Fig. 1

Morphological variability and environment of Thylamys elegans. a Adult specimen and landscape from the Loa river Mouth, Loa lineage (Clade A); b Adult specimen corresponding to T. e. coquimbensis from Paihuano and ravine from Llanos de Challe (Clade B); c Adult specimen and landscape from Los Molles corresponding to the Aconcagua lineage (Clade C); d Adult specimen corresponding to T. e. elegans from Punta Curaumilla and landscape from Las Docas (Clade D; e) Adult specimen from Lipimávida and landscape from Pupuya, corresponding to the South 1 lineage (Clade E); f Adult specimen (not sequenced) and landscape from Nahuelbuta Coastal range, probably corresponding to the South 2 lineage (Clade F). Northern clade encompasses the Loa, T. e. coquimbensis, Aconcagua and T. e. elegans lineages and southern clade encompasses the South 1 and South 2 lineages