Solifugae, Camel Spiders

The family Protosolpugidae is only known from one fossil species from the Pennsylvanian.
Ecology
Although Solifugae are considered to be endemic indicators of desert biomes, they occur widely in semi-desert and scrub. Some species also live in grassland or forest habitats. Solifugae generally inhabit warm and arid habitats, including virtually all warm deserts and scrublands in all continents excepting Antarctica and Australia.