Schematic representation of mtDNA N subclades spread from a possible Southern Asian urheimat. The subdivisions of macro-haplogroup R are not represented. Dots indicate unnamed shared upstream nodes between two or more clades. Only macro-regional (South, West, East Eurasia and Australia) distribution is shown (American and European offshots are disregarded here for the sake of simplicty).
Based on Ian Logan's mtDNA page.
Notes: Haplogroup I is a subclade of N1. The only N(xR) clades found in Native America are A and (at low levels) X.