... (1959—Sciurinae), and Thorington et al. (2002—Pteromyini). Analysis was across 8 taxa: Callosciurinae, Ratufinae, Sciurillinae,Sciurinae: Pteromyini, Sciurinae: Sciurini, Xerinae: Marmotini,Xerinae: ... sciuridspecies are split into 8 groups: Callosciurinae, Marmotini,Protoxerini, Pteromyini, Ratufinae, Sciurillinae, Sciurini, and Xerini (Thorington and Hoffmann 2005). Phylogenetic in u-ences on reproduction ... length(Figs. 1E and 1F) are that lactation is short in Marmotini and Protoxerini and long in Pteromyini; for Sciurini (Sciurus) and Pteromyini, heavier species have longer lactation; flyingsquirrels...