Nest structure
All nests of P. sokolova were found in the mud, often with two nest entrances
elevated above the mud surface between the trees and close to the roots. Most of
the entrances were surrounded by a crater of particulate soil, which the ants excavated
from the nest. The extent of the nests can be more than 100 ´ 50 cm. The
galleries were most abundant in the upper 20 cm of the mud, but reached depths of
up to 45 cm. Figure 1 shows a section of the cast 40 cm from a tree. It is evident that
the majority of small chambers are situated around the highly developed root
18 Nielsen
Figure