TABLE 2 

Time to the most recent common ancestor (tMRCA) for the main clades

CladeMedian estimated tMRCAaTajima’s D
C11937 (1873−1973)−2.32
C21945 (1890–1978)−2.63
E11950 (1899–1980)−2.42
F1951 (1901–1981)b−1.90
F (NAE)1989 (1976–1999)−0.98
F (SAE)1994 (1983–2001)−0.85
USA300/USA500 (C–F)1892 (1820–1952)−2.33
  • a In parentheses are the 95% highest posterior density intervals.

  • b See reference 11 for details.