Thiotricha emarginata, Lee & Li, 2024

Lee, Ga-Eun & Li, Houhun, 2024, A taxonomic review of Thiotricha Meyrick, 1886 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of 84 new species, Zootaxa 5449 (1), pp. 1-222 : 132-134

Thiotricha emarginata sp. nov.

( Figs 19C , 27D , 28B , 42F , 43H , 59E )

Type material. Holotype ♂, CHINA, Zhejiang Province, Jiangshan City, Shuangxikou Town, Laofoyan Village (28.35°N, 118.63°E), 424 m, 7.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu, genitalia slide no. LGE18714 . Paratypes. CHINA: Zhejiang Province: 15 ♂♂, 11 ♀♀, same data as holotype except 7–9.viii.2016 , genitalia slide no. LGE18725f; 1 ♀, Chanyuansi, 350 m, Mt. Tianmu , 15.viii.1999, leg. Houhun Li et al.; 4 ♂♂, 2 ♀♀, Wuyanling (27.35°N, 119.92°E), 680 m, Taishun County, 28.vii–2.viii.2005, leg. Haili Yu , genitalia slide nos. ZJL05380f, ZJL05382m, ZJL05419m, ZJL05488m; 3 ♂♂, 1 ♀, Qingliangfeng , 900 m, Lin’an County, 11.viii.2005, leg. Yunli Xiao , genitalia slide nos. ZJL05388m, ZJL05410m; 5 ♂♂, 3 ♀♀, Wuyanling (27.35°N, 119.92°E), 790 m, Taishun County, 2, 3.viii.2007, leg. Qing Jing ; 1 ♀, Shunxi, 420 m, Linan City , 11.viii.2007, leg. Qing Jin ; 2 ♂♂, Mt. Jiulong , 400 m, 6.viii.2011, leg. Linlin Yang and Na Chen , genitalia slide nos. LLJ14064, LGE18722; 1 ♀, Laoan (30.33°N, 119.40°E), 555 m, Mt. Tianmu , 19.viii.2014, leg. Aihui Yin, Qingyun Wang and Suran Li ; 4 ♀♀, Jiufucun (30.09°N, 118.93°E), 520 m, Mt. Longtang , 27–31.viii.2014, leg. Aihui Yin, Qingyun Wang and Suran Li , genitalia slide no. LGE15018; 1 ♀, Shuiman Town (18.88°N, 109.67°E), 766 m, Wuzhishan City , 7.vii.2015, leg. Qingyun Wang, Suran Li and Mengting Chen ; 5 ♂♂, 3 ♀♀, Simingshan National Forest Park (29.72°N, 121.07°E), 822 m, Ningbo City , 31.vii−2.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu ; 1 ♂, Taohuadao (29.83°N, 122.27°E), 62.9 m, Zhoushan City , 4.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu ; 2 ♂♂, 2 ♀♀, Huangtianhu (27.93°N, 119.68°E), 787 m, Jingning County, 11.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu , genitalia slide no. LGE 18724m; 14 ♂♂, 15 ♀♀, Wangdongyang Wetlands Reserves (27.67°N, 119.63°E), 1301 m, Jingning County, 12.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu ; 41 ♂♂, 24 ♀♀, Baishanzu Nature Reserves (27.73°N, 119.17°E), 1149 m, Qingyuan County, 13–17.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu , genitalia slide nos. LGE 18738m, LGE 18739m; 2 ♂♂, 6 ♀♀, Shimendong (28.27°N, 120.1°E), 102 m, Qingtian County, 20–22.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu ; 2 ♂♂, 1 ♀, Linkeng Village (28.53°N, 120.7°E), 387 m, Yongjia County, 23, 27.viii.2016, leg. Qingyun Wang, Meiqing Yang and Ping Liu ; 1 ♀, Gutianshan (29.24°N, 118.11°E), 412 m, Quzhou City , 6.vii.2017, leg. Zhenguo Zhang, Yanyan Jia and Juan Li , genitalia slide no. LGE18737; 1 ♂, Gutianshan (29.24°N, 118.11°E), 412 m, Quzhou City , 25.viii.2017, leg. Shuonan Qian, Yanyan Jia and Juan Li , genitalia slide no. LGE18731; 1 ♂, 2 ♀♀, Mt. Jiulong (28.39°N, 118.84°E), 509 m, Lishui City , 27, 28.viii.2017, leg. Shuonan Qian, Yanyan Jia and Juan Li , genitalia slide nos. LGE17248f, LGE 17249m; 1 ♂, Fuze Village (29.34°N, 119.13°E), 144 m, Chun’an County, 2.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu ; 7 ♂♂, 6 ♀♀, Datou Village (29.10°N, 118.45°E), 707 m, Quzhou City , 5– 8.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu , genitalia slide no. LGE 18726m; 2 ♂♂, 3 ♀♀, Laofoyan Village (28.21°N, 118.41°E), 465 m, 10–12.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu ; 25 ♂♂, 24 ♀♀, Gutianshan (29.14°N, 118.07°E), 416 m, Kaihua County, 13–15.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu ; 6 ♂♂, 5 ♀♀, Wangdongyang Wetlands Reserves (27.41°N, 119.38°E), 1174 m, Jingning County, 16, 17.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu , genitalia slide no. LGE18729f; 3 ♂♂, 6 ♀♀, Longwantan (28.22°N, 120.52°E), 127 m, Yongjia County, 20–22.viii.2018, leg. Shuai Yu, Mengran Xing and Chen Liu ; Anhui Province: 2 ♂♂, 2 ♀♀, Tangkou Town, Huangshan City , 4, 5.viii.2004, leg. Jiasheng Xu and Jialiang Zhang , genitalia slide nos. ZJL05425m, ZJL05432m; Fujian Province: 1 ♀, Guadun, 1100 m, Mt. Wuyi , 29.vii.2008, leg. Weichun Li, Yongling Sun and Haiyan Bai ; Guangdong Province: 1 ♀, Mt. Babao, 1070 m, Nanling , 23.viii.2010, leg. Shulian Hao ; Guangxi Zhuang Autonomous Region : 2 ♂♂, Mt. Pinglong (22.15°N, 107.98°E), 510 m, Shangsi , 6.iv.2002, leg. Shulian Hao and Huaijun Xue , genitalia slide nos. ZJL05200, ZJL05437; 1 ♂, Huaping Nature Reserves (24.85°N, 106.38°E), 1300 m, 1.viii.2006, leg. Weichun Li ; 1 ♀, Mt. Daming , 1250 m, 21.v.2011, leg. Linlin Yang and Yinghui Mou ; 1 ♀, Shaoping Forest (22.06°N, 106.98°E), 190 m, Pingxiang , 25.vii.2011, leg. Bingbing Hu et.al.; 1 ♀, Mt. Daming, 1200 m, Nanning City , 7.viii.2011, leg. Shulian Hao and Yinghui Sun ; 1 ♂, Hekou Conservation Station (24.14°N, 110.09°E), 823 m, Dayaoshan Nature Reserves, Jinxiu , 18.vii.2015, leg. Mujie Qi and Shengnan Zhao ; Hainan Province: 1 ♀, Wuzhishan Nature Reserves (18.90°N, 109.67°E), 740 m, 15.iv.2009, leg. Qing Jin and Bingbing Hu ; 1 ♂, 1 ♀, Yinggeling (19.08°N, 109.50°E), 620 m, 6, 14.iv.2010, leg. Bingbing Hu and Jing Zhang ; 1 ♂, Limushan Nature Reserves (19.17°N, 109.73°E), 632 m, 29.vi.2015, leg. Qingyun Wang, Suran Li and Mengting Chen ; 8 ♂♂, 2 ♀♀, Shuiman Town (18.88°N, 109.67°E), 766 m, Wuzhishan City , 5–7.vii.2015, leg. Qingyun Wang, Suran Li and Mengting Chen , genitalia slide nos. LGE18748f, LGE18760f; 1 ♀, Qixianling National Forest Park (18.70°N, 109.68°E), 302 m, 9.vii.2015, leg. Qingyun Wang, Suran Li and Mengting Chen ; 1 ♂, Tianchi (18.73°N, 108.87°E), 787 m, Jianfengling , 13.vii.2015, leg. Qingyun Wang, Suran Li and Mengting Chen ; 1 ♂, Wuzhishan Nature Reserves (18.90°N, 109.67°E), 738 m, 24.vii.2016, leg. Xia Bai, Shuonan Qian and Wanding Qi ; Hunan Province: 1 ♀, Yueyan Forest, Dao County, Yongzhou City , 22.viii.1982, leg. Xinwang Tong , genitalia slide no. LGE18763; Jiangxi Province: 3 ♂♂, 6 ♀♀, Mt. Sanqing, 400 m, Dexing City , 5.viii.1985, leg. Guangpu Shen , genitalia slide nos. ZJL05137f, ZJL05278f, ZJL05495m, ZJL05497f; Yunnan Province: 1 ♂, 2 ♀♀, Bubang (21.6°N, 101.59°E), 650 m, Mengla County, 22–25.viii.2005, leg. Yingdang Ren , genitalia slide nos. ZJL05420m, LGE18762f; 1 ♀, Wenquan (24.97°N, 103.01°E), Kunming , 1900 m, 30.viii.2005, leg. Yingdang Ren , genitalia slide no. LGE18772; 2 ♀♀, Taiyanghe Nature Reserves (22.79°N, 100.98°E), 1450 m, 11.vi, 19.viii.2014, leg. Zhenguo Zhang ; 1 ♂, Taiyanghe Nature Reserves, Pu’er City , 8.vi.2015, leg. Zhenguo Zhang.

Diagnosis. This species is very similar to T. lata superficially, and the differences are stated under the latter species. The forewing markings of T. emarginata also resemble those of T. pediformis , but the short streak present near the tornus of T. emarginata is absent in the latter. The male genitalia of T. emarginata are diagnosed by the valva emarginate at distal 1/3 of the ventral margin. The female genitalia could be confused with those of T. pediformis , but the anterior margin of sternum VIII is broadly U-shaped in T. emarginata whereas it is narrowly U-shaped in the latter species.

Description. Adult ( Fig. 19C ). Wingspan 7.5−11.0 mm. Head glossy white. Labial palpus white, with segment I very short; segment III fuscous ventrally and apically, slightly longer than II. Antenna with scape glossy white; flagellum dark fuscous except basal 1/3 or 1/4 of dorsal surface white, male cilia as long as diameter. Thorax and tegula glossy white. Forewing glossy white or creamy white, anterior edge of costa black in basal 1/3 or 1/2, markings dark fuscous: a wedge-shaped costal streak from between distal 1/4 and 1/3 of wing, attenuated distally, obliquely running toward apex and nearly reaching apical spot, followed by and confluent with a shorter costal streak extended from distal 1/5; beyond this suffused with light brown scales before apex; apical spot round or elliptical, sometimes shortly extending along termen as a slender line, its inner margin slightly suffused with grey; a grey suffusion along dorsum from near base to 2/3, followed by an inwardly directed V-shaped marking, the upper fork of this nearly reaching apical spot and often confluent with costal streaks, the lower fork much shorter and running along fold; a short dark longitudinal streak near tornus, running almost in parallel with the lower fork of former marking but not reaching it; fringe on apical area creamy white with subterminal and terminal black bands, produced downwards and bifurcate; fringe on termen grey except basal half white, near apex with a row of coarse metallic fuscous ciliation; fringe on dorsum whitish grey. Hindwing grey except subapex white and apex black; fringe whitish grey except apical area white with a terminal black band. Legs white; fore coxa suffused with fuscous in anterior 2/3; fore femur, tibia and tarsus fuscous on outer surface; mid and hind tibiae with a short dark fuscous streak near apex, respectively; mid and hind tarsi with first tarsomere broadly dark fuscous at middle, II–III tarsomeres dark fuscous in basal half.

Abdominal segments ( Figs 27D , 28B ). In male, sternum VIII 1/5 length of abdomen; lateral margins deeply concave in basal 4/5, then convex posteriorly; posterior 1/3 bifurcate, inner margin of two tines forming a U-shape, somewhat pointed apically; tergum VIII sclerotized as a trapezoidal plate, bearing long coremata bilaterally and large petal-like scales mediolaterally. In female, posterior margin of tergum VII deeply concave in V-shape and shortly sclerotized, with a bundle of stiff scales.

Male genitalia ( Figs 42F , 43H ). Uncus broad, mitre-shaped. Gnathos hook long and very slender. Tegumen 1.5 times as long as uncus, with a median line near anterior margin. Valva broad, slightly curved outward distally; ventral margin broadly convex in basal 2/3, emarginate at 2/3, then bulged before apex; apex narrowed, truncate. Anellus lobe short, ditigate, sparsely setose. Juxta strongly convex medially, hummock-like. Vinculum simple, narrowed. Saccus very short and slender, elongate sub-triangular, rarely bifurcate apically. Aedeagus narrowing from base to apex, constricted at basal 2/5 and before apex, respectively, rounded at apex.

Female genitalia ( Fig. 59E ). Papillae anales weakly sclerotized. Apophyses anteriores approximately 1/2 length of apophyses posteriores. Sternum VIII longer than tergum VIII, weakly sclerotized except anterior and posterior margins; anterior margin broadly U-shaped. Ostium bursae opening near anterior margin of sternum VIII. Ductus bursae narrowed in basal 1/3 or 2/5, then abruptly broadened, with a linear sclerite arising from base and reaching colliculum; colliculum situated near base, ductus seminalis arising from posterior 1/3 or 2/5. Corpus bursae elliptical, slightly longer than ductus bursae, rarely 3 times as long as ductus bursae; signum rounded, consisting of minute denticles, placed at posterior 2/5 or 1/3.

Distribution. China (Anhui, Fujian, Guangdong, Guangxi, Hainan, Hunan, Jiangxi, Yunnan, Zhejiang).

Etymology. The species name is from Latin, emarginatus (emarginate), referring to the emarginate distal 1/3 of valva.

Remarks. The species name was suggested by Jialiang Zhang who previously studied Chinese Thiotricha in NKU.

Figures

FIGURE 19. Adults of Thiotricha spp. A, T. lata sp. nov., ♂, holotype; B, ditto, ♂, paratype; C, T. emarginata sp. nov., ♂, holotype; D, T. pediformis sp. nov., ♂, holotype; E, T. curviciliaris sp. nov., ♂, holotype; F, ditto, enlarged view of costal ciliation; G, T. recticiliaris sp. nov., ♂, holotype; H, ditto, enlarged view of costal ciliation.

FIGURE 27. Male sternum VIII of Thiotricha spp.A, T. asymmetricosta sp. nov.; B, T. aurea sp. nov.; C, T. lata sp. nov.; D, T. emarginata sp. nov.; E, T. pediformis sp. nov.; F, T. curviciliaris sp. nov.; G, T. recticiliaris sp. nov.; H, T. clinopeda Meyrick; I, T. oxygramma Meyrick; J, T. parvimaculata sp. nov.; K, T. apicidisca sp. nov.; L, T. villosa sp. nov.; M, T. flaviterminata sp. nov.; N, T. hamatisigna sp. nov.; O, T. acicularis sp. nov.; P, T. rosegrammica sp. nov.; Q, T. canimaculata sp. nov.; R, T. hoplomacha Meyrick; S, T. embolarcha Meyrick; T, T. hexanesa Meyrick; U, T. acrantha Meyrick; V, T. scotaea Meyrick; W, T. dissobola Meyrick; X, T. pyrphora Meyrick.

FIGURE 28. Male tergum VIII and coremata of lata-group species. A, T. lata sp. nov.; B, T. emarginata sp. nov.; C, T. pediformis sp. nov.; D, T. curviciliaris sp. nov.; E, T. recticiliaris sp. nov.; F, T. clinopeda Meyrick; G, T. oxygramma Meyrick; H, T. parvimaculata sp. nov.

FIGURE 42. Male genitalia of Thiotricha spp. A, T. poecilopa (Meyrick), slide no. LGE16135; B, T. scatebrosa (Meyrick), slide no. LGE18342; C, T. asymmetricosta sp. nov., holotype, slide no. LGE18188; D, T. aurea sp. nov., holotype, slide no. LGE18616; E, T. lata sp. nov., holotype, slide no. LGE18745; F, T. emarginata sp. nov., holotype, slide no. LGE18714 (Scale bars = 0.2 mm).

FIGURE 43. Male genitalia and enlarged view of anellus lobes of Thiotricha spp. A, I, T. pediformis sp. nov., holotype, slide no. LGE18732; B, J, T. curviciliaris sp. nov., holotype, slide no. LGE18750; C, K, T. recticiliaris sp. nov., holotype, slide no. LGE18765; D, L, T. clinopeda Meyrick, slide no. LGE18783; E, M, T. oxygramma Meyrick, slide nos. LGE18788 and LGE18357, respectively; F, T. parvimaculata sp. nov., holotype, slide no. LGE18247; G, T. lata sp. nov., paratype, slide no. LGE18756; H, T. emarginata sp. nov., holotype, slide no. LGE18714 (Scale bars = 0.2 mm).

FIGURE 59. Female genitalia of Thiotricha spp. A, T. scatebrosa (Meyrick), slide no. LGE16130; B, T. asymmetricosta sp. nov., paratype, slide no. LGE18190; C, T. aurea sp. nov., paratype, slide no. LGE18192; D, T. lata sp. nov., paratype, slide no. LGE18754; E, T. emarginata sp. nov., paratype, slide no. LGE18729; F, T. pediformis sp. nov., paratype, slide no. LGE18797 (Scale bars = 0.4 mm).