Mexican species of the genus Heterandia, subgenus Pseudoxiphophorus (Pisces: poecilidae)

" The subgenus Pseudoxiphophorus is currently regarded as monotypic, with a single widespread species. Heterandia bimaculata inhabiting the Atlantic slope of Middle America. Actually the taxon includes two sharply distinct species in Mexico, the more primitive being H. jonesi; other species of Pseudoxiphophorus occur in Guatemala. The basis for recognizing subgenera of Heterandria is presented as well as a detailed comparison between H. bimaculata and H. jonesi, including illustrations of gonopodia. gonopodial suspensoria, and the whole fish. Herera11dria jonesi, which occurs at elevations up to 2,385 meters is close to the ancestral stock of the genus "