Prosyntexis, Sharkey, 1990

LI, XIAO-QIN, RASNITSYN, ALEXANDR P., GAO, JIA, ZHANG, YAN-JIE, SHIH, CHUNG-KUN, REN, DONG, ZHAO, YUN-YUN & GAO, TAI-PING, 2023, New taxa of Sepulcidae (Hymenoptera) from mid-Cretaceous Kachin amber, Palaeoentomology 6 (2), pp. 133-145 : 142-143

Key to species of Prosyntexis

1. Forewing with pterostigma narrow; 2r-rs joining pterostigma near its apex; cell 2r more than twice as long as wide................ P. montsecensis Rasnitsyn & Ansorge, 2000

- Forewing with pterostigma wide; 2r-rs joining pterostigma before its midlength; cell 2r less than twice as long as wide .................................................................................. 2

2. Forewing with costal area normal ....................................... .............................................. P. gobiensis Rasnitsyn, 1993

- Forewing with basal third or half of costal area narrowed.. .......................................................................................... 3

3. Forewing with cell 1mcu small, length to width ratio far less than 2 ........................... P. okhotensis Rasnitsyn, 1993

- Forewing with cell 1mcu normal size, length to width ratio more than 2 ....................................................................... 4

4. Forewing with 3r-m joining cell 3r almost at its midlength ...................................... P. sennlaubi Jouault & Nel, 2021

- Forewing with 3r-m joining cell 3r at well before its midlength.......................................................................... 5

5. Forewing with 2-Rs not behind 1m-cu (no 2-RS+M); forewing length more than 10 mm ..................................... .................................................... P. gouleti Sharkey, 1990

- Forewing with 2-Rs behind 1m-cu (2-RS+M present); forewing length less than 10 mm ...................................... 6

6. Length of 2m-cu to the length of 3-M of forewing less than 2 .................................. P. aristovi Li, Shih & Gao sp. nov.

- Length of 2m-cu to the length of 3-M of forewing distinctly more than 2 ....................................................................... 7

7. Forewing with Sc present; 1-RS almost as long as 1-Rs+M; hind wing 2-M+Cu absent .................................................. ................................ P. antennata Li, Shih & Gao sp. nov.

- Forewing with Sc absent; 1-RS short; hind wing 2-M+Cu present............................... P. lata Li, Shih & Gao sp. nov.