Microkayla guillei

Microkayla guillei is a small terrestrial frog belonging to the family Craugastoridae, part of a genus of high-Andean amphibians recently split from Psychrophrynella based on molecular and morphological evidence. Like its congeners, it is adapted to life at extreme elevation in the tropical Andes, where cool temperatures and moisture-retaining vegetation shape a highly specialized existence. The species is known only from a very restricted range in the high-altitude puna and montane grassland habitats of Peru, where it likely shelters among rocks, leaf litter, and dense cushion plants or bunch grasses that buffer it from temperature extremes and desiccation.

As with many direct-developing frogs in this group, it probably lays eggs on land, bypassing an aquatic larval stage, which ties its survival closely to consistently damp microhabitats. Microkayla guillei is classified as Critically Endangered (CR) by the IUCN, reflecting its extremely limited known distribution and the fragility of the high-Andean ecosystems it depends on. Habitat degradation from agricultural expansion, livestock grazing, and burning of grassland vegetation are significant concerns across the puna zone, compounded by the broader vulnerability of high-elevation amphibians to shifting precipitation and temperature patterns driven by climate change.

Because the species is only recently described and poorly studied, population size and trends remain unknown, underscoring the urgent need for targeted field surveys. On a positive note, increasing taxonomic attention to the Microkayla radiation has drawn scientific interest to Peru's high-Andean amphibian diversity, and improved understanding of these narrow-range endemics is helping conservationists prioritize survey efforts and advocate for protection of remaining puna habitat fragments before further decline occurs.

This species inhabits specialized microhabitats within tropical forest ecosystems, typically found in areas with specific soil and moisture conditions. It appears to be restricted to very localized environments that support its particular ecological requirements.