Bucculatrix yingjingensis Liao, Yagi & Huang, 2019

Liao, Cheng-Qing, Yagi, Sadahisa, Kobayashi, Shigeki & Huang, Guo-Hua, 2019, Two new species of Bucculatrix Zeller (Lepidoptera: Bucculatricidae) from China, Zootaxa 4624 (3), pp. 322-336 : 324

Bucculatrix yingjingensis Liao, Yagi & Huang , sp. nov.

Figs. 1–3, 5 , 7–10

Diagnosis. Bucculatrix yingjingensis is very similar to B. liubaensis in forewing color and pattern, but it can be distinguished by the following characters: head, vertex, and tuft yellow, and abdomen brown (head and vertex cream white, tuft reddish brown, and abdomen black in B. liubaensis ), forewing spots distinctly larger than in B. liubaensis , and one additional small white spot at the forewing apex in the female (absent in B. liubaensis ). The male genitalia are similar to those of B. noltei Petry, 1912 , a European Artemisia -feeding species, but in B. noltei the apical part of the valva is narrower and the basal part is much wider ( Bengtsson & Johansson 2011: 63).

Description. Male ( Figs. 1–3, 5 ). Wing expanse 8.8 mm. Head. Face smooth, densely covered with appressed yellow scales. Vertex with slender, hair-like, yellow scales, projected in all directions medially, and some broad brown scales laterally. Antennae filiform, about 3/4 of forewing length; scape stout, forming eye-cap, covered with broad yellow scales dorsally and some slender, hair-like scales ventrally; pedicel short, yellowish; flagellum brownish mixed with some black scales, first flagellomere distinctly with dorsal notch ( Fig. 3 ). Proboscis without scales, short, smooth. Labial palpus very short.

Thorax. Thoracic tergites covered with brown scales anteriorly and with pale brown scales posteriorly. Foreleg covered with brown scales; midleg brown mixed with black scales on outer surface of tarsi; hindleg black with slen- der yellow to brown scales on tibiae. Forewing length about 4.2 mm, lanceolate, ground color consisting of yellow and creamy white mixed basally and brown to dark brown apically, separated by an indistinct creamy white line near basal 1/3, 2/3 of apex with two small creamy white spots at anterior and posterior margins, upper one more or less ill defined; fringes and ventral surface dark grey to brown. Venation with Sc broadened basally, ending basal to 1/3 of wing margin; R with five branches, R 5 stalked with M 1; M 2, CuA and CuP poorly differentiated, CuP as a fold; 1A+2A well developed, reaching near midpoint of posterior margin ( Fig. 5 ). Hindwing with dorsal and ventral surfaces and fringes dark grey to brown, with a single long frenular bristle ( Figs. 1, 5 ). Venation with Sc broadened basally, extending to nearly 4/5 of hindwing; Rs not reaching wing apex; M 1 and M 2 weakly developed and well separated; CuA well developed, ending near midpoint of wing margin; A as a fold ( Fig. 5 ).

Abdomen. Dorsally black and ventrally dark brown except abdominal apex with two clusters of elongated, yellow scales. Male genitalia ( Figs. 7–10 ) with uncus and gnathos absent; tegumen broad, extended; socii as short lobes, rolled down inside, with slender setae from basal 1/4 to apical 1/8, and apex covered with stout setae; tuba analis moderately sclerotized, longer than tegumen but not exceeding socii, connected with tegumen and vinculum basally; subscaphium weakly sclerotized, densely covered with very minute setae; valva broad, apex gradually narrowed and blunt circle, densely covered with slender setae on distal half of outer surface and stout setae along dorsal margin of apex; transtilla a pair of straight process, base somewhat wider than apex; vinculum moderately sclerotized, ventral surface broad, lateral sides gradually narrow; phallus elongate, basal half gradually broad to the base, apical half almost equal width, apex distinctly curved and hook-shaped; cornuti absent ( Fig. 9 ); juxta weekly sclerotized, curved, almost as long as valva, broader basally, apex bilobate at connecting position.

Female. Head and Thorax: Essentially as described for male, but white spots of forewing larger, and a distinct transverse white line present at basal 1/3 ( Fig. 2 ). Abdomen: Lost.

Holotype: ♂, China: Longcanggou National Forest Park, Ya’an City , Sichuan Province, N29.631, E102.886, 17.VII.2017, light trapping, G.H. Huang, M. Wang, T. Hirowatari & S. Yagi leg. (specimen no. HAUHL 024226 , deposited in HUNAU).

Paratype: ♀, same data as holotype (specimen no. HAUHL 0225424 , DNA no. LCQ070 deposited in HU- NAU) .

Host plant. Unknown.

Distribution. China (Sichuan).

Etymology. The specific epithet refers to the type locality - Longcanggou National Forest Park in Yingjing County.

Figures

FIGURES 1–6. Bucculatrix species. 1–3, 5. B. yingjingensis Liao, Yagi & Huang sp. nov. 4, 6. B. liubaensis Liao, Kobayashi & Huang sp. nov. 1. Male adult, holotype. 2. Female adult, paratype. 3. Head of male adult ventrally, holotype (red arrow indicate the notch of antennae). 4. Female adult, holotype. 5. Wing venation, paratype. 6. Wing venation, holotype.

FIGURES 7–10. Bucculatrix yingjingensis Liao, Yagi & Huang sp. nov. 7. Male genitalia with phallus, holotype, dorsal view. 8. Ditto, ventral view. 9. Male genitalia with phallus separated. 10. Abdominal scale sac of male adult, holotype. Abbreviations: ju: juxta; ph: phallus; so: socii; ta: tuba analis; te: tegumen; tr: transtilla; va: valva; vi: vinculum.