Erebia (Erebia) demmia B. Warren, 1936, stat. nov. is a species distinct from Erebia (Erebia) pawloskii Ménétriés, 1859 Originally proposed as a subspecies of Erebia (Erebia) theano (Tauscher, 1806) (type locality in Altai Mts.), and currently treated as a subspecies of Erebia (Erebia) pawloskii Ménétriés, 1859 (type locality in Russia: Sakha), Erebia theano demmia Warren, 1936 (type locality in USA: Colorado, San Juan Mountains) is genetically differentiated from them at the species level (Fig. 3a red), e.g., Fst / Gmin statistics for the phylogenetically closest pair (E. theano demmia and E. pawloskii) are 0.34/0.015. Therefore, we propose that Erebia (Erebia) demmia B. Warren, 1936, stat. nov. is a species distinct from Erebia (Erebia) pawloskii Ménétriés, 1859.

Published as part of Zhang, Jing, Cong, Qian, Shen, Jinhui, Song, Leina & Grishin, Nick V., 2025, Advancing butterfly systematics through genomic analysis, pp. 1-201 in The Taxonomic Report of the International Lepidoptera Survey 12 (5) on page 9, DOI: 10.5281/zenodo.16642576