Original: Derived features of its morphology ( '' apomorphies '' ) place it clearly within the bees , but it retains two unmodified ancestral traits ( '' plesiomorphies '' ) of the legs ( two mid-tibial spurs , and a slender hind basitarsus ) , indicative of its transitional status .
Simplified: Features of its morphology place it clearly within the bees , but it retains two unmodified ancestral traits of the legs which betray its origin .