taxonID	type	description	language	source
03B1879AFF9AFFF6FF78DAE2FDA920A4.taxon	materials_examined	Type species: Ressia quercidentella Sinev, 1988.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9AFFF6FF78DAE2FDA920A4.taxon	diagnosis	Diagnosis. Ressia is diagnosed by the scape of the antennae with pectens basally, the sickle-shaped labial palpi with the third palpomere longer than the second palpomere (Figs 1 a – b); the forewings with a white or silvery white subbasal fascia and 3 – 4 distal speckles; the male eighth tergum with a heavily sclerotized furcate process, and the pleural lobes of the male eighth segment symmetrical or asymmetrical. In the male genitalia, Ressia can be distinguished by the socii with the right brachium much longer than the left one; the valvae with a long stalk and a distinctly inflated cucullus with dense setae on the ventral surface; the slender left valvella with sparse setae distally and the absence of right valvella. In the female genitalia, Ressia can be distinguished by the sterigma symmetrical or asymmetrical, and the ductus seminalis arising from the corpus bursae right anterior to the ductus bursae. Ressia is similar to the Polynesian genus Iressa Clarke, 1917 in venation (Fig. 2). Zhang & Li (2010) gave a more detailed diagnosis of the two genera.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF99FFF4FF78D846FCEC20C7.taxon	description	(Figs 3, 9, 15)	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF99FFF4FF78D846FCEC20C7.taxon	description	Additional material. Henan: 1 ♁, Mt. Baiyun, Song County, 580 m, 18. VII. 2002, leg. XP Wang, slide No. ZD 21575; Hubei: 1 ♁, Songluo Town, Shennongjia (31.66 ° N, 110.60 ° E), 870 m, 22. VII. 2017, leg. WD Qi et al., slide No. ZD 21566; Shaanxi: 1 ♁, Songping Temple, Mt. Taibai, 16. VII. 2005, leg. P You, slide No. ZD 21574; Sichuan: 2 ♁, Caoping Village, Sanjiang Town, Wenchuan County (30.95 ° N, 103.32 ° E), 1557 m, 11. VII. 2014, leg. KJ Teng et al., slide Nos. ZD 21583, ZD 21586.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF99FFF4FF78D846FCEC20C7.taxon	diagnosis	Diagnosis. Adult (Fig. 3). Wingspan 10.0 – 11.5 mm. Ressia auriculata is diagnosed by the subtriangular pleural lobes of the male eighth segment with a bunch of short apical thorns, the auriculate cucullus in the male genitalia (Fig. 9), and the symmetrical sterigma with a sclerotized horn-shaped ventral sac in the female genitalia (Fig. 15).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF99FFF4FF78D846FCEC20C7.taxon	distribution	Distribution. China (Henan, Hubei, Shaanxi, Sichuan).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF98FFF2FF78D8EAFC6722BA.taxon	description	(Figs 4, 10, 16) urn: lsid: zoobank. org: act: 65 A 44 BC 5 - AED 7 - 4 E 00 - 9955 - 3035 C 7 C 1 CA 27	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF98FFF2FF78D8EAFC6722BA.taxon	materials_examined	Type material. Holotype ♁. CHINA, Hainan: Tianchi, Jianfengling (18.73 ° N, 108.86 ° E), 787 m, 9. III. 2016, leg. QY Wang et al., slide No. ZD 21076. Paratypes: 5 ♁ 1 ♀, same data as holotype, except dated 5 – 8. III. 2016, leg. QY Wang et al., slide No. ZD 21077 ♁, ZD 21577 ♁, ZD 21584 ♀.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF98FFF2FF78D8EAFC6722BA.taxon	diagnosis	Diagnosis. The new species can be distinguished from its congeners by the forewings with markings of bluish-green metallic luster, and having a small silvery white stripe at the tornus; in the male genitalia by the falculate valvae; and the pleural lobes of the male eighth segment with two apical processes greatly different in shape and length.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF98FFF2FF78D8EAFC6722BA.taxon	description	Description. Adult (Fig. 4). Wingspan 9.5 – 11.0 mm. Head. Vertex dark brown, frons grayish yellow. Antenna dark brown except grayish yellow at apex dorsally, grayish yellow ventrally. Labial palpus with second palpomere yellow, mixed with black scales in distal half; third palpomere dark brown, yellow dorsobasally. Thorax. Dorsum of mesothorax and tegula dark brown. Forewing dark brown; markings silvery white, with bluish-green metallic luster: subbasal fascia almost uniformly wide, straight, extending from basal 1 / 4 of costal margin to dorsum; wedge-shaped stripe at 1 / 2 and 3 / 4 of costal margin as well as near end of fold respectively, tornal stripe smallest and narrowest; fringe concolorous to forewing. Hindwing and fringe dark brown. Fore- and midlegs with coxae and femora dark brown ventrally, yellowish white dorsally, tibiae and tarsi dark brown, tibiae yellowish white at 1 / 2 and apex dorsally, first tarsomere ringed with yellowish white at base and apex, 4 – 5 tarsomeres white; hindleg with femur and tibia dark brown except tibia yellowish white at 1 / 2 and apex on outer surface, yellowish white on inner surface, 1 – 2 tarsomeres dark brown, first tarsomere ringed with yellowish white at apex, 3 – 5 tarsomeres white. Male abdomen and genitalia (Fig. 10): Abdomen. Furcate process of eighth tergum indistinctly narrowed to rounded apex. Pleural lobes of eighth segment subrectangular, produced at middle on dorsal margin, obtuse on ventral margin; apex with two processes: dorsal process very small, triangular, ventral process long, slightly broadened medially, distinctly narrowed distally, hooked apically. Male genitalia. Socus with left brachium spatulate, about 2 / 5 length of right brachium; right brachium slender, curved at distal 1 / 5, pointed at apex. Valva falculate, slightly broad at base, uniformly slender from near base to cucullus; cucullus narrowed to apex, with dense setae on ventral surface. Left valvella slender, curved at basal 3 / 4, with sparse setae at apex. Phallus tapered to distal 1 / 5, narrowly rounded at apex. Female genitalia (Fig. 16). Apophyses posteriores about 1.5 times as long as apophyses anteriores. Sterigma subtrapezoidal, with a sclerotized horn-shaped ventral sac. Antrum short, funnel-shaped. Ductus bursae membranous, as long as apophyses posteriores. Corpus bursae elongate subrectangular, about three times length of ductus bursae; signum absent.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF98FFF2FF78D8EAFC6722BA.taxon	distribution	Distribution. China (Hainan).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF98FFF2FF78D8EAFC6722BA.taxon	etymology	Etymology. The specific epithet is derived from the Latin disparilis, referring to the two differently sized and shaped apical processes of the pleural lobes of the male eighth segment.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF2FF78DB77FE072436.taxon	description	(Figs 5, 11) urn: lsid: zoobank. org: act: 65792874 - FDA 7 - 45 DC- 9406 - C 90 F 1767 BA 5 C	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF2FF78DB77FE072436.taxon	materials_examined	Type material. Holotype ♁. CHINA, Guangxi: Hongtan, Huaping, Lingui County (25.61 ° N, 109.97 ° E), 842 m, 4. VIII. 2022, leg. H Sun et al., slide No. ZD 21568. Paratype: 1 ♁, Dongma, Mt. Jiuwan, Rongshui County (25.17 ° N, 108.81 ° E), 866 m, 28. VII. 2022, leg. H Sun et al., slide No. ZD 21569.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF2FF78DB77FE072436.taxon	diagnosis	Diagnosis. The new species is diagnosed by the forewing markings with pale bluish metallic luster, and by the left pleural lobe of the male eighth segment with a triangular dorsoapical process and an elongate ventroapical process. The new species is similar to R. sinevi sp. nov., and the differences between them are stated in the diagnosis of the latter species.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF2FF78DB77FE072436.taxon	description	Description. Adult (Fig. 5). Wingspan 10.0 – 10.5 mm. Head. Vertex dark brown, frons grayish yellow. Antenna with scape dark brown except yellow at apex dorsally, grayish yellow ventrally; flagellum dark brown alternated with grayish yellow dorsally, grayish yellow ventrally. Labial palpus dark brown, except third palpomere yellow basally. Thorax. Dorsum of mesothorax and tegula dark brown. Forewing dark brown; markings silvery white, with pale bluish-metallic luster: subbasal fascia from basal 1 / 4 of costal margin to dorsum, narrow anteriorly, wide posteriorly; short stripe at 1 / 2 and subtriangular spot at 3 / 4 of costal margin respectively, wedge-shaped spot at end of fold, ill-defined spot at tornus; fringe dark brown. Hindwing and fringe dark brown. Fore- and midlegs dark brown, except coxae and femora yellowish white dorsally, tibiae yellowish white at 1 / 2 and apex, first tarsomere ringed with yellowish white at base and apex, 4 – 5 tarsomeres yellowish white; hindleg with femur and tibia dark brown except tibia yellowish white at 1 / 2 and apex on outer surface, yellowish white on inner surface, first tarsomere dark brown, other tarsomeres yellowish white. Male abdomen and genitalia (Fig. 11): Abdomen. Furcate process of eighth tergum forcipate, narrowed towards pointed apex, curved inward, sclerotized on inner margin. Pleural lobes of eighth segment subrectangular, asymmetrical: left lobe broadly concave medioapically, forming two distinct processes: dorsoapical process triangular, ventroapical process longer, dilated distally; right lobe with dorsal and ventral margins convolved distally, apex obliquely outward, slightly concave. Male genitalia. Socus with left brachium spatulate, about 1 / 3 length of right brachium; right brachium with basal 1 / 3 wide, distal 2 / 3 slender, curved at distal 1 / 5, pointed at apex. Valva with stalk uniformly slender; cucullus dilated subovately, with dense setae ventrally. Left valvella slender, weakly sinuate, distally broadened ovately, with dense setae. Phallus slightly narrower distally, bent near apex, blunt at apex. Female. Unknown.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF2FF78DB77FE072436.taxon	distribution	Distribution. China (Guangxi).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF2FF78DB77FE072436.taxon	etymology	Etymology. The specific epithet is derived from the Latin forcipatus, referring to the shape of the furcate process of the eighth tergum.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF1FF78DCFBFAC823EE.taxon	description	(Figs 6, 12, 17)	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF1FF78DCFBFAC823EE.taxon	materials_examined	Material examined. CHINA, Jilin: 2 ♁, Dapanling, Banshi Town, Hunchun County (42.70 ° N, 130.38 ° E), 180 m, 1. VII. 2023, leg. D Zhang, slide No. ZD 21691; 1 ♁, Yangpao Farm, Hunchun County (42.89 ° N, 130.57 ° E), 162 m, 30. VI. 2023, leg. D Zhang, slide No. ZD 21692; Liaoning: 3 ♁ 4 ♀, Mt Qian, Anshan City, 7. VII. 2010, leg. JY Liu & YP Cai, slide Nos. ZD 21579 ♁, ZD 21580 ♀; Shanxi: 3 ♁, Manghe, Yangcheng County, 594 m, 17. VII. 2012, leg. W Guan & XC Wang, slide No. ZD 21160; Zhejiang: 2 ♁ 3 ♀, Daishan Island, Zhoushan City (30.23 ° N, 122.20 ° E), 21 m, 5. VIII. 2016, leg. QY Wang et al., slide Nos. ZD 21573 ♁, ZD 21578 ♀.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF1FF78DCFBFAC823EE.taxon	diagnosis	Diagnosis. Adult (Fig. 6). Wingspan 10.0 – 11.5 mm. Ressia quercidentella is diagnosed by the furcate process of the eighth tergum slightly broadened distally, the left dorso- and ventroapical processes of the asymmetrical pleural lobes of the eighth segment larger and longer than the right apical processes; the cucullus boot-shaped in the male genitalia (Fig. 12); and the large ring-shaped sterigma with a small sclerotized ring-shaped process at left side in the female genitalia (Fig. 17).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9EFFF1FF78DCFBFAC823EE.taxon	distribution	Distribution. China (Henan, Jilin, Liaoning, Shanxi, Tianjin, Zhejiang), Korea, Russia (Far East).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFF1FF78DBC2FF26256A.taxon	description	(Figs 7, 13, 18) urn: lsid: zoobank. org: act: 5 A 37 CDAF- 6 DCB- 46 F 9 - 9 EA 8 - 3 FB 1 D 4523 D 5 F	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFF1FF78DBC2FF26256A.taxon	materials_examined	Type material. Holotype ♁. CHINA, Hainan: Tianchi, Jianfengling (18.73 ° N, 108.86 ° E), 787 m, 15. I. 2016, leg. QY Wang et al., slide No. ZD 21571. Paratypes: 1 ♁, Shuiman Town, Wuzhishan City, 650 m, 15. V. 2007, leg. ZW Zhang & WC Li, slide No. ZZW 08027; 1 ♁ 1 ♀, Wuzhishan, 738 m, 2. XI. 2016, leg. X Bai et al., slide Nos. ZD 21562 ♁, ZD 21582 ♀.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFF1FF78DBC2FF26256A.taxon	diagnosis	Diagnosis. The new species can be distinguished from its congeners by the forewings with markings encircled by black scales and the white subbasal fascia with anterior 1 / 4 much narrower and ill-defined; in the male genitalia by having a semilunate cucullus; and in the female genitalia by having a short tubular sterigma.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFF1FF78DBC2FF26256A.taxon	description	Description. Adult (Fig. 7). Wingspan 11.0 – 12.0 mm. Head. Vertex dark brown, frons grayish yellow. Antenna with scape pale yellow dorsally, dark brown ventrally, ringed with white terminally; flagellum with basal 2 / 3 dark brown and pale yellow dorsally, pale yellow ventrally, distal 1 / 3 pale yellow. Labial palpus with second palpomere pale yellow, dark brown at apex; third palpomere dark brown, pale yellow dorsobasally. Thorax. Dorsum of mesothorax and tegula dark brown. Forewing dark brown; markings white encircled by black scales: subbasal fascia from basal 1 / 4 of costal margin to dorsum, its anterior 1 / 4 much narrower and ill-defined, smaller spot at 1 / 2 and larger spot at 5 / 6 of costal margin respectively, subtriangular spot at end of fold; fringe concolourous to forewing. Hindwing and fringe dark brown. Legs with coxae and femora yellowish white, tibiae and tarsi dark brown, except tibiae yellowish white at basal 1 / 6, 1 / 2 and apex; first tarsomere ringed with yellowish white at base and apex, 4 – 5 tarsomeres yellowish white. Male abdomen and genitalia (Fig. 13): Abdomen. Furcate process of eighth tergum with outer margin produced outward medially, with pointed apex. Pleural lobes of eighth segment oval, with a furcella at base on dorsal margin. Male genitalia. Socus with left brachium spatulate, about 1 / 4 length of right brachium; right brachium with basal 1 / 4 wide, uniformly slender medially, sharply narrowed from distal 1 / 4 to pointed apex, curved at distal 1 / 6, hooked apically. Valva with stalk aequilate; cucullus semilunate, with dense setae on ventral surface. Left valvella slender, curved at middle, slightly inflated distally, with dense setae ventrodistally. Phallus with basal 2 / 3 tubular, distal 1 / 3 tapered to narrowly rounded apex. Female genitalia (Fig. 18). Apophyses posteriores 1.5 times as long as apophyses anteriores. Sterigma tubular, with a sclerotized ventral sac. Antrum relatively short, concave at middle on posterior margin. Ductus bursae membranous, twice length of apophyses posteriores. Corpus bursae pyriform, shorter than ductus bursae; signa being five small subcircular plates with small erect lamellar processes.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFF1FF78DBC2FF26256A.taxon	distribution	Distribution. China (Hainan).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFF1FF78DBC2FF26256A.taxon	etymology	Etymology. The specific epithet is derived from the Latin semi- and lunatus, referring to the shape of the cucullus.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFFFFF78DD46FCCA274F.taxon	description	(Figs 8, 14, 19) urn: lsid: zoobank. org: act: D 1 FBC 5 F 8 - D 3 DE- 4 BC 2 - A 218 - C 14 F 44 E 16223	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFFFFF78DD46FCCA274F.taxon	materials_examined	Type material. Holotype ♁. CHINA, Sichuan: Hailuogou, Luding County (29.60 ° N, 102.10 ° E), 1695 m, 1. VII. 2016, leg. KJ Teng & XF Yang, slide No. ZD 21576. Paratypes: 3 ♁ 5 ♀, Hailuogou, Luding County (29.60 ° N, 102.10 ° E), 1695 m, 30. VI – 1. VII. 2016, leg. KJ Teng & XF Yang, slide No. ZD 21585 ♀.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFFFFF78DD46FCCA274F.taxon	diagnosis	Diagnosis. The new species is similar to R. forcipata sp. nov. in the shape of the valva, the valvella and the phallus. It can be distinguished by the markings of the forewing without metallic luster, and by the symmetrical pleural lobes of the male eighth segment. In forcipata sp. nov., the markings of the forewing possess a pale bluish-metallic luster, and the pleural lobes of the eighth segment are asymmetrical.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFFFFF78DD46FCCA274F.taxon	description	Description. Adult (Fig. 8). Wingspan 11.0 – 13.0 mm. Head. Vertex dark brown, frons grayish yellow. Antenna with scape dark brown dorsally, grayish yellow ventrally; flagellum grayish yellow, annulated with dark brown in basal 2 / 3 dorsally. Labial palpus dark brown, except third palpomere yellow dorsally. Thorax. Dorsum of mesothorax and tegula dark brown. Forewing dark brown; markings white: subbasal fascia almost uniformly narrow, extending from basal 1 / 5 of costal margin to dorsum; irregularly shaped spot at 1 / 2 and 3 / 5 of costal margin respectively, banded speckle at end of fold; fringe dark brown, tinged with white around apex. Hindwing and fringe dark brown. Fore- and midlegs dark brown, except coxae and femora yellowish white dorsally; hindleg with femur and tibia dark brown on outer surface, yellowish white on inner surface, tibia yellowish white at 1 / 2 and apex, tarsus with 1 – 2 tarsomeres dark brown, first tarsomere ringed with yellowish white at base and apex, 3 – 5 tarsomeres white. Male abdomen and genitalia (Fig. 14): Abdomen. Furcate process of eighth tergum narrowed towards pointed apex, sclerotized and straight on inner margin. Pleural lobes of eighth segment narrow at base, widened to almost straight apex. Male genitalia. Socus with left brachium spatulate, about 1 / 3 length of right brachium; right brachium with basal 1 / 3 wide, distal 2 / 3 slender, pointed at apex. Valva with stalk uniformly wide; cucullus subelliptical, densely setose on ventral surface. Left valvella slender, curved at middle, inflated from subapex to apex, with setae ventrodistally. Phallus slightly narrower distally, bent before obtuse apex. Female genitalia (Fig. 19). Apophyses posteriores about 1.5 times length of apophyses anteriores. Sterigma subtrapezoidal, with a sclerotized ventral sac. Antrum short, funnel-shaped. Ductus bursae membranous, twice as long as apophyses posteriores. Corpus bursae spherical, slightly longer than apophyses posteriores; signum absent.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFFFFF78DD46FCCA274F.taxon	distribution	Distribution. China (Sichuan).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF9DFFFFFF78DD46FCCA274F.taxon	etymology	Etymology. The species is named after the famous Russian entomologist Dr. S. Yu. Sinev in recognition of his contribution to the study of the family Cosmopterigidae.	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF93FFFFFF78DF63FDEC242C.taxon	diagnosis	Diagnosis. Ressia tonkinella can be distinguished by the forewing with four distal speckles and the male pleural lobes with two ventroapical processes; in the male genitalia by the stalk of the valva geniculate medially (Sinev 1988, p. 115, fig. 13).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
03B1879AFF93FFFFFF78DF63FDEC242C.taxon	distribution	Distribution. Vietnam (Tonkin).	en	Zhang, Di, Li, Houhun (2023): Review of the genus Ressia Sinev, 1988 (Lepidoptera: Cosmopterigidae), with descriptions of four new species from China. Zootaxa 5360 (4): 583-592, DOI: 10.11646/zootaxa.5360.4.7, URL: https://www.mapress.com/zt/article/download/zootaxa.5360.4.7/52135
