NOMEN: Permoplectoptera Tillyard 1932 [R.J. Tillyard. Kansas Permian insects. Part 15. The order Plectoptera. – Amer. Journ. Sci., 1932, 23: 97-172]
ORIGINAL LISTED MEMBERSHIP (Tillyard
1932): †Protereismatidae +
†Misthodotidae
SENIOR CIRCUMSCRIPTIONAL SYNONYM:
= Protereismephemeridae Sellards 1907
TYPIFIED NAME IN BASIC FORMAT: Protereisma/f=Phtharthus/g
TYPIFIED NAMES IN USE: Protereismidae, Protereismatoidea
MODERN
STATUS: 
the valid, the
oldest name of a generally accepted, extinct plesiomorphon.
Systematic position of Permoplectoptera:
| Panephemeroptera,
or Ephemeroptera s.1 (Ephemera/fg1) † Protephemeroidea (Triplosoba/fg1) Euephemeroptera, or Ephemeroptera s.2 (Ephemera/fg2) † Permoplectoptera (Protereisma/f1=Phtharthus/g1) Euplectoptera, or Ephemeroptera s.3 (Ephemera/fg3) |
COMMENT. The older name Protereismephemeridae, being non-typified, by its form resembles typified names, such as Protereismatidae (i.e. Protereisma/f) and Ephemeridae (i.e. Ephemera/f). Because of this, its junior circumscriptional synonym Permoplectoptera is preferable.