SCORPIONS

There are three species of scorpions around Melbourne.
All are relatively harmless and reluctant to sting unless they feel threatened or surprised.
The photos are from the Museum of Victoria (Ken Walker and Alan Henderson). click here for a factsheet.

The wood scorpion lives on darker soils amid leaf litter in the bush.

The marbled scorpion prefers sandy soils and dunes.

The black rock scorpion Urodacus lives under wood or rocks.


OTHER ARACHNIDS

include SPIDERS (Aranaea), MITES and TICKS (Acari), PSEUDOSCORPIONS, CAVE SPIDERS (Amblipygids), SUN (camel) SPIDERS (Solifugae), WHIP SCORPIONS, HARVESTMEN (Opiliones), PALPIGRADI, TRIGOTARBIDA and RICINUCLEI.

The pseudoscorpion is not a true scorpion. It has no sting and no tail (x 60).

This tiny pseudoscorpion 3 mm found under bark on a tree in Wave Hill 2011.

The pseudoscorpion underside x 20.

The whip scorpion is another arachnid with no stinger.

The harvestman looks like a daddy long legs spider but has one body segment.

Click image for 12 arachnids and their phylogenic relationship.


Scorpions appear very early in the fossil record (400 million years ago) and began as marine creatures.
The pterygotid eurypterid was huge. A specimen almost 3 m long was found in Germany.
This is the ancestors of all the arachnids today. They were at the top of the food chain for 100 million years.
330 million years ago the terrifying water scorpion called Hibbertopterus was over 1.5m long and the first scorpions to come onto land.