Jibaissodes Ren, Lu, Guo & Ji, 1995

Wang, Yimo, Wang, Mei, Shih, Chungkun, Rasnitsyn, Alexandr P., Yao, Jun, Ren, Dong & Gao, Taiping, 2019, A new sawfly of Megalodontesidae (Insecta, Hymenoptera, Pamphilioidea) with pectinate antennae from the Early Cretaceous of China, ZooKeys 893, pp. 115-123 : 115

Genus Jibaissodes Ren, Lu, Guo & Ji, 1995

Emended diagnosis.

Mesonotum large, notauli strongly impressed, tapering to acutely rounded base. Forewing veins 1-Rs and 1-M nearly in straight line; 1r-rs present, shorter than 2r-rs; 1r-rs reclival and 2r-rs proclival; 1m-cu near base of cell 2rm; 1cu-a at base of cell 1mcu, connecting to juncture of M+Cu; cell 1mcu small, nearly rectangular; cell 2rm longer than cell 3rm. Hind wing with 1-Cu nearly perpendicular to cu-a; 1A and 2A strongly curved.

Type species.

Jibaissodes giganteus Ren, Lu, Guo & Ji, 1995

Emended description.

Fossil incomplete: head appendages, pronotum, legs, abdomen and supposedly posterior parts of wings missing. Head moderately large, near oval; compound eyes large; ocelli not visible. Mesonotum broader than long; mesoscutum small, with distinct medial line and impressed notauli; mesoscutellum indistinct; metanotum narrow and long; metascutum with cenchri present but indistinct. Forewing ( Fig. 1E ) with Sc absent; pterostigma long, completely infuscated; 1-Rs reclival, slightly shorter than 1-M; 1-M long and straight; Rs-M juncture nearly straight; Rs+M straight, forming a nearly straight line with 2-M, nearly perpendicular to 1-M; 1r-rs slightly shorter than 2r-rs; 2r-rs distinctly proclival, positioned near distal 0.75 of pterostigma; 1cu-a straight, distinctly bent towards wing tip; M+Cu straight; 1-Cu and 2-Cu curved, 1-Cu nearly equal to 2-Cu; 2r-m straight and reclival; 3r-m straight towards wing tip; 1A slightly curved. Costal cell slightly widened before point of origin of Rs; cell 2rm distinctly longer than cell 3rm, cell 3rm trapezoid; cell 1mcu small, nearly rectangular; cell 2mcu large, pentagonal. Hind wing ( Fig. 1F ) with 1-Rs very short, 1r-m straight; 1r-m and 1-M forming a straight line. M+Cu slightly bent; 1-Cu slightly curved, nearly perpendicular to cu-a; cu-a nearly straight; vein 1A strongly arched.

Other species included.

Jibaissodes bellus Gao, Shih, Labandeira, Santiago-Blay, Yao & Ren, 2016; Jibaissodes peichenae sp. nov.

Figures

Figure 1. A-D Jibaissodes peichenae sp. nov., holotype, part: A photograph of complete specimen B line drawing of complete specimen C line drawing of forewing D line drawing of hind wing E, F Jibaissodes giganteus, holotype: E line drawing of forewing F line drawing of hind wing. Scale bars: 2 mm (A, B), 1 mm (C-F).