Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China Author Zhang, Di College of Life Sciences, Nankai University, Tianjin 300071, China Author Li, Houhun College of Life Sciences, Nankai University, Tianjin 300071, China & College of Life and Geographic Sciences, Kashi University, Kashi 844000, China; Xinjiang Key Laboratory of Biological Resources and Ecology of Pamirs Plateau, Kashi 844000, China text Zootaxa 2023 2023-10-30 5360 4 583 592 https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135 journal article 10.11646/zootaxa.5360.4.7 1175-5326 10152774 E967718F-F071-49BC-B69D-D4D0E8979530 Key to the species of Ressia based on external characters and male genitalia 1. Forewing with a narrow fascia and three distal speckles....................................................... 2 - Forewing with a narrow fascia and four distal speckles........................................................ 6 2. Forewing markings with pale blue metallic luster ( Fig. 5 )...................................... R. forcipata sp. nov. - Forewing markings without metallic luster................................................................. 3 3. Subbasal fascia of forewing with anterior 1/4 much narrower and ill-defined ( Fig. 7 )............... R. semilunata sp. nov. - Subbasal fascia of forewing uniformly narrow.............................................................. 4 4. Pleural lobes of eighth segment with a furcella at base on dorsal margin ( Fig. 12 )...................... R. quercidentella - Pleural lobes of eighth segment without a furcella at base on dorsal margin....................................... 5 5. Pleural lobes of eighth segment narrowed to apex; cucullus auriculate ( Fig. 9 )............................ R. auriculata - Pleural lobes of eighth segment widened to apex; cucullus subelliptical ( Fig. 14 )...................... R . sinevi sp. nov. 6. Pleural lobes with one ventroapical process ( Fig. 10 )......................................... R. disparilis sp. nov. - Pleural lobes with two ventroapical processes ( Sinev 1988 , p. 115, fig. 13)............................... R. tonkinella