NOMEN: Panmegasecoptera Crampton 1928 [G.C. Crampton. The grouping of the insect orders and their lines of descent. Entomologist, 1928, 61: 85]
ORIGINAL LISTED MEMBERSHIP (Crampton 1928): Megasecopterida (= "Megasecoptera") + Diaphanoptera/fg
SENIOR CIRCUMSCRIPTIONAL SYNONYMS:
= Megasecoptera Handlirsch 1906 (non Handlirsch 1919)
= Megasecopteridae Lameere 1917
NON-MONOSEMANTIC CIRCUMSCRIPTIONAL SYNONYM (with uncertain position of †Diaphanoptera):
= Megasecopterida Brongniart 1885 s.l.
TYPIFIED NAME IN BASIC FORMAT: Mischoptera/fg (incl. Diaphanoptera)
TYPIFIED NAMES IN USE:
MODERN
STATUS: 
the valid (while not the
oldest) name of a generally accepted, holophyletic, extinct taxon.
COMMENT. For the taxon uniting Megasecopterida s.str. and Eudiaphanoptera, the oldest circumscriptional name is Megasecoptera, published by Handlirsch (1906-1908). But the same name "Megasecoptera" ascribed to "Brongniart 1885", is often used instead of Megasecopterida Brongniart 1885 (Handlirsch 1919, et al.). Because of this, in order to avoid a confusion, it is expedient to use a younger name Panmegasecoptera.