Meleonoma arcivalvata Wang, 2021

Wang, Shuxia, Zhu, Xiaoju & Tao, Zhulin, 2021, Study of the genus Meleonoma Meyrick, 1914 (Lepidoptera: Autostichidae) from China (III), with descriptions of eighteen new species, Zootaxa 4995 (2), pp. 303-333 : 316

publication ID	https://doi.org/ 10.11646/zootaxa.4995.2.5
publication LSID	lsid:zoobank.org:pub:5F060FBC-3CD8-4329-8B2A-F26FEFB16A5D
DOI	https://doi.org/10.5281/zenodo.5057149
persistent identifier	https://treatment.plazi.org/id/1D0E87CF-5600-FFCB-FF3F-FF0729B570D0
treatment provided by	Plazi
scientific name	Meleonoma arcivalvata Wang
status	sp. nov.

Treatment

Meleonoma arcivalvata Wang , sp. nov.

( Figs 9 View FIGURES 9‒14 , 27 View FIGURES 27‒32 , 44 View FIGURES 44‒49 )

Type material. CHINA, Zhejiang: Holotype • ♂, Lao’an (30.33°N, 119.40°E), Mt. Tianmu , 555 m, 3.VII.2014, leg. A.H. Yin et al., slide No. YAH15247. GoogleMaps

Paratypes (12♂ 1♀): • 2♂, Qianjiangyuan, Mt. Tianmu , 866 m, 8–10.VII.2014, leg. A.H. Yin et al .; • 2♂, Qianmutian, Mt. Tianmu , 1320 m, 1.VII.2013, leg. A.H. Yin & X.C. Wang ; • 3♂, Qingliangfeng, Mt. Longtang , 390–500 m, 21–22. V.2014, leg. L.L. Yang & Z.G. Zhang ; • 1♂, Huangshayao Town, Mt. Jiulong , Suichang County, Lishui City , 360 m, 24. V.2017, leg. S.N. Qian & G.E. Lee, slide No. ZXJ19570; Guizhou : • 1♂, Sanchahe Town, Xishui , 767 m, 1.VII.2019, leg. M. R. Xing et al.; Taiwan : • 3♂ 1♀, Hueisun Experimental Forest Farm, Nantou, 1100 m, 22–24.IV.1999, leg. Mey & Ebert, slide No. MNHU-NK 124♀ ( MNHU) .

Diagnosis. The new species is similar to M. chongqingensis sp. nov. in the male genitalia. It can be distinguished by the forewing having a large inverted triangular costal spot, and in the male genitalia by the sub-triangular transtilla narrowed toward middle and the absence of a cornutus; in M. chongqingensis , the costal spot is dot-like, the transtilla is widely and almost uniformly banded, and the cornuti consist of a cluster of spines.

Description. Adult ( Fig. 9 View FIGURES 9‒14 ). Forewing length 5.5‒6.3 mm.

Head with vertex and occiput yellow, frons yellowish white. Labial palpus yellow; second segment mixed with blackish-brown scales, with a blackish-brown apical ring; third segment approximately 2/3 length of second segment, blackish-brown near apex on dorsal surface as well on inner and outer surfaces. Antenna yellow; scape mixed with blackish-brown scales; flagellum annulated with blackish brown except basal several flagellomeres yellow.

Thorax yellow, tegula blackish brown. Forewing with costal margin arched, apex rounded; blackish brown; median fascia orange yellow, with sparse blackish-brown scales, extending from middle of costal margin oblique outward to before tornus, widened posteriorly; distal spot orange yellow, large, inverted triangular, from distal 1/4 to about 1/2 width of forewing; plical spot black, at distal 1/3, placed at inner margin of median fascia; discal and discocellular spots black, placed at basal 3/5 and at outer margin of cell respectively; fringe concolorous with wing. Hindwing and fringe greyish brown. Legs yellow; on ventral surface, coxa of foreleg with sparse blackish-brown scales, femora of fore- and midlegs with scattered blackish-brown scales, tibiae blackish brown excpet yellow at middle and at apex, tarsus of foreleg blackish brown except yellow at base of basal tarsomere and at apices of basal two tarsomeres, tarsus of midleg blackish brown except yellow at base of basal tarsomere and at apices of basal two and apical one tarsomeres, femur of hindleg yellowish white, with sparse blackish-brown scales, tibia blackish brown except yellowish white at middle and at apex, tarsus blackish brown except yellowish white at apices of basal three tarsomeres and at base of basal tarsomere.

Male genitalia ( Fig. 27 View FIGURES 27‒32 ). Uncus triangular, with sparse setae, weakly sclerotized. Tegumen widened medially, median height longer than uncus, concave semicircularly on anterior margin; lateral arm short and uniformly wide, rounded at apex.Valva slightly narrower and subparallel basally, evenly wide and bent inward distally, obtuse apically, produced to a papillary process dorsoapically, sometimes papillary process absent ( Fig. 27a View FIGURES 27‒32 ); ventral margin arched and densely setose distally; costa concave medially; transtilla sub-triangular, narrowed toward middle, narrowly rounded at apex. Sacculus wide at base, abruptly narrowed to middle, distal half heavily sclerotized, slender, apex with a denticle directed dorsad. Saccus short, inverted triangular, rounded at apex, almost as long as uncus. Juxta curved in U shape. Aedeagus about same length as valva, slender and curved, distally with a belt curved in S shape and with a small sclerite dentate apically; cornutus absent.

Female genitalia ( Fig. 44 View FIGURES 44‒49 ). Papillae anales sub-rectangular, with dense short setae. Apophyses posteriores 2.5 times length of apophyses anteriores. Eighth sternal plate spiculate, posterior margin concave at middle, forming two apex-obtused lobes, lined with long setae. Lamella antevaginalis triangularly extended outward laterally. Ductus bursae entirely sclerotized, narrowed anteriorly, triangularly produced posterolaterally; ductus seminalis arising from junction of ductus bursae and corpus bursae. Corpus bursae approximately 2/3 length of ductus bursae, rounded; without signum.

Distribution. China (Guizhou, Taiwan, Zhejiang).

Etymology. The specific epithet is derived from the Latin arci - and valvatus, referring to the shape of the valva.