Seven New Diamond Frog Species Identified in Madagascar After 12-Year Investigation

Researchers have formally described seven new species of diamond frog from Madagascar, resolving a taxonomic puzzle that had persisted for more than a decade. The findings, published August 3 in the open-access journal Vertebrate Zoology, bring the total number of recognized species in the genus Rhombophryne to 27.

The project relied on a technique researchers are calling 'museomics': extracting and sequencing DNA from century-old preserved specimens held in natural history museums and comparing it against genetic material collected from frogs in the field. Combined with close study of body shape and recordings of each species' distinct calls, the approach let scientists finally match old species names to the correct genetic lineages, a mismatch that had confused classification for years.

The research team first began encountering frogs that did not match any known description more than 12 years ago, but lacked the tools to resolve their identity until DNA sequencing of historical specimens became more reliable. Madagascar is already recognized as one of the world's most biodiverse and threatened habitats, and the discovery underscores how much of its amphibian diversity likely remains undocumented, information conservationists say is essential for prioritizing habitat protection as deforestation continues across the island.