ordo
Plectoptera 
subordo Protephemeroidea
Handlirsch (ordo)
gen. Triplosoba
subordo Permoplectoptera
n. suborder 
fam. Protereismatidae Sell. 
Protereisma
= Protereismephemeridae Sell. 1907 
gen. Protereisma Sellards 1907
fam. Misthodotidae n. fam. Misthodotes
gen. Misthodotes Sellars 1907
Euplectoptera
present day mayflies, in which the hindwing is
reduced or absent and is coupled in flight with the fore in amplexiform manner