And who would have imagined that lookism flourishes even in the insect world, where scorpion flies choose mates according to how symmetrical their prospective partners'wings are?
12.
Direct benefits include nutritional resources to be used by females, donation of foods to mates, males offering prey to the female, seen in scorpion flies and dance flies.
13.
Fleas are related to the Diptera ( true flies ) and the Mecoptera ( scorpion flies ) as shown in the cladogram, based on a 2008 analysis of four loci ( 18S and 28S ribosomal DNA, cytochrome oxidase II, and elongation factor 1-alpha ) for 128 flea taxa from around the world.
