More specifically, the earliest diverging genus was "Beiselia" (of the Bursereae subtribe Boswelliinae) in either North America, Mexico, or the Caribbean in the Paleocene. Similar results from other studies find that "Beiselia mexicana", a native of Mexico, is basal to the remaining Burseraceae. These results may indicate that the family originated in Mexico. The next divergence was in the Early Eocene when the Burserinae (i.e. "Commiphora") diverged and emigrated from North America into Africa, Madagascar, and India. "Commiphora" dispersed throughout Africa during the Middle Eocene (about 44 Mya) and from Africa to Madagascar during the Oligocene (about 30 Mya) via the Mozambique Channel Land Bridge; the spread to India was more recent (about 5 Mya). The Canarieae and Boswelliinae (subtribes of Bursereae) dispersed from western Laurasia and spread eastward during the Eocene; fossils of Canarium, for example, from the Czech Republic date to the Late Oligocene (23 Mya). Finally, the Protieae originated in North America like the rest of the family, then migrated to Africa and Asia through the Tethys seaway in the Late Eocene (about 37 Mya), but then made its way back to South America via long-distance dispersal. By the late Oligocene (about 23Mya), all three Burseraceae tribes were extant and dispersed throughout the Northern Hemisphere.