Thiotricha trichoma ( Caradja, 1920 )

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 : 94-95

publication ID	https://doi.org/ 10.11646/zootaxa.5449.1.1
publication LSID	lsid:zoobank.org:pub:CAC513A2-D2B4-4E6E-BAB6-CCE6E054680F
persistent identifier	https://treatment.plazi.org/id/03CC3667-9866-1D21-FF05-8978DFECE6FE
treatment provided by	Plazi
scientific name	Thiotricha trichoma ( Caradja, 1920 )
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Treatment

Thiotricha trichoma ( Caradja, 1920) View in CoL

( Figs 1A View FIGURE 1 , 13G View FIGURE 13 , 25T View FIGURE 25 , 38F View FIGURE 38 , 55A View FIGURE 55 , 65A–D View FIGURE 65 , 71B, C View FIGURE 71 )

Mystax trichoma Caradja, 1920: 136 View in CoL . TL: Kasakeswitsch, Russia. TD: MGAB.

Thiotricha trichoma View in CoL : Gaede, 1937: 307; Park, 1996: 66.

Polyhymno trichoma : Park & Ponomarenko, 2007: 44; Ponomarenko, 2008: 91.

Thiotricha synodonta Meyrick, 1936: 45 View in CoL ; Gaede, 1937: 559; Clarke, 1969: 472; Ivinskis et al., 1984: 41; Park, 2004: 101; Ueda & Fujiwara, 2005: 75. TL: Yumoto, Japan. TD: NHMUK. Syn. nov.

Polyhymno synodonta View in CoL : Park & Ponomarenko, 2007: 43; Sakamaki, 2013: 295.

Type material. Lectotype ( Figs 65A, B View FIGURE 65 , 71B View FIGURE 71 ) ♂ ( Mystax trichoma ), RUSSIA, Kasakeswitsch [= Kazakevichevo, Khabarovsky Krai, Russian Far East], “5511 Wsm. 1908” (originally from Walsingham’s collection), genitalia dissected by Margarita G. Ponomarenko, 30.06.1999 ( MGAB) ; Holotype ( Figs 65C, D View FIGURE 65 , 71C View FIGURE 71 ) ♀ ( Thiotricha synodonta ), JAPAN, Yumoto , viii.1934, leg. S. Issiki, genitalia slide no. J. F.G.C. 8333 ( NHMUK) .

Additional material examined. CHINA: Jilin Province: 1 ♂, Gaoshanhuayuan, Weidong 14 liaowangta, Mt. Changbai , 20.vii.2016, leg. Mujie Qi, Juan Li and Yanyan Jia , genitalia slide no. LGE16245; Liaoning Province: 1 ♀, Shilazi, Kuandian , 10–12.viii.2009, leg. Weichun Li and Jiayu Liu , genitalia slide no. LGE16274. JAPAN: 1 ♀, Shirane Spa. , 9.viii.1969, leg. S. Shimeki ( KNA) .

Diagnosis. Adult ( Figs 1A View FIGURE 1 , 13G View FIGURE 13 ). Wingspan 14.5−15.0 mm. The species can be diagnosed by the presence of a broad costal band and a subtriangular patch on dorsum near the wing base. The wing markings are very similar to those of T. obliquata ( Matsumura, 1931) described from Japan, but the patch in T. trichoma is shorter and not reaching the costal band whereas it is usually more extended toward the costa and reaching the costal band in the latter species. Also, the costal band is uninterruptedly running from base to near apex in T. trichoma whereas it is disconnected before middle of the wing in T. obliquata . The male sternum VIII ( Fig. 25T View FIGURE 25 ) of T. trichoma is unique as it is pentagonal in shape with the middle of lateral margins strongly produced. The male genitalia ( Fig. 38F View FIGURE 38 ) are diagnosed by the stout and simple valva almost uniformly elongate from near base to apex and the small anellus lobe bearing a hooked apical bristle. The female genitalia ( Fig. 55A View FIGURE 55 ) are characterized by the corpus bursae with anterior 1/3 constricted and the round signum situated near the entrance of ductus bursae.

Distribution. China (Henan, Hebei, Jilin, Liaoning), Korea, Japan, Russia (Khabarovsky Territory).

Host plants. Betulaceae : Alnus hirsute (Turcz. ex Spach) Rupr. , A. maximowiczii Callier ex C. K. Schneid. , Betula ermanii Cham. , B. pendula subsp. mandshurica (Regel) Ashburner & McAll. ( Sakamaki 2013) .

Remarks. The holotype of T. synodonta Meyrick was examined during the first author’s visit to NHMUK, and the photographs of the lectotype of T. trichoma were kindly provided by Dr. Mihai Stănescu from MGAB. We could also confirm the identification by examining the additional male and female of Japanese T. synodonta photographed and kindly provided by Dr. Khine Mon Mon Kyaw. The two specimens from Japan have slightly narrowed and longer dorsal patch of the forewing, but the genitalia are identical to those of the types and the Chinese specimens. Based on that, T. synodonta is synonymized with T. trichoma in this study.

A related species T. obliquata has been recorded from China ( Li 2002; Hua 2005), but the wing pattern illustrated in Li (2002) does not match with the original description and the male genitalia are different from those of a specimen from the type locality (Honshu of Japan) examined. The distribution of T. obliquata in China needs to be further studied.