original description
Milne, W. (1886). On the defectiveness of the eye-spot as a means of generic distinction in the Philodinaea, with a description of two other Rotifera. Proceedings of the Philosophical Society of Glasgow, 17, 134-145, pl.1-2 [details] Available for editors 
additional source
Donner, J. (1965). Ordnung Bdelloidea (Rotatoria, Rädertiere). Bestimmungsbücher zur Bodenfauna Europas. Berlin. Akademie-Verlag, 297 [details] Available for editors 
From editor or global species database