taxonID	type	description	language	source
AA51B55DFFA5581A17DBEE34FE57FC23.taxon	diagnosis	Diagnosis. Opostega Zeller is similar to Pseudopostega Kozlov, 1985 but can be distinguished by the valva without a basal process and the juxta not rod-shaped in the male genitalia, and the presence of the anterior apophyses in the female genitalia. In Pseudopostega, the valva has a distinct basal process and the juxta is rod-shaped, and the anterior apophyses is absent.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581A17DBEE34FE57FC23.taxon	discussion	Note. Davis (1989) stated that the aedeagus was absent in the genera Opostega and Pseudopostega. Puplesis & Robinson (1999) explained that the aedeagus was indistinct because of its weak sclerotization. In this study, we found the aedeagus present in O. apicidissecta sp. nov. and absent in O. magnirotunda sp. nov., which is irrelevant to the degree of sclerotization.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581917DBE849FE25FE3E.taxon	description	urn: lsid: zoobank. org: act: 8 A 17 CED 0 - E 89 F- 467 D- 93 CF- 54571 F 4 B 5 E 4 F (Figs 1, 3)	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581917DBE849FE25FE3E.taxon	materials_examined	Type material. Holotype. [CHINA] ♂, Beitun, 512 m, Xinjiang, 20 vii 2007, leg. XP Wang et al., slide No. SH 21196.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581917DBE849FE25FE3E.taxon	diagnosis	Diagnosis. The new species is similar to O. spatulella Herrich-Schäffer, 1855 and O. magnirotunda sp. nov. in male genitalia. It can be distinguished from them by the presence of an aedeagus, which is absent in both comparison species. It further differs from O. spatulella by the forewing without a dark brown apical speckle, and in male genitalia by the hook-shaped costal process of the valva (in O. spatulella, the forewing has a dark brown apical speckle, and the costal process of the valva is almost straight) (Nieukerken 1990: 368). The new species can be further distinguished from O. magnirotunda by the tegumen-vinculum ring without a round sclerite and the costal margin of the valva almost straight (in O. magnirotunda, the tegumen-vinculum ring has a round sclerite ranging from anterior 2 / 7 to 3 / 4, and the costal margin of the valva is sinuate). The differences between O. magnirotunda sp. nov. and O. apicidissecta sp. nov. are stated in the diagnosis of the latter species.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581917DBE849FE25FE3E.taxon	description	Description. Adult (Fig. 1). Male wingspan 8.5 mm. Head: Vertex and frons cream white. Maxillary palpus white. Labial palpus pale yellow. Antenna with scape white, flagellum brownish yellow. Collar cream white. Thorax: Mesonotum pale yellow, with scattered brown scales; tegula pale yellow. Forewing ground color pale yellow, tinged with silvery white luster; costal spot brown, extending from distal 2 / 5 of costal margin downward to distal 1 / 4 of vein M; dorsal spot brown, beyond middle of dorsum; fringe pale yellow, mixed with brown scales. Hindwing silvery white; fringe pale yellow. Foreleg brownish bronzy except tarsus yellow; midleg silvery white; hindleg yellow. Abdomen: Yellowish brown. Male genitalia (Fig. 3). Uncus lobes semicircular, setose posteriorly. Tegumen-vinculum ring inflated posterolaterally, uniformly slender anteriorly. Gnathos with a semicircular anteromedial emargination; basal arm wide, heavily sclerotized, shorter than mesial process; mesial process tapered to pointed apex. Valva with main body subovate, costal margin almost straight, ventral margin broadly rounded; costal process 0.41 × length of valva, narrowed to obtusely rounded apex; pedicel 0.17 × length of valva, widened towards cucullar lobe; cucullar lobe 1.9 × width of pedicel, with dense setae, pectinifer with 27 blunt spines. Aedeagus 0.62 × length of tegumen-vinculum ring, slightly arched. Juxta 1.4 × length of aedeagus, distal 1 / 3 inflated laterally, apex deeply concave at middle, forming two large distal lobes. Female unknown.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581917DBE849FE25FE3E.taxon	distribution	Distribution. China (Xinjiang).	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA5581917DBE849FE25FE3E.taxon	etymology	Etymology. The specific epithet is derived from the Latin apic - and dissectus, referring to the juxta deeply concave medioapically.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA6581817DBEA94FD0AFBFE.taxon	description	urn: lsid: zoobank. org: act: D 6 B 92 C 19 - C 1 B 4 - 4 FC 7 - BA 1 B- 668 F 72607 FD 3 (Figs 2, 4)	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA6581817DBEA94FD0AFBFE.taxon	materials_examined	Type material. Holotype. [CHINA] ♂, Hongxin Village, Yuanmen Town, Baisha County, 445 m, Hainan, 20 iii 2016, leg. QY Wang, SR Li and SN Zhao, slide No. SH 21107. Paratypes. [CHINA] 2 ♂, same data as holotype, slide No. SH 21129.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA6581817DBEA94FD0AFBFE.taxon	diagnosis	Diagnosis. The new species is similar to O. apicidissecta sp. nov. and O. spatulella Herrich-Schäffer, 1855 in male genitalia. It can be distinguished by the tegumen-vinculum ring with a large semicircular sclerite, which is absent in O. apicidissecta and O. spatulella. It can be further distinguished from O. spatulella by the valva with the costal process hook-shaped and the juxta inflated laterally in distal 2 / 5 (in O. spatulella, the costal process of the valva is almost straight and the juxta is not inflated laterodistally) (Nieukerken 1990: 368).	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA6581817DBEA94FD0AFBFE.taxon	description	Description. Adult (Fig. 2). Male wingspan 7.5 – 8.0 mm. Head: Vertex pale brown; frons brownish yellow, surrounded by cream white scales. Maxillary palpus dark brown. Labial palpus pale yellowish brown. Antenna with scape pale yellow, flagellum dark brown. Collar pale brown. Thorax: Mesonotum pale yellow except black anteromedially; tegula pale brown. Forewing ground color pale yellowish brown, with dark brown scales, slightly denser along costal margin in distal 1 / 4 and along termen; both costal and dorsal spots dark brown; costal spot at distal 1 / 4, dorsal spot beyond middle of dorsum; fringe pale yellowish brown, with scattered brown scales. Hindwing pale yellow; fringe pale brown. Fore- and midlegs bronzy brown; hindleg yellow except tarsus pale brown. Abdomen: Yellowish brown. Male genitalia (Fig. 4). Uncus lobes subsemicircular, with dense setae. Tegumen-vinculum ring rounded anteriorly, with a large semicircular sclerite extending from anterior 2 / 7 to 3 / 4, connected with tegumen-vinculum ring posterolaterally. Gnathos with a shallow semicircular anterior emargination; basal arm longer than mesial plate; mesial process tapered to pointed apex. Valva with main body subovate, slightly broadened from base to pedicel, costal margin slightly concave near pedicel, ventral margin obtusely arched; costal process 0.35 × length of valva, hook-shaped, obtusely rounded at apex; pedicel wrinkled, 0.30 × length of valva; cucullar lobe 1.3 × length of pedicel; pectinifer with 21 – 23 blunt spines. Aedeagus absent. Juxta 0.69 × length of valva; inflated distally, slightly concave at middle apically. Female unknown.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA6581817DBEA94FD0AFBFE.taxon	distribution	Distribution. China (Hainan).	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
AA51B55DFFA6581817DBEA94FD0AFBFE.taxon	etymology	Etymology. The specific epithet is derived from the Latin magn - and rotundus, referring to the tegumen-vinculum ring with a large semicircular sclerite.	en	Sun, Hao, Wang, Shuxia (2025): First report of the genus Opostega Zeller, 1839 (Lepidoptera, Opostegidae) from China, with descriptions of two new species. Zootaxa 5660 (2): 267-272, DOI: 10.11646/zootaxa.5660.2.7, URL: https://doi.org/10.11646/zootaxa.5660.2.7
