A taxonomic review of Thiotricha Meyrick, 1886 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of 84 new species Lee, Ga-Eun Li, Houhun Zootaxa 2024 2024-05-15 5449 1 1 222 Lee & Li, 2024 Lee & Li 2024 [151,409,294,321] Insecta Gelechiidae Thiotricha Animalia Lepidoptera 119 120 Arthropoda species nullisigna sp. nov.  ( Figs 18A, 26Q, 41E, 58D)   Type material.   Holotype ♂, CHINA, Hainan Province, Mt. Wuzhi( 18.91°N, 109.70°E),  732 m,  5.viii.2017, leg. Xia Bai, Ping Liuand Shuai Yu, genitalia slide no. LGE18567.   Paratypes. CHINA: Hainan Province: 1 ♂, Mt. Diaoluo( 18.67°N, 109.94°E),  940 m,  2.vi.2007, leg. Zhiwei Zhangand Weichun Li, genitalia slide no. LGE18388; 1 ♂, Nanchahe( 19.22°N, 109.43°E),  600 m, Bawangling,  10.vi.2007, leg. Zhiwei Zhangand Weichun Li;  1 ♀, Tianchi( 18.74°N, 108.84°E),  1050 m, Jianfengling, Ledong County,  29.iv.2013, leg. Yinghui Sun, Wei Guanand Tengteng Liu;  1 ♀, Hongxin Village( 19.08°N, 109.52°E),  430 m, Yuanmen, Baisha County,  18.iv.2014, leg. Tengteng Liu, Wei Guanand Xuemei Hu;  1 ♂, 9 ♀♀, Limushan Nature Reserves( 19.17°N, 109.74°E),  640 m, 1,  2.v.2014, leg. Tengteng Liu, Wei Guanand Xuemei Hu, genitalia slide nos. LGE15035f, LGE18310f; 1 ♀, Limushan ForestPark ( 19.17°N, 109.73°E),  607 m,  24.vii.2014, leg. Peixin Cong, Linjie Liuand Sha Hu;  1 ♂, Tianchi( 18.73°N, 108.87°E),  787 m, Jianfengling,  14.i.2016, leg. Qingyun Wang, Suran Liand Shengnan Zhao, genitalia slide no. LGE18304; 1 ♀, Mt. Wuzhi( 18.91°N, 109.70°E),  732 m,  4.viii.2017, leg. Xia Bai, Ping Liuand Shuai Yu;  1 ♀, Mingfenggu( 18.74°N, 108.84°E),  954 m, Jianfengling,  9.viii.2017, leg. Xia Bai, Ping Liuand Shuai Yu;   Chongqing Municipality: 2 ♀♀, Beipo,  800 m, Mt. Jinfo, 24,  27.viii.2014, leg. Xiaofei Yang, genitalia slide no. LGE18578;   Guangxi Zhuang Autonomous Region: 1 ♂, Yangmeiao( 25.29°N, 109.31°E),  1180 m, Huanjiang County, Hechi,  24.vii.2015, leg. Meiqing Yangand Ga-Eun Lee;   Jiangxi Province: 1 ♀, Mt. Jiulian,  20.vii.2006, leg. Jiasheng Xuand Weichun Li;   Taiwan Province: 2 ♀♀, Mt. Fu,  420 m,  Yilan, Taibei,  31.vii.2006, leg. Houhun Liand Xicui Du, genitalia slide nos. LGE18568, LGE18569;   Zhejiang Province: 1 ♂, 1 ♀, Wuyanling( 27.35°N, 119.92°E),  400– 680 m, Taishun County,  29.vii–1.viii.2005, leg. Haili Yu, genitalia slide no. LGE18579f; 1 ♂, Wuyanling( 27.35°N, 119.92°E),  790 m, Taishun County,  2.viii.2007, leg. Qing Jing, genitalia slide no. LGE18309.   Diagnosis.Superficially, the species can be diagnosed by the creamy forewing with costa and dorsum broadly dark brown to fuscous. The general coloration is somewhat similar to that of  T. nigrimaculata, but  T. nullisignacannot be confused with the latter as the forewing apex is falcate. The male genitalia are characterized by the valva almost uniformly elongate from near base to the apex and the digitate anellus lobe with a long apical bristle. The female genitalia are unique in this species group in lacking a signum.   Description.Adult ( Fig. 18A). Wingspan 11.0– 15.5 mm. Head creamy white. Labial palpus creamy white to cream; in male, strongly suffused with fuscous on ventral and outer surfaces, segment I slightly longer than II, segment III nearly twice as long as II and stouter than that of female, hair pencil reaching basal 3/4 of III; in female, segment I short, II fuscous on outer surface and with scale tuft on dorsal surface, III nearly as long as II and fuscous in distal 1/2 or 2/3. Antenna with scape cream; flagellum dark fuscous except basal half of dorsal surface cream, male cilia slightly longer than diameter. Thorax cream, with two dark brown median streaks. Tegula cream except anterior and inner margins dark fuscous. Forewing ground color cream to brownish cream, usually sprinkled with dark brown scales, anterior edge of costa dark fuscous in basal 1/4; apical area dark brown to fuscous, with somewhat indistinct fuscous costal strigulae; apical spot small, slightly elongate, inner margin sometimes tinged with white, apex falcate; other markings dark brown to fuscous: a somewhat indistinct, longitudinal streak near costa, running from base and broadened at middle of wing, from distal 1/3 of wing narrowed and curved toward termen; beyond this a short and narrow streak from costa, usually indistinct, confluent with former streak posteriorly; beyond this a darker streak from distal 1/4 of costa, obliquely running toward apical spot, confluent with former longitudinal streak at half way across wing; a very broad band on dorsum from base, gradually narrowed along fold; a large darker spot at middle of wing on the former band, usually elliptical but sometimes extended toward apical spot as a longitudinal streak; beyond this a V-shaped marking, usually indistinct, between upper and lower forks strongly suffused with dark brown scales; termen with a short and darker streak, usually meets costal streak from distal 1/4 of wing at half way across wing, often bordered inwardly by white scales; fringe on apical area dark fuscous with a creamy median band, on termen metallic fuscous, on dorsum grey. Hindwing grey except subapex cream and apex dark fuscous; fringe grey except apical area strongly mixed with cream. Legs cream to brownish cream; fore coxa with lateral margins dark fuscous; fore femur, tibia and tarsus black on outer surface; mid femur strongly or slightly mixed with dark fuscous on outer surface, mid tibia with two fuscous oblique streaks on outer surface, one near apex usually indistinct; hind tibia with a dark fuscous longitudinal line from base to apex on outer surface; mid and hind tarsi alternating cream and dark fuscous.  Male sternum VIII( Fig. 26Q). Approximately 1/5 length of abdomen, gradually narrowed to round posterior apex, with lateral margins serrate in posterior 1/3.  Male genitalia( Fig. 41E). Uncus oblong, slightly broadening toward apex. Tegumen approximately 3 times as long as uncus. Valva nearly straight, narrow at base, ventral surface gradually broadening to 1/3, then almost uniformly elongate to round apex. Anellus lobe digitate, 1/5 length of valva, slightly constricted medially; inner margin sparsely setose in basal 2/3, subapex with one or two setae; apical bristle shorter than anellus lobe, hooked. Juxta with basal 1/2 broadly convex. Vinculum slightly convex on posterior margin. Saccus triangular, not exceeding tegumen pedunculus. Aedeagus short and stout, narrowed at middle and before apex, melanized in distal 1/2; apex truncate, with a short dorsal extension.  Female genitalia( Fig. 58D). Papillae anales weakly sclerotized. Apophyses anteriores 3/4 length of apophyses posteriores. Tergum shorter than sternum VIII; sternum VIII with posterior margin deeply dentate at middle, anterior margin strongly elongate. Ostium bursae large and round, opening on posterior margin of sternum VIII. Ductus bursae broad at base, slightly narrowed in posterior 1/2 or 1/3. Corpus bursae round, as long as ductus bursae, without signum.   Distribution. China( Chongqing, Guangxi, Hainan, Jiangxi, Taiwan, Zhejiang).   Etymology.The species name is derived from Latin nullus(lacking) and signum, referring to the absence of signum in the female genitalia. 2017-08-05 Xia Bai & Ping Liu & Shuai Yu 732 18.91 Mt. Wuzhi 764 109.7 119 120 1 1 Hainan Province holotype 2007-06-02 Zhiwei Zhang & Weichun Li China 940 18.67 Mt. Diaoluo 765 109.94 119 120 1 1 Hainan paratype 2007-06-10 Zhiwei Zhang & Weichun Li China 600 19.22 Bawangling 763 109.43 Nanchahe 119 120 1 1 Hainan Province paratype 2013-04-29 Yinghui Sun & Wei Guan & Tengteng Liu China Ledong County 1050 18.74 Jianfengling 765 108.84 Tianchi 119 120 1 1 Hainan Province paratype 2014-04-18 Tengteng Liu & Wei Guan & Xuemei Hu China Baisha County 430 19.08 Yuanmen 764 109.52 Hongxin Village 119 120 1 1 Hainan Province paratype 2014-05-02 Tengteng Liu & Wei Guan & Xuemei Hu China 640 19.17 Limushan Nature Reserves 763 109.74 119 120 10 9 1 Hainan Province paratype 2014-07-24 Peixin Cong & Linjie Liu & Sha Hu China 607 19.17 Limushan Forest 763 109.73 119 120 1 1 Hainan Province paratype 2016-01-14 Qingyun Wang & Suran Li & Shengnan Zhao China 787 18.73 Jianfengling 765 108.87 Tianchi 119 120 1 1 Hainan Province paratype 2017-08-04 Xia Bai & Ping Liu & Shuai Yu China 732 18.91 Mt. Wuzhi 764 109.7 119 120 1 1 Hainan Province paratype 2017-08-09 Xia Bai & Ping Liu & Shuai Yu China 954 18.74 Jianfengling 765 108.84 Mingfenggu 119 120 1 1 Hainan Province paratype 2014-08-27 Xiaofei Yang China Municipality 800 Mt. Jinfo Beipo 119 120 2 2 Chongqing paratype 2015-07-24 Meiqing Yang & Ga-Eun Lee China Huanjiang County 1180 25.29 Yangmeiao 748 109.31 Autonomous Region 119 120 1 1 Guangxi paratype 2006-07-20 Jiasheng Xu & Weichun Li China Mt. Jiulian 119 120 1 1 Jiangxi paratype [342,795,942,969] Taiwan 420 Mt. Fu Province 119 120 2 2 Jiangxi Province paratype [806,1432,943,969] 2006-07-31 Houhun Li & Xicui Du Taiwan Yilan 119 120 1 Yilan paratype 2005-07-29 2005-08-01 2005-07-29 Haili Yu Taiwan Taishun County 540 27.35 Wuyanling 742 119.92 119 120 2 1 1 Zhejiang Province paratype 2007-08-02 Qing Jing Taiwan Taishun County 790 27.35 Wuyanling 742 119.92 119 120 1 1 Zhejiang Province paratype