Kempyninae, Carpenter, 1943

Ma, Yiming, Shih, Chungkun, Ren, Dong & Wang, Yongjie, 2020, New lance lacewings (Osmylidae: Kempyninae) from the Middle Jurassic of Inner Mongolia, China, Zootaxa 4822 (1), pp. 94-100 : 98-99

Key to the extinct and extant genera of Kempyninae

Two genera Cretosmylus Makarkin, 1990 and Kempynosmylus Makarkin, 2014 are not included in this key due to their lack of key characters of Kempyninae and their subfamilial attributions are still questionable ( Winterton et al. 2019).

1. HW MP with deeply forked near the base.................................................................. 2

- HW MP forked at the middle or near the distal.............................................................. 3

2. HW MA with deeply branched, MA forked proximally to MP forking; Wings dark-colored with 3–4 perpendicular light bands..................................... † Ponomarenkius Khramov, Liu & Zhang, 2017 ( China, Middle–Late Jurassic)

- HW MA forked near the wing distal; Membrane hyaline, without wing markings............................................................................................... † Mirokempynus gen. nov. ( China, Middle Jurassic)

3. HW crossveins between MA and MP sinuous, and forming multiple rows of cells before branching of MP............... 4

- HW crossveins between MA and MP relatively straight, only forming a single row of cells before branching of MP....... 6

4. HW MP with strongly forked approaching the middle, each branch of MP with pectinated or dichotomous branches.............................................................. † Sauktangida Khramov, 2014 (Kyrgystan, Early Jurassic)

- HW MP with relatively simple pectinated or dichotomous branches near the distal wing............................. 5

5. HW presence of an additional row of regular subcostal veinlets...................................................................................... † Arbusella Khramov, 2014 ( Kazakhstan, Late Jurassic) ( China, Middle Jurassic)

- HW absence of the additional regular subcostal veinlets........................................................ † Jurakempynus Wang, Liu, Ren & Shih, 2011 ( Kazakhstan, Late Jurassic) ( Mongolia, Late Jurassic) ( China, Middle Jurassic)

6. HW MP deeply forked at the mid-length of wing; gradate series absent of both wings......................................................................... † Euporismites Tillyard in Tillyard & Dunstan, 1916 ( Australia, Paleogene)

- HW MP with dichotomous branches beyond the mid-length of wing; outer gradate series distinct of both wings.......... 7

7. HW M fork wide, crossveins between branches somewhat sinuous; large insect........................................................................... Kempynus Navás, 1912 ( Australia, New Zealand and western South America)

- HW M fork narrower, cells between branches relatively quadrate; small to medium insect............................ 8

8. Wings distinctly falcate; relatively small species (forewing length <15.0 mm)...... Euosmylus Kru ̈ger, 1913 ( New Zealand)

- Wings not or slightily falcate; relatively larger species (forewing length> 20.0 mm).................................................................................................... Australysmus Kimmins, 1940 ( Australia)