Argentina 6 South America 6 interpopulation variation Abrotrichini 4 Chelemys 4 Cricetidae 4 Geoxus 4 Notiomys 4 Notiomys edwardsii 4 Patagonia 4 Pearsonomys 4 Rodentia 4 Strigiformes 4 endemic species 4 genetic variation 4 geographical distribution 4 geographical variation 4 rodent 4 skull 4 Altitude 2 Angiosperms 2 Biological Transport 2 Chile 2 Humidity 2 Nothofagus 2 Plant Leaves 2 Plant Stems 2 Rain 2 Soil 2 Species Specificity 2