Answers are grounded in this paper and cite their sources.
Michael A. Mares, Michael R. Willig, Thomas E. Lacher, Jr., The Brazilian Caatinga in South American Zoogeography: Tropical Mammals in a Dry Region, Journal of Biogeography, Vol. 12, No. 1 (Jan., 1985), pp. 57-69
No takes yet. Share an insight, caveat, or question.
Mares et al. (1985) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: