Pixie tadpoles

[John]

those are some type of ranid tadpoles, not Pyxicephalus.

You need to get your terms straight. Pyxicephalus are Ranids (family Ranidae). You are thinking of the genus Rana, not the family Ranidae.

Two huge physical features that these do not have, are the eyes on top and a noticeable stripe down the center of the back.

They only get those when they finish growing their back legs. Until then they are not marked in that way.