brevicephalis, Thymmallus arcticus Mitrofanov [V. P.] 1971:109 [Biological Sciences, Alma-Ata v. 1; ref. 35968] Lake Markakol, Kazakhstan. No types known. Original genus should have been Thymallus. First appeared as nomen nudum in Mitrofanov 1961:51 [ref. 35969]. •Synonym of Thymallus arcticus (Pallas 1776), but a valid subspecies brevicephalus -- (Mitrofanov et al. 1986:215 [ref. 35970]). •Valid as Thymallus brevicephalus Mitrofanov 1971 -- (Dyldin et al. 2017:111 [ref. 35967], Weiss et al. 2020:[3] [ref. 37974], Dyldin et al. 2024:917 [ref. 41701]). •Valid as Thymallus brevicephalis Mitrofanov 1971. Current status: Unknown. Salmonidae: Thymallinae. Distribution: North Asia: Lake Markakol (Kazakhstan). Habitat: freshwater.