The bees of Peponapis genus (Eucerini, Apidae) have a Neotropical distribution with the species diversity center located in Mexico (10 among 14 described species). They are the pollinators of Cucurbita plants, which present a similar geographical distribution and have some species that are important crops like squashes and pumpkins. Two Peponapis species occur in South America: P. melonis which is endemic to Ecuador and P. fervens, that has a wider distribution encompassing Brazilian Northeast (12?S) to Argentine (41?S). This latter species was chosen to compare the potential geographical area for both groups: plants and pollinators. The Cucurbita species that occur in the same area of P. fervens include four cultivated species (C. maxima var. maxima, C. moschata. C. pepo and C. ficifolia) and one wild species (C. maxima var. andreana). In order to obtain occurrence data, a survey was conducted using biodiversity databases, especially at GBIF and CRIA websites, and also at specialized literature. Thus, 114 occurrence points of P. fervens and 106 of Cucurbita species were obtained. They were used for modeling with openModeller v.1.0.6. software and GARP algorithm (with best subsets - new openModeller implementation). The environmental layers used for modeling were: maximum and minimum temperatures, precipitation and Hydro1K, with 9km2 of resolution. The models obtained for both data sets present accuracy above 99%. The result shows that the potential occurrence area of P. fervens coincides with the potential area of Cucurbita species, but the former has almost half the extension of the latter. P. fervens occurs in a potential geographic area that corresponds to 7.5% of total area analyzed and Cucurbita species occurs at 14.5%. The environmental variables average values obtained for P. fervens were: elevation 515m; precipitation 92.7mm/month; maximum temperature 24.5?C and minimum 12?C. The results for Cucurbita species were: elevation 936m; precipitation 89mm/mounth; maximum temperature 25.6?C and minimum 12.7?C. The environmental variables confirm that both genera occur predominately in dry areas with moderated temperatures and low precipitation.