[1] This species was redescribed by Linton (1940) based on 3 specimens from the gills of the type-host and from the type-locality and was discussed superficially only.

[3] Linton noted that his specimens differed from those described by MacCallum (1915) by the anterior suckers being biloculate with a distinct costa in each.

[4] McMahon (1964) also redescribed this species based on 14 specimens from the gills of the type-host off Chesapeake Bay, United States and noted that his specimens differed from M. poronoti by body length and width, number and size of clamps, shape and number of testes, position of the genital atrium, and the presence of an armed ventral pore posterior to the genital atrium.

The haptor is symmetrical and long (about one-third of the whole length), and bears 120 clamps, arranged as two rows, one on each side.

The reproductive organs include an anterior oval genital atrium, armed with numerous short triangular spines, a medio-dorsal vagina, a single ovary, and 32 large testes which are posterior to the ovary.