Study of the genus Meleonoma Meyrick, 1914 (Lepidoptera: Autostichidae) from China, with descriptions of twenty-one new species (II) Author Wang, Shuxia College of Life Sciences, Nankai University, Tianjin 300071, China Author Zhu, Xiaoju College of Life Sciences, Nankai University, Tianjin 300071, China & zxjyouxiang @ 126. com; https: // orcid. org / 0000 - 0002 - 4590 - 8480 text Zootaxa 2020 2020-11-19 4881 2 257 289 journal article 9530 10.11646/zootaxa.4881.2.3 33c0b2ac-f010-4b11-a819-0796497a6928 1175-5326 4283658 2F76CB59-C81F-4DE8-B05D-65FBAC889F73 Meleonoma microdonta sp. nov. ( Figs 15 , 37 ) urn:lsid:zoobank.org:act: AA1A7FCD-460F-42E7-B629-3C74FA8008FE Type material. CHINA , Zhejiang : Holotype ♂, Qingliangfeng ( 30.11°N , 118.91°E ), Lin’an County , 900 m , 10.VIII.2005 , leg. YL Xiao , slide No. YAH15496 ( NKU ) . Paratype : 1♂, 12.VIII.2005 , other same data as holotype ( NKU ) . Diagnosis. The new species is diagnosic by the valva with small denticles ventroapically. It is similar to M. basiprocessa sp. nov. superficially and to M. forcipata sp. nov. in the male genitalia, and the differences between them are stated in the diagnosis of M. basiprocessa and M. forcipata respectively. Description. Adult ( Fig. 15 ). Forewing length 5.0 mm. Head with frons blackish grey, mixed with yellow; vertex yellow. Labial palpus yellow; second segment with dense blackish-grey scales on outer sufrace, with a blackish-grey ring apically; third segment 2/3 as long as second segment, with blackish-grey scales. Scape of antenna yellow, mixed with blackish-grey scales; flagellum blackish grey, annulated with yellow on ventral surface. Thorax blackish grey in middle, yellow laterally; tegula blackish grey basally, yellow distally. Forewing narrow lanceolate, pointed at apex; ground colour yellow, with blackish-grey scales; costal margin with dense blackish-grey scales in basal 1/3, forming a blackish-grey stripe; costal spot greyish black, extending obliquely outward from middle to anterior angle of cell; apical patch blackish grey, ill-defined; fold with a blackish-grey spot at distal 2/5; cell with blackish-grey spot near base, at about distal 1/4 on posterior margin and before posterior angle, outmost one fused with costal spot anteriorly; dorsum with dense blackish-grey scales in basal 3/5, with a triangular blackishgrey spot at end of fold; fringe yellow, blackish grey around tornus. Hindwing and fringe deep grey. Legs yellow; on ventral surface, fore- and midlegs greyish black except tibia yellow apically and tarsus yellow at base of basal tarsomere and at apices of basal two tarsomeres, mid femur with greyish-black scales, mid tarsus with basal three tarsomeres greyish black except yellow at apices, hind femur greyish black, hind tibia with greyish-black scales. Male genitalia ( Fig. 37 ). Uncus long and slender, spine-shaped, narrowed from base to pointed apex. Gnathos with lateral arm heavily sclerotized, narrowed outward and right-angled at posterolateral corner, then narrowly and straightly extending downward, free and weakly sclerotized distally, membranous anteromedially. Tegumen narrowed medially, concave in V-shape medially on anterior margin, with wide sclerotized band along outer margin, with narrow edge along inner margin; lateral arm narrowed anteriorly. Valva parallel-sided basally, widened to apex distally, apex obtusely oblique inward, triangularly produced dorsodistally; ventral margin heavily sclerotized, with a small triangular process at base, projected apically and forming a sub-triangular process bearing a large and a small denticles; costa straight, extending to pre-apex of valva; transtilla slender, straight inward, joined medially. Sacculus sub-quadrate, not separated from valva, heavily sclerotized, with dense setae distally, produced ventroapically but not forming a process; apex straight, with tiny denticles along anterior half. Saccus narrowed from wide base to narrowly rounded apex, slightly longer than uncus. Juxta V-shaped. Aedeagus nearly 1.7 times as long as valva, basal 2/3 tubular, extremely narrowed to before apex; apex enlarged by having a curved belt extending backward to distal 1/5; cornutus spine-shaped, placed at distal 1/4. Female unknown. Distribution. China ( Zhejiang ). Etymology. The specific epithet is derived from the Latin microdontus , referring to the two ventroapical denticles of the valva.