ON : Lethe gemina yongreni Huang, 2021 OD : Atalanta 52(3):345, fig.179, ♂(HT),♂(HT,Un),5♂♂(PT),5♂♂(PT,Un). TL : Mohan, Mengla County, Xishuangbanna, Yunnan, China. (BSNU) Distribution : SC.Yunnan (Xishuangbanna), CN.Thailand, CE.Laos. ● ssp.yongreni ● ssp.yao

Holotype ♂, 2.Oct.2017, Mohan, ca.1100m, Mengla County, Xishuangbanna, Yunnan province, China, Y.-R.Zhang leg. (BSNU)
Paratypes 12♂ (CHH), same locality as Holotype.

[ THAILAND ]
Lethe gemina yao ; Saito & Inayoshi,2018 : 29, fig.13,♂(Un). (Phetchabun)
Lethe gemina yao ; S.Sophonviwatkul, C.Sunthornwiphat & T.Laola,2023- : Butterflies of Thailand, fig. (Phetchabun) (accessed: 2023.06.30)
Lethe gemina yongreni ; Huang,2021 : 352-353. (Thailand)

[ LAOS ]
Lethe gemina ; Osada, Uémura & Uehara,1999 : 210, pl.90, fig.♀. (Lak Sao)
Lethe gemina ssp. ; Uémura,2003 : 5, fig.36,map.
Lethe gemina yao ; Uémura,2006 : 4.
Lethe gemina yao ; Nakamura & Wakahara,2012 : 48.
Lethe gemina yongreni ; Huang,2021 : 352-353. (Laos)

[ THAILAND ]
Phetchabun : Khao Kho dist., 2015.10.04. 1♂ (photo by K.Yano).

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This is the first record from Thailand.
A photo was taken by Koichi Yano in Khao Kho dist., Phetchabun on 4.Oct.2015, but no specimens are available yet. Therefore, details are unknown. I tentatively treat the populations from Thailand and Laos as ssp.yongreni rather than ssp.yao. Further taxonomic studies with specimens are needed.

Huang, H.,2021 : New or little known butterflies from China - 4 (Lepidoptera: Pieridae, Nymphalidae, Riodinidae, Lycaenidae et Hesperiidae).
Atalanta 52(3):345-413.

♂, 2015.10.04. Phetchabun, Thailand. (photo by K.Yano)

2024.10.31.