genetic data from 152 samples representing 104 populations across the entire geographic range of the genus. The study identified four major evolutionary lineages of Harlequin frogs and revealed significant cryptic diversity, meaning that species that appear similar externally may be genetically distinct. The findings have important implications for the conservation of these threatened amphibians. By improving our understanding of Harlequin frog taxonomy, researchers and conservationists can better prioritize conservation efforts and develop effective strategies to protect these unique and valuable animals. The study also describes two new species of Harlequin frogs from Departamento Loreto in Peru, Atelopus harlequin and Atelopus histrionicus, highlighting the continued importance of taxonomic research in understanding and conserving biodiversity. Citation: Lötters, S., P. Böning, S. Bailon, J. D. Barros Castañeda, R. Boistel , A. Catenazzi, et al. 2025. A roadmap for harlequin frog systematics, with a partial revision of Amazonian species related to Atelopus spumarius. Zootaxa 5571: 1-76.
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