Table 4.
Testing of evolution models for spur length and tube width
| lnL | AICc | σ2 | α | Optima (mm) | No. trees supporting the model | |
|---|---|---|---|---|---|---|
| Spur length | ||||||
| BM | −83·98 | 172·43 | 230·45 | NA | NA | 0/10 |
| OU1* | −68·36 | 143·68 | 4891·41 | 374·84 | 8·98 (8·94–9·06) | 10/10 |
| OU2 | −68·10 | 145·86 | 2253·02 | 175·54 | 8·77 (8·72–8·87) | 0/10 |
| 9·61 (9·57–9·78) | ||||||
| Tube width | ||||||
| BM | −62·33 | 129·12 | 51·76 | NA | NA | 0/0 |
| OU1 | −51·12 | 109·20 | 6301·93 | 1584·62 | 3·99 (3·81–4·00) | 0/0 |
| OU2* | −32·27 | 74·20 | 726·20 | 669·87 | 4·67 (4·66–4·68) | 10/10 |
| 1·86 (1·83–1·86) |
Three models were tested: Brownian motion (BM), Ornstein–Uhlenbeck process with one optimum (OU1) and Ornstein–Uhlenbeck process with two optima (OU2). Values for the MCC species tree obtained in the *BEAST analysis are shown. Optimum values for the MCC species tree and minimum and maximum values obtained for ten randomly chosen species trees from the Bayesian posterior distribution (in brackets) are indicated. The last column summarizes the number of trees of the same sample where each model was significantly supported based on corrected AICc values. Abbreviations and symbols: *preferred model; lnL, log likelihood; AICc, corrected Akaike information criterion; σ, α, model parameters.