Within the tribe Otothyrini, Pseudotothyris has a sister group relationship with Otothyris. In turn, Otothyropsis has a sister group relationship with the cladeOtothyris plus Pseudotothyris.[1] These three genera and Schizolecis share unique specializations of the cranium associated with an enlarged swimbladder capsule. The degree of development of the swimbladder capsule in these genera was not found in any other member of the Otothyrini.[1]
Species
There are currently 3 recognized species in this genus:[2]
^Eschmeyer, W. N., ed. (27 August 2014). "Species in the genus Pseudotothyris". Catalog of Fishes. California Academy of Sciences – Institute for Biodiversity Science and Sustainability. Retrieved 8 September 2014.
^Martins, F.O., Britski, H.A. & Langeani, F. (2014): Systematics of Pseudotothyris (Loricariidae: Hypoptopomatinae). Zoological Journal of the Linnean Society, 170 (4): 822–874.