Table 1 Results from alternative BEAST2 analyses. Estimated mean ages (in Ma) and associated 95% HPD intervals of select nodes: D + P = MRCA of Distichodus & Paradistichodus; D = MRCA of Distichodus species; D_ne + D_ro = MRCA of D. nefasch & D. rostratus; D_A = Distichodus subclade A; D_B = Distichodus subclade B. P₉₅ SMB = 95th percentile soft maximum bound (in Ma), as a proxy for the maximum node age constraint

12.42 [8.71, 16.55]

11.21 [7.92, 15.14]

9.82 [6.80, 13.26]

9.14 [6.24, 12.53]

3.47 [1.98, 5.24]

15.38 [9.76, 21.86]

13.76 [8.67, 19.65]

12.01 [7.48, 17.21]

11.22 [6.94, 16.22]

4.37 [2.35, 6.81]

19.44 [11.41, 29.34]

17.47 [10.31, 26.48]

15.30 [8.87, 23.25]

14.23 [8.16, 21.66]

5.41 [2.61, 8.78]

19.03 [18.24, 20.15]

17.29 [14.75, 19.51]

15.16 [12.64, 17.63]

14.13 [11.58, 16.77]

5.38 [3.44, 7.47]

24.01 [19.43, 30.15]

21.53 [15.95, 28.01]

18.81 [13.84, 24.81]

17.60 [12.55, 23.30]

6.89 [4.04, 10.10]

28.95 [20.81, 39.58]

26.09 [17.75, 36.45]

22.89 [15.19, 32.04]

21,32 [14.00, 30.08]

8.10 [4.40, 12.38]

21.50 [18.54, 25.08]

19.01 [18.23, 20.07]

16.61 [14.56, 18.39]

15.54 [13.26, 17.65]

6.09 [3.98, 8.30]

27.12 [20.64, 35.18]

24.10 [19.44, 30.20]

21.15 [16.39, 27.14]

19.69 [14.84, 25.69]

7.49 [4.46, 10.82]

32.08 [22.31, 44.49]

28.60 [20.79, 38.73]

25.09 [17.90, 34.80]

23.34 [16.12, 32.41]

8.83 [4.75, 13.34]

41.39 [30.72, 52.63]

36.97 [28.92, 46.28]

32.44 [24.74, 41.13]

30.08 [23.66, 37.06]

11.32 [8.03, 14.69]

50.21 [34.81, 67.85]

44.86 [31.82, 59.25]

39.28 [27.43, 52.69]

36.53 [26.67, 48.17]

13.88 [8.93, 19.16]

57.55 [37.68, 80.13]

51.46 [34.88, 70.56]

45.09 [29.98, 62.81]

41.98 [28.82, 57.31]

15.90 [9.53, 22.72]

66.14 [43.85, 90.50]

59.09 [40.85, 79.59]

51.71 [34.59, 69.69]

48.32 [34.01, 65.26]

18.96 [18.24, 19.94]

78.23 [50.07, 109.73]

69.92 [45.95, 96.62]

61.16 [39.54, 85.63]

57.24 [38.17, 79.02]

22.85 [19.30, 27.43]

87.68 [53.18, 125.70]

78.53 [49.63, 111.69]

68.74 [43.03, 99.17]

64.28 [40.60, 91.16]

25.88 [20.21, 32.85]