According to Hargis (1959), P. mexicanum is a valid species but “almost congeneric” with M. sinaloense. The independence of both genera was established by Suriano (1975). Recently, the amended diagnosis of the genus Macrovalvitrema Caballero & Bravo-Hollis, 1955 was published by Hernández-Vale et al. (2016), who recognized their independence of Pterinotrematoides
Caballero & Bravo-Hollis, 1955.
Mendoza-Garfias B., García-Prieto L.; Pérez-Ponce De León G. (2017). Checklist of the Monogenea (Platyhelminthes) parasitic in Mexican aquatic vertebrates. <em>Zoosystema.</em> 39 (4): 501-598.