Byasa genestieri (Oberthür, 1918) Hu & Cotton & Lamas & Duan & Zhang, 2023

Hu, Shao-Ji, Cotton, Adam M., Lamas, Gerardo, Duan, Kuang & Zhang, Xin, 2023, Checklist of Yunnan Papilionidae (Lepidoptera: Papilionoidea) with nomenclatural notes and descriptions of new subspecies, Zootaxa 5362 (1), pp. 1-69 : 28

49. Byasa genestieri (Oberthür, 1918) stat. nov.

Papilio Latreillei Genestieri Oberth ̧r, 1918; Bull. Soc. ent. Fr., 1918 (12): 187; TL: ‘Siao-lou, Tchang-chau-pin et au haut Lou-Tse-Kiang’ [Sichuan and Yunnan ( upper Mekong ), China].

Note: DNA analysis using the COI barcode from the first author’s lab, not previously published, found that the K2P genetic distance ( Kimura 1980) between Byasa genestieri and B. latreillei is 3.38%, and the support value on the IQ-Tree is 0.88 ( Xu 2022). This confirms the findings in a conference presentation by Deodati et al. (2007), who reported significant differences in COI sequences between the two taxa and stated they must be separate species. The main difference in male genitalia is the shape of the superuncus, which in B. latreillei is shorter, smooth and less curved downwardly, while in B. genestieri it is longer, hooked near the tip and evidently curved downwardly ( Figures 6–8 ). The female genitalia of the two are very similar except for the slight difference in lamella postvaginalis ( Figures 9 and 10 ). As a result, we separate Byasa genestieri and B. latreillei as distinct species (stat. nov.). Byasa genestieri comprises two subspecies, both occuring in Yunnan.

Figures

FIGURE 6. Male genitalia of Byasa latreillei latreillei (Donovan, 1826) from Kathmandu, Nepal. All: whole genitalia with right valve removed, R.: ring, V.: right valve, TSU: tegumen, socii, and uncus, Ae.: aedeagus, Ju.: juxta. Scale bar = 1 mm.

FIGURE 7. Male genitalia of Byasa latreillei ticona (Tytler, 1939) from Dulongjiang, Yunnan, China.All: whole genitalia with right valve removed, R.: ring, V.: right valve, TSU: tegumen, socii, and uncus, Ae.: aedeagus, Ju.: juxta. Scale bar = 1 mm.

FIGURE 8. Male genitalia of Byasa genestieri genestieri (Obertḩr, 1918) stat. nov. from Kunming, Yunnan, China.All: whole genitalia with right valve removed, R.: ring, V.: right valve, TSU: tegumen, socii, and uncus, Ae.: aedeagus, Ju.: juxta. Scale bar = 1 mm.

FIGURE 9. Female genitalia of Byasa latreillei ticona (Tytler, 1939) from Yingjiang, Yunnan, China. Scale bar = 1 mm.

FIGURE 10. Female genitalia of Byasa genestieri genestieri (Obertḩr, 1918) stat. nov. from Yangbi, Yunnan, China. Scale bar = 1 mm.