Solifugae, Camel Spiders

In some species, there are very large central eyes. They look like simple eyes or ocelli, but they are in fact surprisingly sophisticated. They can recognise forms, and are used in hunting and avoiding enemies. These eyes are remarkable in their internal anatomy; there is a suggestion that they represent the last step in the integration of the aggregate of simple ocelli into a compound eye, and of further integration of a compound eye into a simple eye. In contrast, lateral eyes are absent in many species, and where they are present at all, they are only rudimentary.
Classification
The Solifugae are an order of their own. Although non-biologists are prone to confuse them with spiders, spiders form a completely distinct order, the Araneae. The order Solifugae comprises over 1000 described species in 153 genera assigned to the following 12 families: