The Genus Alonella is a group of very small waterfleas. Fine features of the carapace and postabdomen are used to distinguish among species - necessitating use of a high-powered light microscope at a minimum.
Source: Genus Alonella
Large image, 1298 x 1289 pixels, 295 k
I am not certain yet which species this waterflea would be classified among, but I'm positive it's Zooplankton and fairly certain it falls within the genus Alonella.
This photo was created by fine-focusing at two separate depths and merging the photos. Nice seeing its wee little
More Photos and Video of Alonella