| Riassunto: | A panbiogeographic analysis was carried out to analyze the geographical distribution of Heterolinus Sharp and Homalolinus Sharp species, in order to contribute to the study of the biogeographical relationships of Mesoamerica. The three Heterolinus species are distributed mainly in northwestern South America, but H. basiniger Márquez is also recorded from Costa Rica. Homalolinus species are ranged mainly in Mexico and Central America, with only three species found in South America, one of them endemic to Ecuador. Mexico is the country with the highest number of Homalolinus species (16), followed by Costa Rica (12), Guatemala (8), and Panama (7). Based on a track analysis, six generalized tracks were recognized: Transmexican Volcanic Belt, Sierra Madre Oriental, Sierra Madre del Sur, northern mesoamerican, southern Mesoamerican, and northwestern South American. A node was found in the Sierra de Juárez, Oaxaca, based on the confluence of the four former generalized tracks. The barriers proposed by Halffter (1987), namely, the Isthmus of Tehuantepec, the lowlands of Nicaragua, and the Isthmus of Panama, were identified as probable vicariance events. The distributions of the studied species agree with the generalized tracks proposed by Morrone and Márquez (2001).
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