256 
Psyche 
[September 
hind wing) ; specimen No. 3/1972 (obverse and reverse probably of 
fore wing) ; Paleontological Institute of Charles University, Prague, 
Czechoslovakia. Collected in the Lower Permian deposits near 
Obora, Moravia. 
All three specimens of Alexahymen maruska carry the details of 
venation, described by Carpenter (1962, p. 38-39) in Actinohymen 
russeli , namely flattened C, widening distally beyond the end of Sc; 
and C, Sc, R~Ri around midwing touching each other. The cross 
vein rs-ri forms a heavy bar widened at its costal end in the holotype 
and specimen 3/1972. In the specimen 2/1972 it is an average, 
though thick cross vein. 
The posterior margin in the holotype is formed in a different way, 
perhaps as individual variation. It is convexly curved in between the 
branches of Ai, media and cubitus, so that the tips of the branches 
protrude not unlike the fingertips in a bat wing. A similar phenome- 
non is indicated in Moravohymen vitreus n.sp. of the related family 
Moravohymenidae. 
Moravohymenidae, new family 
Type genus: Moravohymen n.g. 
This family is based upon a fragment of a single wing (probably 
hind wing) , which seems to combine the features of Bardohymenidae 
with those of some megasecopterid families of Commentry, France 
(Carpenter, 1951). 
Wings broadest at the beginning of the apical third, tapering grad- 
ually proximally; Sc remote from the anterior margin and terminating 
freely in the subcostal area well before apex; Ri remote from Sc, 
not diverging apically from the posterior margin ; MA connected with 
R or with the very origin of Rs by a cross vein; stem of M either 
close or fused with R; Ai not parallel with the posterior margin, 
sending off few irregular branches; cross veins arranged into irregu- 
lar rows and partly sigmoidal; row of cross veins in ri-rs area; veins 
and wing margin provided by setae. 
The family Moravohymenidae has very gradually tapering wings 
with maximum width shifted to the distal third. MA is connected 
with R or Rs very much as in Bardohymenidae. The arrangement 
of the rest of the veins and sigmoidal cross veins reminds one more 
of some Upper Carboniferous Commentry families such as Mischop- 
teridae, Sphecopteridae and Corydaloididae. 
Genus included: Moravohymen n.g. (Lower Permian, Czecho- 
slovakia) . 
