Ypthima angustipennis Takáhashi, 2000

Ding, Cui-Zhen & Lang, Song-Yun, 2025, Notes on Ypthima persimilis Elwes & Edwards and its closely related species (Lepidoptera, Nymphalidae, Satyrinae), Zootaxa 5659 (1), pp. 117-126 : 124

Ypthima angustipennis Takáhashi, 2000

( Figs. 5 , 9E , 10E )

Ypthima angustipennis Takáhashi, 2000 , Trans. lepid. Soc. Japan 51 (1): 4, figs. 9-14. TL: Tengzhi, Kaohsiung, Taiwan.

Material examined. photo: 1 ♂, “ Taiwan, Nantou Hueisun Exp. Forest 22.-24.X.1998 leg. Mey & Ebert” ( ZMHU) .

Diagnosis. Its differential diagnosis with the sympatric Ypthima taiwana stat. rev. and its continental sibling species Y. microconjuncta is given above in the diagnosis sections of both species, respectively.

Remarks. Based upon the male genitalia and androconial features, the sibling of the insular Ypthima angustipennis is the recently described Y. microconjuncta from Asian mainland (E. Guizhou, S.W. China) ( Table 1 ), as stated below. However, they are easily distinguishable from each other by the wing patterns.

Distribution. China (Taiwan).

Figures

FIGURE 9. Male genitalia of Ypthima spp. A. Y. persimilis: a1. Yunnan, Menghai, SATY0620, LSY; a2. Yunnan, Lüchun, SATY1304, LSY; a3. Yunnan, Nanjian, SATY1305, LSY; a4. Yunnan, Lushui, SATY1307, LSY; a5. INDIA, Manipur, after Eliot (1967: f. 8); a6. BHUTAN, after Eliot (1967: f. 13); B. Y. atra: b1. Yunnan, Ximeng, SATY1071, LSY; b2. Hainan, Lingshui, SATY0623, LSY; b3. Guangxi, Jinxiu, SATY1303, LSY; b4. MYANMAR, N’mai Valley, after Eliot (1967: f. 18); b5. INDIA, Manipur, after Eliot (1967: f. 19); b6. Hainan, after Eliot (1967: f. 20); b7. “N.E. BURMA/Yunnan Exped.”, after Eliot (1967: f. 21); C. Y. taiwana stat. rev.: c1. “Y. formosana”, Taiwan, after Takáhashi (2000: f. 54); c2. “Y. formosana”, Taiwan, after Shirôzu & Shima (1979: Pl. 18: f. 2c); c3. “Y. atra taiwana”, Taiwan, Taidong, traced from Hsu et al. (2021: f. 488); c4. “Y. formosana”, Taiwan, after Eliot (1967: f. 16); c5. “Y. formosana”, Taiwan, after Eliot (1967: f. 17); D. Y. luxurians, Zhejiang, Qingyuan, SATY1187, LSY; E. Y. angustipennis: e1. Taiwan, after Takáhashi (2000: f. 55); e2. Taiwan, Taidong, traced from Hsu et al. (2021: f. 490); F. Y. microconjuncta, holotype, Guizhou, Shibing, SATY1308, CMNH.

FIGURE 10. Male androconia of Ypthima spp. A. Y. persimilis: a1. Yunnan, Menghai, ANDR0092, LSY; a2. Yunnan, Lüchun, ANDR0374, LSY; a3. ditto, ANDR0375, LSY; a4. ditto, ANDR0376, LSY; a5. ditto, ANDR0377, LSY; a6. MYANMAR, Kachin, after Uémura (2023b: f. 1m); B. Y. atra: b1. Guangxi, Jinxiu, ANDR0378, LSY; b2. Hainan, Lingshui, ANDR0102, LSY; b3. Hainan, after Uémura (2023b: f. 1k); b4. Yunnan, Ximeng, ANDR0263, LSY; b5. ditto, ANDR0379, LSY; b6. ditto, ANDR0380, LSY; b7. MYANMAR, Kachin, after Uémura (2023b: f. 1l); C. Y. taiwana stat. rev.: c1. “Y. atra taiwana”, Taiwan, after Uémura (2023b: f. 1j); c2. “Y. formosana”, Taiwan, after Takáhashi (2000: f. 51); c3. “Y. formosana”, Taiwan, after Shirôzu & Shima (1979: Pl. 52: f. 2); D. Y. luxurians: d1. Jiangxi, Mt. Wuyi, after Uémura (2023b: f. 1o); d2. Zhejiang, Qingyuan, ANDR0334, LSY; E. Y. angustipennis: e1. Taiwan, after Takáhashi (2000: f. 52); e2. Taiwan, after Uémura (2023b: f. 1p); F. Y. microconjuncta: f1. holotype, Guizhou, Shibing, ANDR0383, CMNH; f2. paratype, ditto, ANDR0384, LSY.

FIGURES 1–6. Ypthima spp., ♂, upperside (left), underside (right). 1. Y. persimilis, Yunnan, Lüchun, ANDR0376, LSY; 2. Y. atra, Yunnan, Ximeng, LSY; 3. Y. taiwana stat. rev., Taiwan, Nantou, ©ZMHU; 4. Y. luxurians, Zhejiang, Qingyuan, ANDR0334, SATY1187, LSY; 5. Y. angustipennis, Taiwan, Nantou, ©ZMHU; 6. Y. microconjuncta, paratype, Guizhou, Shibing, ANDR0384, SATY1312, LSY.