Undersampling Taxa Will Underestimate Molecular Divergence Dates: An Example from the South American Lizard Clade Liolaemini
Table 5
Mean divergence time estimates in MYA for higher-level Liolaemini lizard clades using subsampling strategy 1 of Table 1 and the root node calibration of Iguania and the Pristidactylus fossil calibration ([38], Table 7). Clade names correspond to names in Figure 1. SD is standard deviation as calculated in r8s1.8.
No. taxa deleted
Clade name
Liolaemini
Phymaturus
Liolaemus (genus)
Eulaemus (subgenus)*
Liolaemus (subgenus)*
None
97.6 (SD = 16.4)
34.7 (SD = 6.7)
41.7 (SD = 7.7)
31.3 (SD = 6.0)
34.1 (SD = 6.6)
3
76.6 (SD = 11.4)
27.2 (SD = 4.1)
31.4 (SD = 4.7)
23.9 (SD = 3.5)
25.6 (SD = 3.8)
5
76.5 (SD = 9.9)
27.1 (SD = 3.6)
31.4 (SD = 4.1)
23.8 (SD = 3.1)
25.6 (SD = 3.3)
15
74.4 (SD = 8.5)
26.4 (SD = 3.0)
30.5 (SD = 3.6)
23.0 (SD = 2.7)
24.8 (SD = 3.1)
30
75.3 (SD = 11.4)
26.6 (SD = 4.0)
30.8 (SD = 4.8)
23.2 (SD = 3.6)
24.9 (SD = 3.9)
50
75.2 (SD = 8.0)
26.6 (SD = 2.8)
30.6 (SD = 3.5)
22.0 (SD = 2.4)
24.7 (SD = 2.8)
70
72.2 (SD = 3.6)
25.3 (SD = 1.4)
29.5 (SD = 1.7)
19.2 (SD = 2.3)
23.5 (SD = 1.6)
80
71.3 (SD = 3.6)
24.8 (SD = 1.4)
28.3 (SD = 1.6)
N/A
N/A
82
74.4 (SD = 9.7)
25.7 (SD = 3.3)
25.9 (SD = 6.8)
N/A
N/A
Divergence times for subgenera Eulaemus and Liolaemus in subsampling sets 80 and 82 taxa deleted were not calculated because in some resampling data sets, less than two taxa were sampled from that particular clade and a divergence time could not be calculated.
