Meleonoma taiwanensis, Wang & Zhu, 2020

Meleonoma taiwanensis sp. nov.

( Figs 24 View FIGURES 21–24 , 46 View FIGURES 43–46 , 56 View FIGURES 52–56 )

urn:lsid:zoobank.org:act:

Type material. CHINA, Taiwan: Holotype ♂, Huisun Forest Park ( 23.96°N, 120.97°E), Nantou County, 1100 m, 22–24.IV.1999, leg. Mey & Ebert, slide No. MNHU-NK110 ( MNHU) GoogleMaps . Paratypes: 2♂ 3♀, same data as holotype, slide No. MNHU-NK GoogleMaps 111♀ ( MNHU) .

Diagnosis. The new species is similar to M. bifoliolata (Wang, 2006) in the forewing pattern. It can be distinguished in the male genitalia by the sacculus produced to a sub-triangular process dorsally, and the aedeagus with two stout spines at apex; and the lamella antevaginalis produced to a digitate process posterolaterally and longer than the antrum in the female genitalia. In M. bifoliolata , the sacculus has a sub-rounded process, and the aedeagus lacks spines at apex; and the lamella antevaginalis is produced to a digitate process posterolaterally and shorter than the antrum ( Wang 2006a: 16, figs 8, 24). It is also similar to M. annulignatha sp. nov., and the differences between them are stated in the diagnosis of the preceding species.

Description. Adult ( Fig. 24 View FIGURES 21–24 ). Forewing length 8.5‾9.0 mm.

Head yellow, frons yellowish white. Labial palpus yellow; second segment with blackish-brown scales on distal 3/4; third segment slightly longer than half length of second segment, with a blackish-brown ring at distal 1/3. Antenna yellow; scape greyish brown basally; flagellum ringed with greyish black.

Thorax and tegula greyish black. Forewing greyish black, with yellow spots beyond middle and at pre-apex of costal margin as well as at dorsum before tornus respectively. Legs yellow, tibiae and tarsi marked with blackish brown on outer surface; femur and coxa of foreleg blackish brown on ventral surface; femora of mid- and hindlegs tinged with blackish-brown scales on ventral surface.

Male genitalia ( Fig. 46 View FIGURES 43–46 ). Uncus wide at base, narrowed to basal 3/5, then parallel to before bifurcated apex, setose laterally. Gnathos nearly as long as uncus, weakly sclerotized; ventral plate widely banded; lateral arm wide basally, narrowed before middle, then evenly wide to ventral plate. Tegumen uniformly wide medially; lateral arm evenly narrow, narrower anteriorly. Valva isosceles triangular, parallel from base to before middle, narrowed from beyond middle to narrowly rounded apex, with dense setae; ventral margin triangularly produced medially; costa banded, straight, produced beyond apex, with a weakly sclerotized, widely banded process from about basal 1/3 extending inward. Sacculus sub-rectangular; apex concave medially, with sparse long setae, dorsoapically produced to an elongate sub-triangular process, ventroapically produced to a broad triangular process, shorter than dorsal process; ventral margin heavily sclerotized. Saccus wide at base, sub-parallel distally to pre-apex, rounded at apex. Aedeagus longer than valva, straightly stalagmitic, with two slender spines beyond middle laterally, several teeth at distal 1/3, two stout spines at apex.

Female genitalia ( Fig. 56 View FIGURES 52–56 ). Papillae anales sub-rectangular, with dense short setae on dorsal surface. Apophyses posteriores approximately 3.0 times as long as apophyses anteriores. Eighth sternal plate deeply concave in narrow V-shape medially on posterior margin, with sparse long setae. Lamella antevaginalis narrowly banded anteriorly, produced to a digitate process posterolaterally, longer than antrum. Antrum short, heavily sclerotized, shorter than wide. Ductus bursae inflated and membranous anteriorly, with a large curved sclerite; ductus seminalis extending anteriorly of ductus bursae. Corpus bursae ovate, granulate.

Distribution. China ( Taiwan).

Etymology. The specific epithet is from the type locality, Taiwan, China.