Macrobathra baculiformis Li, 2023

Zhang, Di & Li, Houhun, 2023, Review of the genus Macrobathra Meyrick, 1883 (Lepidoptera: Cosmopterigidae) in China, Zootaxa 5330 (2), pp. 227-246 : 239-240

Macrobathra baculiformis Li , sp. nov.

( Figs 10 , 27 )

Type material. CHINA, Hainan: Holotype ♁, Datian, Dongfang City , 25 m, 2.XII.2009, leg. ZH Du & LL Yang, slide No. ZD 21341.

Paratypes: 2♁, Datian, Dongfang City, 100 m, 27.IV.2009, leg. Q Jin & BB Hu.

Diagnosis. The new species is different from its congeners by the scape of the antenna with pecten; in the male genitalia by the tegumen extended outward in triangle anterolaterally, and the large symmetrical anellus lobes thumb-shaped.

Description. Adult ( Fig. 10 ). Wingspan 10.5–11.0 mm.

Head with vertex dark brown, frons pale yellow. Antenna dark brown; scape pale yellow, with black scales on ventral surface, with two longitudinal pale yellow lines on dorsal surface, pecten present; flagellum with a pale yellow line running from base to apex on dorsal surface. Labial palpus: second palpomere pale yellow; third palpomere dark brown, except basal half pale yellow dorsally, with a pale yellow longitudinal streak on ventral surface.

Thorax and tegula dark brown. Forewing dark brown; broad fascia pale yellow, from between costal 1/5 and 2/5 to dorsum, inner margin straight, outer margin excurved medially; costal margin with a large pale yellow spot running from 5/6 to lower angle of discal cell; fringe dark brown. Hindwing and fringe deep brown. Fore- and midlegs dark brown except femur and tibia of midleg brown dorsally, tibia white at 1/3 and 2/3 on outer surface, first tarsomere ringed with white at base and apex, fifth tarsomere white; hindleg with femur and tibia light brown on inner surface, dark brown on outer surface, except femur white at apex and tibia white at middle and apex, tarsus dark brown, first tarsomere ringed with white at base and apex.

Male genitalia ( Fig. 27 ). Socius symmetrical, shorter than valva, gradually narrowed towards hooked apex; semicircular process between base of two brachia of socius. Tegumen wide, trapezoidal, extended and narrowed outward in triangle anterolaterally. Valva rodlike, uniform, with dense setae, rounded at apex. Saccus shorter than valva, narrowed towards narrowly rounded apex. Anellus lobes strong, thumb-shaped, shorter and wider than valva, with dense setae distally. Aedeagus stout, tapered towards apex; vesica with wrinkles.

Female unknown.

Distribution. China (Hainan).

Etymology. The specific epithet of the new species is derived from the Latin baculiformis , referring to the shape of the valva in the male genitalia.

Remarks. The features of this new species are consistent with members of the genus Macrobathra , such as the labial palpus ascending beyond vertex, the third segment longer than the second segment, the forewing with a wide transversal fascia, the symmetrical socius, and the paired signa. However, this species has pecten on the scape of the antenna, which are absent in other known Macrobathra species. We tentatively place the new species in Macrobathra before more available characters are found and more similar species are identified.

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.