Hemisyntexis Li, Wang, Rasnitsyn & Shih 2024, gen. nov.

Genus Hemisyntexis Li, Wang, Rasnitsyn & Shih, gen. nov. urn:lsid:zoobank.org:act: DF01EA9F-051E-4115-8BB2-3B749CE51B9F Type Species. Hemisyntexis lepida Li, Wang, Rasnitsyn & Shih, sp. nov. Etymology. The generic name is a combination of Greek “ Hemi- ”, meaning half and referring to the pterostigma without sclerotized part basally, and the generic name Syntexis. Diagnosis. Mesonotum with scuto-scutellar sulci 1.5 times as long as notauli. Forewing with costal area narrow uniformly; pterostigma wedge, desclerotized basally, the rest part completely sclerotized, 0.6 times as long as 2r-rs; Sc absent; 2r-rs issuing from pterostigma at its mid-length; cell 2r darkened; 1-Rs proclival, twice as long as 1-M; 2-Rs front of 1m-cu, 2-M less than half 2-Rs length; 5-M (section between 3r-m and wing margin) as long as 2m-cu; cell 3r 1.3 times as long as cells 1r and 2r together; cell 1mcu hexagonal. Remarks. The new genus is unique within Syntexinae in having pterostigma not sclerotized basally. It belongs to the basal group of genera which retain 1r-rs and long and proclival 1-Rs. This group also includes Syntexis Rohwer, 1915, Dolichosyntexis Kopylov, 2019, Daosyntexis Kopylov, 2020, Parasyntexis Kopylov, 2020 and Hanguksyntexis Rosse-Guillevic et al., 2023. Within this group, Hemisyntexis is additionally unique in having pterostigma not reaching the middle 3r cell (vs., pterostigma reaching the middle 3r cell in Dolichosyntexis) and narrow (at 2r-rs, much narrower than length of 2r-rs, vs. at most as wide there as 2r-rs long).