Periacma leyensis Wang &amp; Li 2006, sp. nov.
Creators: name: Wang, S. X.
name: Li, H. H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Oecophoridae
Periacma
Periacma leyensis

description: <i>Periacma leyensis</i> Wang &amp; Li, sp. nov. (Figures 29, 34 and 43) Holotype: <i>„</i>, China: Leye (24 <i>°</i> 47 <i>9</i> N, 106 <i>°</i> 34 <i>9</i> E), Guangxi Zhuangzu Autonomous Region, 1160 m, 26 July 2004, coll. Jiasheng Xu, genitalia slide No. W04091. Paratype: 1 &amp;female;, same data as holotype. Description: Wing expanse 11.0–12.0 mm. Head whitish yellow. Labial palpus mostly ocherous in male, whitish yellow in female; male second segment dorsally with dark brown scales, forming a somewhat longitudinal dark line in distal 3/5; female second segment with dark brown scales near end, forming a dark ring, third segment about 3/5 as long as second, long and thin, pointed apically. Antenna mostly brown. Thorax, tegula, and fore wing light yellow, with scattered brown scales throughout. Fore wing lanceolate (Figure 29); apex rounded; termen gently oblique; dark brown blotch extending from base of posterior margin obliquely upward to base of cell at middle, forming a somewhat arched band; brown spot at middle of cell and at 3/5 of fold; brown fascia from distal 1/3 of costa extending outward to before tornus; apex with large brown patch; cilia whitish yellow, gray around tornus. Hind wing and cilia gray. Legs light grayish white, tibiae and tarsi with brown speckles; spurs light ocherous yellow. Male genitalia (Figure 34): Uncus narrow in basal half, parallel-sided, laterally with strong setae near base; distal half roundly dilated. Gnathos with lateral arm somewhat triangular in shape, about 1/2 length of ventral plate; ventral plate with posterior half narrow, gradually widened from about middle to anterior margin, spinulate in anterior 1/3; anterior margin blunt. Valva narrow, slightly widened toward apex; apex rounded; dorsoproximal process long, narrow in basal 1/3, distal 2/3 wider. Sacculus about half as long as valva, irregularly triangular, dorsally with a sclerotized process at apex directing upward; ventral margin sinuate, with sclerotized edge. Saccus large, semicircular. Aedeagus narrow in basal 1/6, expanded from 1/6 to about 1/2; distal half strongly curved, with processes at about 5/6 and at apex. Female genitalia (Figure 43): Papilla analis somewhat triangular. Apophysis posterioris about twice as long as apophysis anterioris. Lamella postvaginalis large; posterior margin slightly concave at middle, sparsely lined with strong setae; anterior margin sclerotized, gently concave inward, laterally with sclerotized leaf-like process extending forward; lamella antevaginalis large, irregularly rectangular, weakly sclerotized. Ostium bursae with anterior margin sclerotized. Ductus bursae membranous, shorter than corpus bursae. Corpus bursae irregularly elliptical, membranous; signum quite small, with sclerotized spines, anteriorly with two large distinct thorns. Remarks: This species is closely related to <i>Periacma maekhongensis</i>, but can be distinguished by the lamella postvaginalis anteriorly possessing two sclerotized leaf-like processes extending downward from the anterior angles in the female genitalia. Etymology: The specific name is from the type locality, Leye, Guangxi Zhuangzu Autonomous Region.
description: Published as part of <i>Wang, S. X. &amp; Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43)</i> on pages 2387-2388, DOI: 10.1080/00222930601088123, http://zenodo.org/record/5231741