Macrobathra solidilatata Li, 2023

Zhang, Di & Li, Houhun, 2023, Review of the genus Macrobathra Meyrick, 1883 (Lepidoptera: Cosmopterigidae) in China, Zootaxa 5330 (2), pp. 227-246 : 238

Macrobathra solidilatata Li , sp. nov.

( Figs 8 , 25 )

Type material. CHINA, Hainan: Holotype ♁, Bawangling , Changjiang County (19.10°N, 109.11°E), 225 m, 14.VIII.2017, leg. X Bai et al., slide No. ZD 21189.

Paratypes: 2♁, same data as holotype; 1♁, Bawangling, Changjiang County (19.10°N, 109.11°E), 225 m, 11.VI.2018, leg. X Bai et al., slide No. ZD 21237; 1♁, Mt. Diaoluo , 100 m, 18.IV.2008, leg. BB Hu & HY Bai, slide No. ZD 21343; 1♁, Redaishumuyuan, Jianfeng Town , Ledong County (18.70°N, 108.79°E), 40 m, 25.IV.2014, leg. TT Liu et al., slide No. ZD 21344; Guangxi: 1♁, Mulunbaohuqu, 280 m, 12.VIII.2011, leg. SL Hao & YH Sun, slide No. ZD 21345; Guizhou: 1♁, Banzhai Village , Maolan County (25.23°N, 108.03°E), 530 m, 14.VIII.2018, leg. ML Zheng et al., slide No. ZD 21239 .

Diagnosis. The new species is similar to M. afflata sp. nov. in having asymmetrical socii in the male genitalia. It can be distinguished by the tegula with a white spot, and in the male genitalia by the symmetrical valva uniformly wide. In M. afflata , the tegula lacks a white spot; the distal half of the left valva is dilated elliptically, and the right valva is slightly widened before apex.

Description. Adult ( Fig. 8 ). Wingspan 7.5–8.0 mm.

Head with frons and vertex dark brown, frons with white longitudinal line laterally. Antenna dark brown; scape with longitudinal white line ventrally and dorsally; flagellum annulated with white dorsally. Labial palpus: basal half of second palpomere white, with black scales, distal half dark brown, ringed with white at apex; third palpomere dark brown except white at apex, with a white line running from base to apex on ventral side.

Thorax and tegula dark brown, tegula with a milky white spot on outer margin. Forewing dark brown; subbasal fascia oyster white, sub-triangular, broadened from costal 1/6 to fold, then uniformly wide from fold to between 1/7 and 1/3 of dorsum; white spot at basal 1/2 and 5/6 of costal margin as well as at tornus, tornal spot largest; fringe dark brown. Hindwing and fringe taupe brown. Foreleg white dorsally, dark brown ventrally except coxa with white scales, tarsus white at apex; midleg with femur yellowish white, tibia and tarsus white mixed with black dorsally, dark brown ventrally, except tibia and first tarsomere ringed with white at base and apex, fifth tarsomere white; hindleg yellowish white on inner surface, tarsus mixed with deep brown scales, dark brown on outer surface, except femur yellowish white, ringed with white at 1/6 and apex of tibia as well as at apex of each tarsomere.

Male genitalia ( Fig. 25 ). Socius with brachia bent inward, asymmetrical: left brachium longer and wider than right brachium, as long as 2/3 of valva, dilated before apex distally; right brachium slender, rounded at apex. Tegumen sub-trapezoidal. Valva uniformly wide, obtuse at apex, with a few setae ventrally. Saccus 2 times length of valva, subparallel. Anellus semicircular dorsally, narrowly band-shaped ventrally. Aedeagus stout; vesica with wrinkles.

Female unknown.

Distribution. China (Guangxi, Guizhou, Hainan).

Etymology. The specific epithet of the new species is derived from the Latin solus and dilatatus, referring to the left brachium of the socius dilated distally before the apex in male genitalia.

Figures

FIGURES 6‒11. Adults of Macrobathra spp. 6. M. nomaea; 7. M. petalitis; 8. M. solidilatata sp. nov., holotype; 9. M. trigonilamella sp. nov., holotype; 10. M. baculiformis sp. nov., paratype; 11. M. bipunciata sp. nov., holotype. All males. Scales = 2.0 mm.

FIGURES 24‒29. Male genitalia of Macrobathra spp. 24. M. petalitis, slide No. ZD21351; 25. M. solidilatata sp. nov., holotype, slide No. ZD21189; 26. M. trigonilamella sp. nov., holotype, slide No. ZD21347; 27. M. baculiformis sp. nov., holotype, slide No. ZD21341; 28. M. bipunciata sp. nov., holotype, slide No. ZD21315; 29. M. flavidus, slide No. ZD21295. Scales = 0.2 mm.