Parasite ID

[Goombarooli]

Hey first time posting here, have 2 videos of a very small invert which eats at the toes of my devloping tadpoles. It was caught with the soil sample along with some native daphnia, cyclops, and tadpoles from a friends land. I jsut cant find what it is, closest things to it are glochidia, but i really doubt that it is, for one it doesnt look the same, and 2 the area is consisting of lentic pond communities.

And help would be wonderful!


http://www.youtube.com/qazbana

Edit:
Might not be truly parasitic as they did not seem to btoher the tadpoles untill thier legs and feet developed. And have been reproducing readily. (from 1-2 to 40+)