GUIDE TO COMMON SPIDERS
IN BORNEO ISLAND
ESPLANATE 23-11-2014 SUN 12:41PM
When alarmed, the spider erects its two long spinnerets and darts to
the opposite side of the tree with a movement so swift that all one
can see is an apparent blurring of a part of the bark. Quick and
difficult to capture as they disappear into the narrowest of
The oval abdomen is wider posteriorly with the posterior lateral spinnerets extending out parallel to each other. The inner edge of these spinnerets is lined with silk-producing tubules (spine-like spigots) as opposed to the distally placed spigots of most spiders.
The Hersiliidae mostly live on tree trunks with the long legs stretched out radially on tree bark or lichen-covered crags.
The Hersiliidae, commonly called long-spin or two-tailed spiders, is a smaller family comprising 7genera and 148 species worldwide of which 66species of 4 genera are known from the Oriental Region (Baehr and Baehr 1993, Platnick 2005).
The above female Hersilia deelemanae has two legs half broken off (see above image)
|They are cryptically colored in variegated
shades of cream, orange, green, brown, grey and black.
|The head region is elevated
above the rest of the cephalothorax (a fused head and thorax).
As viewed from above, the carapace of cephalothorax is oval with the 8 eyes situated in two recurved rows, on a raised hump or tubercle.
The anterior median eyes are largest.
|It can be easily identified by its long
spinnerets. This genus of tree trunk spiders
known as Two-tailed spiders due to their greatly enlarged
Their elongated posterior lateral spinnerets are disproportionately long and pointed like a pair of tail, hence the name "Two-Tailed Spiders".
This elongated posterior lateral spinnerets which can be as long as the abdomen.
This female's elongated spinnerets is 5mm while its body length is only 6.5mm
|ESPLANATE 23-11-2014 SUN 1:03PM
Hersilia deelemanae of Sabah living almost exclusively on big tree trunks. Only on large tree of smooth tree surface.
No account of spotting this spider on oil palm tree yet. Oil palm trees were planted in large scale in Sabah at the cost of deforestation.
The spider color closely matches that of the tree trunks in which it lives. It feeds on moths, ants, and other smaller spiders.
|Body length not including tails is 6.5mm.
The two tails itself are 5mm long.
body is compressed and legs are exceedingly long (except the third
This poor creature has two legs half broken, one on each side (see image left)