Curiosyntexis Kopylov, 2019

Kopylov, Dmitry S., 2019, New anaxyelids (Hymenoptera: Anaxyelidae) from the Cretaceous of Asia, Zootaxa 4603 (2), pp. 341-353 : 349

Genus Curiosyntexis Kopylov , gen. nov.

Etymology. The name is derived from Latin curiosus—curious and generic name Syntexis . Gender masculine.

Type species. C. magadanicus sp. nov.

Species included. Type species only.

Distribution. Upper Cretaceous of Magadan.

Diagnosis. Fore wing with costal area almost absent; pterostigma short and broad, widely unsclerotized; both 1r-rs and 2r-rs present, 1r-rs incomplete and not reaching R1, potentially longer than 2r-rs; cell 1mcu pentagonal, Rs+M furcating at the level of 1m-cu; veins 3r-m and 2m-cu strongly displaced basad; tubular veins not developed beyond line connecting apices of pterostigma and 1A. Ovipositor short, scarcely protruding beyond abdominal tip.

Comparison. Curiosyntexis differs from all other genera of Syntexinae in having 3r-m and 2m-cu strongly displaced basad and in absence of tubular veins beyond pterostigma. Partly developed 1r-rs is rare within Syntexinae : Eosyntexis and Cretosyntexis completely lacks this vein, while Parasyntexis and Dolichosyntexis has this vein fully developed. But in recent genus Syntexis this character is polymorphic, some specimens have 1r-rs complete, others have it partly developed like in Curiosyntexis. The new genus also differs from Cretosyntexis in having Rs+M furcates at the level of 1m-cu; from other genera excluding Syntexis in having pterostigma widely unsclerotized; from Syntexis and Parasyntexis in having short ovipositor.