Notes on Polycaena sakaii Sugiyama, 2015 with a new subspecies described from Sichuan, China (Lepidoptera: Riodinidae)

A new subspecies of the butterfly Polycaena sakaii, named P. s. fani, has been identified from Mt. Siguniang in Sichuan, China, based on distinct morphological and molecular differences. This discovery highlights significant genetic divergence within the species, contributing to our understanding of its evolutionary history. The study provides detailed descriptions of adult specimens and male genitalia, along with a phylogenetic analysis and distributional map. These findings underscore the importance of Mt. Siguniang as a biodiversity hotspot within the Sichuan Giant Panda Sanctuaries.

Li, H.-Z. (2026). Notes on Polycaena sakaii Sugiyama, 2015 with a new subspecies described from Sichuan, China (Lepidoptera: Riodinidae). The Indochina Entomologist, 2(60), 613–620. https://doi.org/10.70590/ice.2026.02.60