Table 4 |
||||||
| Andes-Amazon transitions for echimyid rodents, as numbered in Figures4and5 | ||||||
| Transition | Branch | Time | Origin | Likelihood of stem ancestor’s range | ||
| Earliest (stem) | Latest (crown) | (and polarity) | ||||
| Figure4 | ||||||
| T1 | Isothrix | 13.3 (9.4, 17.5) | 5.2 (3.1, 7.4) | Uncertain (? → A, B) | P(A): 0.50, P(AB): 0.34, P(B): 0.13 | |
| T2a | Olallamys | [i] | 7.4 (4.8, 10.3) | Recent | Uncertain (? → B) | P(A): 0.58, P(B): 0.33 |
| [ii] | 8.3 (5.6, 11.3) | 7.4 (4.8, 10.3) | Uncertain (? → B, C) | P(A): 0.60, P(AB): 0.23, P(AC): 0.10 | ||
| [iii] | 12.5 (8.8, 16.4) | 8.3 (5.6, 11.3) | Amazon (A →?) | P(A): 0.86, P(AB): 0.10 | ||
| T3a | Dactylomys | 8.3 (5.6, 11.3) | 3.7 (2.1, 5.5) | Uncertain (? → A, B) | P(A): 0.71, P(B): 0.12, P(AB): 0.11 | |
| T4 | Mesomys | [i] | 1.6 (0.9, 2.3) | 1.2 (0.6, 1.9) | Uncertain (? → A, B) | P(A): 0.63, P(AB): 0.37 |
| [ii] | 2.8 (1.8, 4.0) | 1.6 (0.9, 2.3) | Amazon (A → AB) | P(A): 0.95 | ||
| Figure5a | ||||||
| T2b | Olallamys | 8.4 (7.1, 9.7) | Recent | Amazon (A → B) | P(A): 0.85, P(B): 0.11 | |
| T3b | Dactylomys | [i] | 8.4 (7.1, 9.7) | 4.2 (3.2, 5.1) | Uncertain (? → A, B) | P(AB): 0.56, P(B): 0.25, P(A): 0.16 |
| [ii] | 9.0 (7.7, 10.3) | 8.4 (7.1, 9.7) | Uncertain (? → B, AB) | P(A): 0.40, P(AB): 0.33, P(B): 0.23 | ||
| [iii] | 13.4 (11.8, 15.0) | 9.0 (7.7, 10.3) | Amazon (A → ?) | P(A): 0.78 | ||
| Figure5b | ||||||
| T2c | Olallamys | 13.4 (11.9, 15.0) | 9.0 (7.7, 10.3) | Amazon (A → B) | P(A): 0.82 → P(B): 0.77, P(A): 0.14 | |
| T3c | Dactylomys | [i] | 8.5 (7.3, 9.8) | 4.2 (3.2, 5.1) | Uncertain (? → A, B) | P(AB): 0.46, P(A): 0.34, P(B): 0.17 |
| [ii] | 9.0 (7.7, 10.3) | 8.5 (7.3, 9.8) | Uncertain (? → C, AB) | P(A): 0.49, P(B): 0.36, P(C): 0.12 | ||
The earliest and latest possible times of transition are listed as the stem group and crown group divergences, respectively. Transitions that are uncertain and may have occurred on more than one branch in the given phylogeny are noted as [i] stem ancestor, [ii] two branches back, and [iii] three branches back. Likelihoods represent the probability that a stem ancestor inhabited a given region immediately after speciation. Confidently reconstructed ancestral ranges (in bold) have a likelihood greater than 0.75; otherwise, ancestral ranges and transition polarities were considered uncertain. Regions are coded as A = Amazon, B = Andes, AB = Amazon + Andes, and AC = Amazon + Atlantic Forest.
Upham et al.
Upham et al. BMC Evolutionary Biology 2013 13:191 doi:10.1186/1471-2148-13-191
