Euthemistidae Pritykina, 1968

Li, Yongjun, Nel, Andre, Shih, Chungkun, Ren, Dong & Pang, Hong, 2013, The first euthemistid damsel-dragonfly from the Middle Jurassic of China (Odonata, Epiproctophora, Isophlebioptera), ZooKeys 261, pp. 41-50 : 42

Family Euthemistidae Pritykina, 1968

Genus included.

type genus Euthemis Pritykina, 1968 and Sinoeuthemis gen. n.

Emended familial diagnosis.

Several long intercalary veins between IR1 and RP1, and between IR1 and RP2, as well as between RP3/4 and IR2, and between IR2 and RP2 (intercalaries parallel to main longitudinal veins without apparent origin on them, but originating in cross-venation); extremely narrow postdiscoidal area (in forewings and probably also in hindwings); not petiolate; numerous secondary antenodal crossveins between anterior wing margin and ScP distal of Ax2; discoidal cells opened in forewing and closed in hindwing; hindwing subdiscoidal area transverse, posteriorly closed, short and broad, with vein CuAb makes a strong angle with AA; hindwing gaff (basal CuA before its branching) not very long; RP2 aligned with subnodus; crossveins in hindwing postdiscoidal space are not very long and not oblique.