Two subspecies are recognised, the nominotypicalP. m.subsp.macrostoma and P. m.subsp.negropontina, the latter being treated as a distinct species (Pseudamnicola negropontina) by some authors.[3][4]
Geographic distribution
P. macrostoma is endemic to Greece.[1][2] The species was originally described from a number of springs in the vicinity of Athens but was later also recorded from Evvia as well as several islands in the Aegean and Ionian seas.[1][4]