Hi Finley,
Do you have more images of the critter?
Unfortunately it is hardly possible to id a bdelloid rotifer based on a single image. Genus Philodina is possible, but also the genera Mniobia and Macrotrachela. Does the specimen have eyespots? It´s not clear how many major teeth are in the trophi. (There seem to be 4 in each of the unci, which would exclude a lot of Philodina species, but none would have such long and parallel aligned spurs). A more detailed image of the foot would show if and how many toes the critter has which would allow to distinguish between Mniobia, Macrotrachela and Philodina.
Best Michael Plewka
