1975] 
Kukalova-Peck — Megasecoptera 
9 
This family differs from the Caulopteridae in the shorter Sc and 
in lacking the coalesced MP and CuA. Type genus: Arcioneura, 
new genus. 
Arcioneura, new genus 
Nymphal wings: very long and narrow. R 1 close to the costal 
margin in the distal half of the wing; Rs with about 2 long branches; 
MA with a series of short branches; MP forming a long branched 
fork. Cross veins almost regular. 
The generic name is derived from the Greek words arkios and 
neura (certain + veins) and is considered neuter plural. 
Type species: Arcioneura juveniles , n.sp. 
B 
Fig. 6. Hanidae, reconstruction of the specialized wing outline. A. Hana 
filia n.sp., fore and hind wing in natural position. Fore wing, length about 
84 mm, width 10.5 mm. B Hana l in eat a n.sp. Wing, length about 96 mm, 
width 8.3 mm. 
Arcioneura juveniles, n.sp. 
Figure 8 
This species is based upon a detached wing of a nymph, bent 
typically into oblique-lateral position in the basal third. The slight 
angle of the bend and the advanced sclerotization of veins and cross 
veins indicate that the nymph was close to the adult stage. 
Nymphal wing: length about 19 mm, width 2.6 mm. Sc termi- 
nating shortly beyond mid-wing; Sc much closer to R and R 1 than 
to the costal margin; Rs detaching from R 1 at the end of the basal 
third, the first branch of Rs starting shortly beyond mid-wing; MA 
sending off 4 branches, MP probably 3 times branched; CuP with 
1 branch; 1 A probably simple. 
Holotype: no. 29/1974 (almost complete wing, length 18.3 mm, 
width 2.6 mm; reverse). Paleontological Institute of Charles Uni- 
versity, Prague. 
