Had no luck so made one based on Wiki. Started at Crustacea and worked my way down.
https://en.wikipedia.org/wiki/Crustacean
As in all these things, corrections are welcome ...
The Families in green are the ones that appear in the initial Cladocera page of the Center for Freshwater Biology Key:
http://cfb.unh.edu/cfbkey/html/choices/ ... 11/11.html
Wiki only included Genus for the Daphniidae family so the chart has some way to go yet, but one can see that calling all Water Fleas ... Daphnia, is a bit hit and miss.
![Image](http://i1368.photobucket.com/albums/ag171/mapologo/Screen%20Shot%202017-05-11%20at%2011.56.04_zpsiarsr7w9.png)