Palumbina magnisigna Lee et Li, Lee et Li, 2018

Ga-Eun Lee 1, Houhun Li, Taeman Han & Haechul Park, 2018, A taxonomic review of the genus Palumbina Rondani, 1876 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of twelve new species, Zootaxa 4414 (1), pp. 1-73: 13-14

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Palumbina magnisigna Lee et Li

sp. nov.

Palumbina magnisigna Lee et Li   , sp. nov.

( Figs 1 View FIGURES 1, 2 , 35 View FIGURES 34-39 , 67 View FIGURES 65-72 , 90 View FIGURES 88-93 , 110 View FIGURES 110-113 )

Type material. Holotype ♂, CHINA, Yunnan Province, Mt. Weibao (24.52°N, 98.84°E), 2244 m, Weishan County, 23.vii.2013, leg. Shurong Liu, Yuqi Wang and Kaijian Teng, genitalia slide no. LGE16035 View Materials , DNA voucher no. LGE-G058 GoogleMaps   . Paratypes. Yunnan Province: 2 ♀♀, same data as holotype but 22̄ 23.vii. 201 3, genitalia slide no. LGE16036 View Materials , DNA voucher nos. LGE-G059, LGE-G060 GoogleMaps   ; 1 ♂, Mt. Weibao (24.52°N, 98.84°E), 2200 m, Weishan County, 20.vii.2001, leg. Houhun Li and Xinpu Wang, genitalia slide no. ZJL05408 View Materials GoogleMaps   ; 1 ♂, Hudiequan (25.91°N, 100.1°E), 2030 m, Dali , 2.viii.2005, leg. Yingdang Ren GoogleMaps   ; 1 ♀, Bubang (21.60°N, 101.59°E), 656 m, Xishuangbanna , 24.vii.2014, leg. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu GoogleMaps   ; 3 ♀♀, Mt. Weibao (25.18°N, 100.34°E), 2205 m, Dali , 31.vii ̄ 3.viii. 201 4, leg. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, DNA voucher no. LGE-G045 GoogleMaps   ; 2 ♂♂, Baihualing (25.30°N, 98.80°E), 1473 m, Baoshan , 5̄ 6.viii. 201 4, leg. Kaijian Teng, Shurong Liu and Hua Rong, genitalia slide nos. LGE16379 View Materials , LGE17021 View Materials , DNA voucher no. LGE- G046 GoogleMaps   ; Guangxi Zhuang Autonomous Region: 1 ♂, Fangchenggang City (21.68°N, 107.58°E), 370 m, 9.iv.2002, leg. Shulian Hao and Junhuai Xue, genitalia slide no. JZL05406 View Materials GoogleMaps   ; 1 ♂, 1 ♀, Mt. Daming (23.08°N, 107.14°E), 1250 m, 21.v.2011, leg. Linlin Yang and Yinghui Mou GoogleMaps   ; 1 ♀, Mt. Daqing (22.31°N, 106.71°E), 272 m, Pingxiang , 19.vii.2011, leg. Bingbing Hu GoogleMaps   ; 1 ♀, Shaoping Forest (22.06°N, 106.98°E), 190 m, Pingxiang , 24.vii.2011, leg. Bingbing Hu, DNA voucher no. LGE-G051 GoogleMaps   ; 1 ♀, Shaoping Forest (22.06°N, 106.98°E), 280 m, Pingxiang , 28.iii.2012, leg. Xiaofei Yang, genitalia slide no. LGE16037 View Materials GoogleMaps   ; 1 ♀, Shaoping Forest (22.06°N, 106.98°E), 280 m, Pingxiang , 30.v.2012, leg. Xiaofei Yang, DNA voucher no. LGE-G053 GoogleMaps   ; 1 ♀, Shuolong Town (22.83°N, 106.83°E), Daxin, Chongzuo, 295 m, 6.vii.2013, leg. Xiaofei Yang GoogleMaps   ; Sichuan Province: 1 ♂, 1 ♀, Hailuogou (29.6°N, 102.1°E), 1695 m, Luding County, ̄ 1.vii.2016, leg. Kaijian Teng and Xiaofei Yang, genitalia slide nos. LGE16266 View Materials , LGE16378 View Materials , DNA voucher no. LGE-G424. GoogleMaps  

Description. Adult (Fig. 67). Wingspan 9.0̄1 4.0 mm. Head silvery white to creamy white. Labial palpus white, strongly recurved and longer in female; segment I with outer surface slightly fuscous, segment II as long as III; in male, hair pencil reaching basal 1/3 of segment III, segment III with distal 1/2 fuscous; female with segments II and III often suffused with fuscous on dorsal surface. Antenna with scape white, fuscous distally on posterior margin; flagellum black except dorsal 1/3 white to creamy, cilia as long as width. Thorax and tegula anteriorly fuscous and posteriorly grey, sometimes entirely fuscous. Forewing ground color grey to dark fuscous, with ochreous reflections, dirty-white along fold, suffused with dirty-white scales before apex, sometimes indistinct; markings dirty-white or creamy: antemedian fascia straight, slender; distal streak at anterior 1/3 and 2/3, respectively, lying from distal 1/2 to distal 1/ 3 in parallel: upper distal streak usually slender, slightly upcurved toward costa, lower distal streak shorter, usually curved downward. Hindwing grey to fuscous, with ochreous reflections. Legs silvery-white to ochreous; fore femur, tibia and tarsus black on outer surface; mid tarsus with each segment apically black on outer surface, mostly black on inner surface; hind femur black at base, hind tibia black near tibial spurs, at middle and at apex on outer surface, mostly black on inner surface, hind tarsus with first tarsomere black at middle, remaining tarsomeres ringed with black apically.

Pregenital abdomen (Fig. 35). In male, coremata placed interiorly, about 1/3 length of abdomen; sternum VIII with lateral margin rounded, posteriorly emarginate at middle; tergum VIII posteriorly with a linear sclerite at middle.

Male genitalia (Fig. 90). Uncus short, rounded apically, tongue-shaped. Culcitula absent. Gnathos hook short, curved upward from middle. Tegumen broad, anterior margin broadly concave. Valva as long as tegumen, gradually narrowed from base to basal 4/5, slightly extending outward; distal 1/5 sharply narrowed, slightly incurved, weakly serrate on costa, pointed at apex. Sacculus approximately 1/3 length of valva, curved outward, gradually narrowing toward apex. Anellus lobe club-shaped, about 3/5 length of valva, rounded at apex. Vinculum sub-trapezoidal, nearly straight on posterior margin. Saccus slender, as long as anellus lobe, medially constricted, moderately pointed at apex, slightly exceeding tegumen pedunculi. Juxta simple, V-shaped, with sparse setae at basal 1/3 of inner margin. Aedeagus dilated basally, narrowing toward blunt apex; slender interior sclerite arising from middle, sinuous, exceeding apex.

Female genitalia ( Fig. 110 View FIGURES 110 ). Papillae anales simple. Apophyses anteriores about 1/2 length of apophyses posteriores. Tergum VIII with posterior margin markedly narrowed at middle and forming a dome-shape; sternum VIII with posterior margin dented bilaterally, with deep incision at middle reaching near anterior margin. Ostium bursae large, sub-triangular. Ductus bursae slightly longer than corpus bursae; colliculum broad, between posterior 1/5 and 2/5; ductus seminalis arising from middle. Corpus bursae sub-elliptical; signum large, placed at middle, basal plate rhombiform, with a thick thumb-shaped process arising anteriorly.

Diagnosis. Palumbina magnisigna   sp. nov. is superficially similar to P. oxyprora   , but it can be distinguished by the lower distal streak of the forewing not reaching dorsum, while that of P. oxyprora   does. The wing markings are also similar to those of European species P. guerinii   , but the latter species is yellowish grey and is suffused with dirty-white or creamy scales at base (based on one male and three female specimens loaned from ZMUC which were collected from Greece). The labial palpus of P. magnisigna   sp. nov. has the hair pencil reaching basal 1/3 of segment III, while that of oxyprora   is longer and nearly reaches the apex; the segment III of the latter species is somewhat wider in dorsal view and slightly appressed. Palumbina magnisigna   sp. nov. has the sternum VIII very similar to that of P. oxyprora   , but the coremata are about twice longer in length. Male genitalia are differentiated from those of P. guerinii   and P. oxyprora   by having a broader valva, a sacculus and a saccus. The anellus lobe is almost uniformly long in P. magnisigna   sp. nov., but that of P. oxyprora   are constricted at base and rather dilated distal half bears a long apical bristle. Compared to the two species, P. guerinii   has a shorter and basally broader anellus lobe not exceeding sacculus ( Fig. 88 View FIGURES 88 ), while those of other species are longer and exceed the sacculus. The female genitalia are characterized by the dome-shaped tergum VIII, and the elliptical corpus bursae with a large signum.

Distribution. China (Guangxi, Sichuan, Yunnan).

Etymology. The species name is derived from the Latin magnus (large) and signum (signum), referring to the large size of the signum.

Variations. The color of the female labial palpi is darker than those of male. In female, the labial palpi are often suffused with ochre scales on outer and ventral sides and the dorsal fuscous coloration sometimes runs from distal half of segment II to the apex of segment III. Specimens from Yunnan are larger (wingspan 10.0̄1 4.0 mm, n=9) than those from Guangxi (wingspan 9.0̄1 1.0 mm, n=5) and have darker coloration with longer distal streaks on the forewing.


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