Macrobathra trigonilamella Zhang & Li 2023, sp. nov.
Creators: name: Zhang, Di
name: Li, Houhun
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Cosmopterigidae
Macrobathra
Macrobathra trigonilamella

description: Macrobathra trigonilamella Li, sp. nov.
(Figs 9, 26, 39)
Type material. CHINA, Yunnan: Holotype ♁, Taiyanghe, Pu’er City, 8–16.VI.2015, leg. ZG Zhang, slide No. ZD 21347.
Paratypes: 2♁ 1♀, Taiyanghe, Pu’er City, 8‒9.VI.2015, leg. ZG Zhang, slide No. ZD 21219 ♀; 1♁, Laiyanghe, Simao City, 1500 m, 16–20.V.2000, leg. WJ Bu & LY Zheng, slide No. ZZW07293; 27 ♁ 8♀, Taiyanghe, 1450 m, 11.V‒11.VI.2014, leg. ZG Zhang, slide Nos. ZD 21198♁, ZD21214♁, ZD21221♁, ZD21348♁, ZD21220 ♀.
Diagnosis. The new species is similar to M. arneutis Meyrick, 1914 in having a symmetrical socius and the valvae equal in length. It can be distinguished by the forewing with a band-shaped subbasal fascia, and the tegula with a white spot; in the male genitalia by the right valva having a small triangular plate. In M. arneutis, the subbasal fascia of the forewing is broad trapezoidal, and the tegula lacks a spot; the valva lacks a plate in the male genitalia.
Description. Adult (Fig. 9). Wingspan 11.5–13.0 mm.
Head with frons deep yellow, vertex dark brown. Antenna dark brown except scape pale yellow on ventral surface and at terminal margin; flagellum annulated with yellow on dorsal surface. Labial palpus: second palpomere yellow, with dark brown scales at apex on ventral side; third palpomere dark brown, with a longitudinal yellow line on ventral side.
Thorax dark brown except white at base; tegula dark brown, with a milky white spot. Forewing black; subbasal fascia cream, from basal 1/6 of costal margin to dorsum, inner margin straight, outer margin arched outward medially; equally sized cream spot at 1/2 and 4/5 of costal margin and at tornus respectively; fringe same colour as forewing. Hindwing and fringe deep gray. Foreleg dark brown ventrally, pale yellow dorsally except tarsus dark brown, first tarsomere ringed with pale yellow at base and apex; midleg dark brown except femur pale yellow dorsally, femur, tibia and first tarsomere ringed with pale yellow at apex; hindleg dark brown on outer surface, tibia pale yellow at basal 1/6 and 1/2, tibia and first tarsomere ringed with pale yellow at apex, inner surface pale yellow except first tarsomere dark brown.
Male genitalia (Fig. 26). Socius symmetrical, approximately as long as right valva, dilated distally, with a small notch at apex. Valva equal in length, with numerous setae ventrodistally, obliquely truncate at apex; left valva with distal 1/3 slightly broadened; right valva almost uniform, with a small triangular plate extending from between dorsal 2/3 at middle width and right posterolateral corner. Saccus about 2 times length of left valva, apex rounded. Anellus obtusely broad at apex on dorsal surface, band-shaped basally and sub-rectangular distally on ventral surface. Aedeagus cylindrical; vesica wrinkled, spiral distally.
Female genitalia (Fig. 39). Apophyses posteriores twice as long as apophyses anteriores. Seventh sternite with a wide sclerotized band posteriorly, shallowly concave at middle on posterior margin, spinulous. Sterigma hornshaped. Ductus bursae slightly longer than posterior apophyses, posterior half tubular and sclerotized, anterior half membranous, with numerous granules; accessory bursae arising from middle of ductus bursae, spermatheca ovate. Corpus bursae elliptical, densely granulous, shorter than ductus bursae; paired signa small, each being a sub-circular plate with a tooth.
Distribution. China (Yunnan).
Etymology. The specific epithet of the new species is derived from the Latin trigonius and Lamella, referring to the right valva having a triangular plate in the male genitalia.
description: Published as part of Zhang, Di & Li, Houhun, 2023, Review of the genus Macrobathra Meyrick, 1883 (Lepidoptera: Cosmopterigidae) in China, pp. 227-246 in Zootaxa 5330 (2) on pages 238-239, DOI: 10.11646/zootaxa.5330.2.3, http://zenodo.org/record/8249282