Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species Author Wang, S. X. Author Li, H. H. text Journal of Natural History 2006 2006-12-28 40 41 - 43 2371 2393 http://dx.doi.org/10.1080/00222930601088123 journal article 10.1080/00222930601088123 1464-5262 5231741 Periacma angkhangensis Moriuti, Saito & Lewvanich, 1985 ( Figure 6 ) Periacma angkhangensis Moriuti, Saito & Lewvanich, 1985: 27 ; Wang and Li, 2002: 570. Wing expanse: 15.0 mm. Material examined: 1 „ , Mt. Weishan ( 25 ° 14 9 N , 100 ° 18 9 E ), Yunnan Province , 20 July 2001 , coll. Houhun Li and Xinpu Wang. Distribution: China ( Yunnan ), Thailand . Remarks: This species is characterized by the gnathos narrowly band-shaped, forming a somewhat circle, and the valva with costa and ventral margin nearly parallel-sided in the male genitalia.