Caloptilia celtidis Kumata, 1982

Jiang, Yurong, Zhao, Yang, Wang, Encui, Zhang, Tongyou & Liu, Tengteng, 2021, Taxonomic review on Acrocercopinae, Gracillariinae and Ornixolinae from Shandong, China, with new data on distribution and host associations (Lepidoptera: Gracillariidae), Zoological Systematics 46 (3), pp. 240-257 : 243-245

Caloptilia celtidis Kumata, 1982 ( Figs 1C , 3C )

Caloptilia celtidis Kumata, 1982: 76 ; de Prins & de Prins, 2005: 87; Bai et al., 2009: 497. TL: Japan. TD: HUJ.

Diagnosis. This species is closely related to C. fidella ( Reutti, 1853) , a Palearctic species also feeding on plant species of Celtis , but differs from the latter by the phallus with about 6−8 cornuti. In C. fidella , the phallus has about five cornuti and another series of some ten cornuti on the ductus ejaculatorius.

Description. Adult. Wingspan 10.0 mm. Head brown, purple luster, face bright white. Maxillary palpus yellow, with a black spot on middle of outer side. Labial palpus yellow, with outer side of 2nd segment scattered with black scales, basal half of 3rd segment white and slightly yellowish brown, distal half black. Scape dark brown, flagellum yellowish brown, with black rings. Thorax and tegula dark brown and glossy. Fore and mid legs dark brown, tarsus white and end of each segment brown; mid femur and tibia thick with long scales; hind legs yellowish white, base of coxa and end of femur dark brown, end of tibia gray, outer side of each tarsal segment brown apically. Forewing dark brown with purple luster; a large triangular yellow spot occupying costal 1/4 to 4/5, extending to 3/4 width of wing, with 6–9 dark brown dots on costa; cilia on termen brown, with 3 dark brown lines, cilia on dorsum gray. Hindwing and cilia gray.

Male genitalia. Tuba analis with a linear sclerotization with unclear boundary. Tegumen slightly inflated beyond middle, both sides densely setose. Valva slightly reniform, with distal part slightly enlarged, covered with long setae, apical margin densely covered with short setae. Vinculum + saccus V-shaped, narrow and long. Phallus shorter than valva, about 6−8 cornuti at base which narrowed and split at end, with micro spines inside. Two pairs of coremata present, with anterior pair longer than posterior.

Material examined. Shandong: 1♂, Mt. Laoshan, Qingdao , 36.211°N, 120.593°E, 390 m, 2017.VI.29−VII.7, leaf mine and cocoon collected on Celtis sinensis , leg. Tengteng Liu, Zhenquan Gao & Nan Wang, genitalia slide no. LIU0037, field no. QD170701, registration no. SDNU. Ent 170235 .

Host plant. Celtis sinensis Pers , and Celtis jessoensis Koidz. ( Kumata, 1982) (Ulmaceae) .

Distribution. China (Anhui, Gansu, Guizhou, Hainan, Henan, Hong Kong, Hubei, Hunan, Jiangxi, Ningxia, Shandong, Shaanxi, Shanxi, Sichuan, Xizang, Zhejiang) (Bai et al., 2009), Japan ( Kumata, 1982).

Figures

Figure 1. Adult habitus. A. Calybites phasianipennella, male, registration no. SDNU.YT170707. B. Calybites securinella, male, registration no. SDNU.Ent150632. C. Caloptilia (Caloptilia) celtidis, male, registration no. SDNU.Ent170235. D. Caloptilia (C.) chrysolampra, male, registration no. SDNU.BZ160807. E. Caloptilia (C.) sapporella, male, SDNU.Ent170088. F. Acrocercops transecta, male, registration no. SDNU.LS150701. Scale bars=2.0mm.

Figure 3. Male genitalia.A. Calybites phasianipennella, slide no. LIU0031. B. Calybites securinella, slide no. LIU0036. C. Caloptilia (Caloptilia) celtidis, slide no. LIU0037. D. Caloptilia (C.) chrysolampra, slide no. LIU0035. E. Caloptilia (C.) sapporella, slide no. LIU0038. F. Acrocercops transecta, slide no. LIU15001. Scale bars=0.2 mm.