3 1 6 
Psyche 
[December 
the apical margin; additional terminal branches leading to Rs may 
occur (specimen 1001, fore and hind wings). Rs: The level of 
origin of this varies; in extreme cases Rs diverges almost at the very 
base (specimen 1001, right hind wing) ; the number of branches of 
Rs branches varies in fore wing from 7 to 10, in the hind wing from 
7 to 9. Branches of Rs are simple with a single exception (specimen 
1002, 4th branch forked in hind wing). M : It is much alike in all 
specimens with one exception (1001, left hind wing has an additional 
twig on MP). Cu: CuP is always simple, CuA with 3-4 simple 
branches in fore wing and with 4-5 simple branches in the hind wing 
(specimen 1001 has additional twig in the hind wing). An: Anal 
veins vary from 6 to 9 in the fore wing and from 7 to 8 in the hind 
wing. Cross veins: The number is very variable; this feature in 
the Palaeodictyoptera is strongly affected by preservation. Supporting, 
strong cross veins near the base are highly variable in number and 
arrangement. Other supporting sclerotized structures at the base 
(broadened anal stem, cuticular thickening on Ai) are different in 
size but always present. Wing areas: Postcostal area is highly vari- 
able in size and shape, with 1-3 twigs. All other areas vary in size 
and width (e.g., sc-r area). Anal area varies both in length and 
width, especially in the hind wings. Shape of the wings: This is 
fairly constant (not considering the secondary deformations of the 
anterior margin) except for the narrow basal third in the fore wing 
of the male 1002 and specimen 1050. The posterior margin of the 
hind wing retains the characteristic undulation. Color pattern: This 
varies as shown in figures 3-15. 
In conclusion, we can say that all of the morphological features in 
the wings of Dunbaria f asciipennis are variable to some extent, in- 
cluding the level of origin of Rs and the size of the anal area, which 
may be considered as providing a specific character but not a narrowly 
defined one. Supporting structures, such as strong cross veins or occa- 
sional twigs of main veins, are variable, definitely on an individual 
level. The outline of the wings presents a rather reliable specific 
character but the effect of preservation should be thoroughly consid- 
ered. 
Within the 9 specimens of Dunbaria f asciipennis, two fore wings 
are markedly narrow in the basal third (specimen 1002 and 1050). 
Since specimen 1002 is a male, there is a possibility that this feature 
is a character of sexual dimorphism. This cannot be resolved until 
more specimens are found with well-preserved body parts combined 
with the wings. 
