John J. Schenk, Kevin C. Rowe and Scott J. Steppan
Ecological Opportunity and Incumbency in the Diversification of Repeated Continental Colonizations by Muroid Rodents
Systematic Biology 2013
doi: 10.1093/sysbio/syt050

… Consistent with the fossil record, we identified Eurasia as the most likely origin of the group and reconstructed five to seven colonizations of Africa, five of North America, four of Southeast Asia, two of South America, two of Sahul, one of Madagascar, and eight to ten recolonizations of Eurasia …