Which defining anatomical feature, present in scorpions, is explicitly absent in camel spiders?

Answer

A segmented tail ending in a telson (stinger)

Scorpions are immediately identifiable by their segmented tail ending in a telson, or stinger. Camel spiders (Solifugae) lack this tail structure entirely.

Which defining anatomical feature, present in scorpions, is explicitly absent in camel spiders?
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