♂(dsf), Loei, Thailand. (photo by RIEB)		♀(dsf), Loei, Thailand. (photo by RIEB)
♂(dsf), Loei, Thailand. (photo by RIEB)		♀(dsf), Loei, Thailand. (photo by RIEB)
♂ (wsf), Loei, Thailand. (photo by THNHM)		♀ (wsf), Loei, Thailand. (photo by THNHM)
♂ (wsf), Loei, Thailand.		♂ (wsf), Loei, Thailand.

ON : Ypthima yunosukei Aoki & Uémura, 1984 OD : Tokurana (6/7):81-82, figs.9f-g,10(♂genitalia),32(HT,♂),33(PT,♀), col.pl.5, figs.1,5(HT,♂,♂Un), 2,6(PT,♀,♀Un). TL : "Phukadung" [Phu Kradueng], Thailand. (♂, RIEB) Distribution : Thailand (Loei).

Holotype ♂, 10.Feb.1975. "Phukadung" [Phu Kradueng], Thailand. Y.Kimura (RIEB. examined.)
Paratypes : 1♂ 1♀, 10.Feb.1975. "Phukadung" [Phu Kradueng], Thailand. Y.Kimura ; 1♂, 11.Feb.1975. "Phukadung" [Phu Kradueng], Thailand. Y.Kimura

[ THAILAND ]
Ypthima sakra austeni ; Ek-Amnuay,[2007] : 302, pl.123, fig.S102,♀[♂](Un). (in part)
Ypthima sakra austeni ; Ek-Amnuay,2012 : 302, pl.123, figs.N138,♀[♂],♀[♂](Un). (Loei)
Ypthima yunosukei ; Kimura et al.,2016 : 199, figs.♂,♂(Un),♂,♂(Un),♀,♀(Un),♀,♀(Un). (Phu Kradung)

[ THAILAND ]
Loei (Phu Kradueng dist ; Phu Ruea dist.) : 14♂ 6♀ (incl. photo).

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This is a very localized species and is currently considered endemic to Thailand. Hitherto it has been found in several locations in Loei province, but the butterfly is very common in its habitat.

Aoki T. & Uémura, Y.,1984 : Studies on the genus Ypthima (Lepidoptera: Satyridae) in Thailand.
Tokurana (6/7):71-103, 43 figs, 1 col.pl., 8 figs.

♂ (dsf), Loei, Thailand.	♀ (dsf), Loei, Thailand.
♂ (wsf), Loei, Thailand.	♂ (wsf), Loei, Thailand.
♀ (dsf), Loei, Thailand.	♀ (dsf), Loei, Thailand.

1998.12.07 - 2022.09.30.