Pieris extensa bhutya Talbot, 1939

Das, Gaurab Nandi, Eitschberger, Ulf, Singh, Navneet & Chandra, Kailash, 2021, A new species of the genus Pieris Schrank, 1801 (Lepidoptera: Pieridae: Pierinae) with taxonomic notes on the Pieris napi group from India, Zootaxa 5004 (4), pp. 501-520 : 513-519

publication ID	https://doi.org/ 10.11646/zootaxa.5004.4.1
publication LSID	lsid:zoobank.org:pub:1F52E880-A352-4949-A937-802A462D9689
persistent identifier	https://treatment.plazi.org/id/03AE8788-A076-DD09-FF56-FAE610BEFE98
treatment provided by	Plazi
scientific name	Pieris extensa bhutya Talbot, 1939
status

Treatment

( Figs 15, 16 View FIGURES 7–16 , 21 View FIGURES 17–21 , 27 View FIGURES 22–27 , 39 View FIGURES 31–39 , 48 View FIGURES 40–48 , 57 View FIGURES 49–57 , 64 View FIGURES 58–64 , 73 View FIGURES 65–73 , 81 View FIGURES 74–81 , 87 View FIGURES 86–87 )

Pieris extensa bhutya Talbot, 1939: 422 (Type locality: “Eastern Bhutan ”). Eitschberger, 1983: 387. Tadokoro et al., 2017: 90. Pieris extensa Poujade ; Sbordoni et al., 2015: 546.

Material examined. India, Arunachal Pradesh, Dibang Valley: 1♂, 1♀, Chigkupani to Pathar- 1, 1936 m, 19.iv.2017, leg. Gayen & Das (gen. vern.) (28723/ H9 , 28724 / H9 , NZCZSI); 2♂♂, Pathar-1 to Bruni, 2245 m, 21.iv.2017, leg. Gayen & Das (gen. vern.) (28725/ H9 , NZCZSI) .

Diagnosis. Forewing length: Male: 30.25–34.16 mm (n = 3); Female: 32.87 mm (n = 1). Summer form (gen. aest.). P. extensa is distinct in its larger size with pure white ground colour and unmarked forewing cell. The eastern Himalayan subspecies P. e. bhutya can be separated from the nominate subspecies P. e. extensa in having a prominent slender cell streak on underside of the hindwing (absent in P. e. extensa ) and the darker and distinct markings on both surfaces.

Spring form (gen. vern.) ( Figs 15, 16 View FIGURES 7–16 ). This form is relatively smaller in size with slightly narrower markings, and the cell streak on the underside of the hindwing is less prominent in basal area while in summer form all markings are prominent. The spring form of P. e. bhutya can be distinguished from its close relatives P. e. extensa and P. e. yunnansia Tadokoro & Wang, 2014 (from Yunnan), by the presence of a reduced postdiscal spot in space 3 on the upperside of forewing and a slightly traceable cell streak on the underside of hindwing, whereas, P. e. yunnansia having a faint postdiscal spot and unmarked hindwing cell, and in nominate subspecies all the markings are absent.

Male genitalia ( Figs 39 View FIGURES 31–39 , 48 View FIGURES 40–48 , 57 View FIGURES 49–57 , 64 View FIGURES 58–64 , 73 View FIGURES 65–73 ). Quite different and larger in size in comparison to its closely related species: P. tadokoroi , sp. nov., P. ajaka , P. melaena , and P. erutae . Juxta is quite different in its V-shape with long, and broad arms and a small plate. The length ratio between uncus (1 mm) and tegumen (1.2 mm) of P. e. bhutya is 4:5 which is 5: 5 in its Indian relatives. Furthermore, P. e. bhutya is distinct from its sister subspecies (P. e. extensa and P. e. yunnansia) by a more angled, pointed valva (in lateral view) with convex ventral margin and smoothly bent uncus tip, which is quadrangular in shape in P. e. yunnansia and the nominate subspecies with a straight uncus.

Female genitalia ( Fig. 87 View FIGURES 86–87 ). Distinct from its Indian relatives ( P. tadokoroi , sp. nov., P. ajaka , P. melaina and P. erutae ) in its larger size and in having a very large, globular shaped appendix bursae. It can be diagnosed for its unique, distinctive inner genital plate with a slender shaped upper lobe and a very broad, triangular shaped lower lobe attached to lamella antevaginalis. It is distinct from its Indian relatives in having longer ductus bursae with a small, globular shaped corpus bursae. The signum of P. e. bhutya is very large, which is clearly bilobed and cordiform with small projecting teeth, and a long tail (flagellum).

MAP 1. a. Maps depicting the known distribution range of Indian Pieris napi -group. b. Depicting the provenance of Pieris tadokoroi , sp. nov. and historical records of Pieris ajaka Moore , from Himachal Pradesh.

Androconia ( Fig. 81 View FIGURES 74–81 ). P. e. bhutya is distinct from its Indian relatives ( P. tadokoroi , sp. nov., P. ajaka , P. melaina and P. erutae ) in its smaller scent gland (average width 13.4 μm), and shorter, opened arms of lamina. Further- more, in P. e. bhutya lamina is slender with shorter arms in summer form, while in spring form, lamina is thicker (than in summer form), and sometimes arms are obsolete, whereas, in P. e. extensa it is almost uniform in both forms (slender lamina with short arms), and in P. e. yunnansia lamina is variable.

Distribution. Eastern Bhutan and NE India (Arunachal Pradesh).

References

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No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.

Taxonomy

Kingdom	Plantae
Phylum	Tracheophyta
Class	Magnoliopsida
Order	Ericales
Family	Ericaceae
Genus	Pieris