Tylostega serrata Du & Li, 2008

Liu, Ping & Wang, Shuxia, 2019, Two new species of the genus Tylostega Meyrick, 1894 (Lepidoptera: Crambidae) from China, with a list of all the known species in the world, Zoological Systematics 44 (3), pp. 206-211 : 209-210

Tylostega serrata Du & Li, 2008 ( Fig. 6 )

Tylostega serrata Du & Li, 2008 , Zootaxa, 1681: 60. TL: China (Henan). TD: NKU.

Diagnosis. This species is similar to T. tylostegalis (Hampson, 1900) externally, but can be separated in the male genitalia by the valva with one large elliptical projection medially, the dorsal margin of the sacculus not having denticles but inflated triangularly at middle, and the phallus with two cornuti; in the female genitalia by the presence of the lamella postvaginalis. In T. tylostegalis the valva has a small triangular projection medially, the dorsal margin of the sacculus bears denticles but not inflated triangularly at middle, and the phallus has three cornuti; and the lamella postvaginalis is absent (Du & Li, 2008: fig. 8).

Description. Adult wingspan 18.0‒24.0 mm.

Female genitalia ( Fig. 6 ). Apophyses anteriores about 2 times length of apophyses posteriores. Ostium bursae sclerotized peripherally. Lamella postvaginalis large, trapezoidal, with fine spines posteriorly and laterally; lamella antevaginalis being two triangular lobes, rounded posteriorly, sclerotized along edges. Ductus burse with a narrow longitudinal coiled stripe of small granules. Corpus bursae elongate, slightly broader than ductus bursae, slightly broadened anteriorly, not distinctly separated from ductus bursae.

Material examined. CHINA, Guangxi: 1♂, Hekou Protection Station, Mt. Dayao , Jinxiu County, 18 July 2015, leg. Mujie Qi & Shengnan Zhao, slide No. LP17983 ; 2♂, Mt. Daming , 5‒6 August 2011, leg. Shulian Hao & Yinghui Sun, slide Nos. LP18507 , LP18508 ; 1♂ 1♀, Mt. Daming , 20‒25 May 2011, leg. Linlin Yang & Yinghui Mou, slide Nos. LP18037 ♀, LP18038 ♂; Guizhou : 3♂, Heiwan River, Mt. Fanjing , 17‒18 July 2018, leg. Meiling Zheng, Jiaqi Deng & Xiaoju Zhu, slide No. LP17970 ; Yunnan: 1♂, Bingzhongluo Town, Gongshan County, Nujiang , 16 June 2017, leg. Kaijian Teng et al., slide No. LP17991 ; 1♂, Xiajinchang, Malipo County, Wenshan City , 29 July 2016, leg. Kaijian Teng, Jiaen Li & Tao Wang, slide No. LP18031 ; 1♀, Mojiang, Puer City , 20 October 2010, leg. Bingbing Hu, Jing Zhang & Yanpeng Cai, slide No. LP17985 ; 1♂, Taiyanghe Nature Reserves, Puer City , 14 August 2016, leg. Kaijian Teng, Jiaen Li & Tao Wang, slide No. LP18015 ; Zhejiang: 2♂, Laofoyan Village, Shuangxikou Town, Jiangshan City , 7 August 2016, leg. Qingyun Wang, Meiqing Yang & Ping Liu, slide No. LP17975 .

Distribution. China (Gansu, Guangxi, Guizhou, Henan, Yunnan, Zhejiang).

Remarks. The female of Tylostega serrata Du & Li, 2008 is reported for the first time here.

Figures

Figures 3–6. Tylostega spp., genitalia. 3. T. longicornuta sp. nov., male genitalia, holotype, slide No. LP18045. 4. Ditto, female genitalia, paratype, slide No. LP18044. 5. T. vittiformis sp. nov., male genitalia, slide No. LP18007. 6. T. serrata Du & Li, 2008, female genitalia, slide No. LP17985. Scale bars: 3, 5=0.5mm; 4, 6=1.0mm.