68 
Psyche 
[June 
PERIOD 
P 
E 
R 
M 
I 
A 
N 
U 
P 
P 
E 
R 
C 
A 
R 
B 
0 
N 
1 
F 
E 
R 
O 
U 
s 
STAGES 
Upper 
Middle 
Lower 
Stephanxan 
W 
E 
S 
T 
P 
H 
A 
L 
I 
A 
N 
C&D 
A&B 
Upper 
Namurian 
INSECT ORDERS 
Coleoptera 
Thysanoptera, Perlaria 
Protoperlaria , Protelytroptera, 
Ephemerida, Odonata, 
Corrodentia, Hemiptera, 
Mecoptera, Neuroptera 
Protohemiptera 
Megasecoptera, Caloneurodea 
Palaeodictyoptera , Blattaria 
Protodonata , Protorthoptera 
Figure 2. The First Occurrence of Insect Orders in the Permian and 
Carboniferous Periods. Names of exinct orders are italicized. 
