Eosyntexis Rasnitsyn, 1990

Li, Yi, Rasnitsyn, Alexandr P., Shih, Chungkun, Ren, Dong & Wang, Mei, 2024, New fossil Anaxyelidae (Insecta: Hymenoptera: Siricoidea) from the Lower Cretaceous Yixian Formation of northeastern China, Zootaxa 5562 (1), pp. 107-121 : 112

Genus Eosyntexis Rasnitsyn, 1990

Type species. Eosyntexis senilis Rasnitsyn, 1990 .

Species included. Eosyntexis senilis Rasnitsyn, 1990 ; Eosyntexis tuffinae Rasnitsyn, 1998 ; Eosyntexis catalonicus Rasnitsyn and Martínez-Delclòs, 2000 ; Eosyntexis parva Ortega-Blanco, Rasnitsyn and Delclòs, 2008 .

Revised diagnosis. Forewing with pterostigma sclerotized, not reaching midlength of cell 3r; crossvein 2r-rs at midlength of pterostigma (not near apex); 1r-rs lost; Rs+M typically bifurcating right next to or slightly distally 1m-cu; vein 1-Rs proclival, issuing before the 1-M and 1-Cu bifurcation, more than twice as long as 1-M; section 3-Cu shorter than 4-Cu. Ovipositor short, its apical section less than basal section.

Remarks. Eosyntexis is the most diverse genus in Syntexinae that differs from all other genera in having a combination of the crossvein 1r-rs completely lost and 1-Rs long (more than twice as long as 1-M) and proclival (1-Rs issuing before the 1-M and 1-Cu bifurcation).