T.E.R:R.A.I.N - Taranaki Educational Resource: Research, Analysis and Information Network


Crab spider (Sidymella spp) Species 2

Kingdom Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Superfamily: Thomisoidea
Family: Thomisidae
Genus: Sidymella
Species: Sidymella unknown

Crab spiders are not active hunters. They make more use of the camouflage techniques than other spiders. They do not make a web but catch their prey with their front legs.
The color of the spider is adapted to the hunting terrain they use and can be extravagant. They remain unmoved until the prey arrives and catches it. With a poisonous bite (not dangerous to humans) they kill their prey and suck it dry. They can be found on flowers or leaves of plants. Often the crab spider remains for days, even weeks at the same spot. The front two legs, that are often larger and stronger than the other six, are held sideways, ready to catch the prey immediately. Because they sit on easily spotted places they are also easy to catch by the predators. When they spot a possible enemy they move quickly at the other site of the object they are on. 
Their eyesight is excellent . They have normally two big front eyes. Crab spiders are easy recognizable if you tease them. They widen their legs and move side ways like a crab. The females usually stand guard with their egg sacs. The egg sacs are fastened to the vegetation and are usually flat.

This crab spider is unusual because of the appendages  with spurs on under each foreleg which is not normal in crab spiders


This spider had a 8mm body. Photographed on a a roof spouting bracket.





Te Henui