Figure 2.

Bayesian and maximum-likelihood consensus trees for concatenated datasets. Upper: housekeeping genes, actin, EF-1α, histone H3, α-tubulin, GAPDH, and 28s rRNA (5916 bp). Middle: nuclear ATP synthase subunit genes, alpha, beta, gamma, delta, b, c, d, OSCP (6894 bp). Lower: mitochondrial protein-coding genes, cox1–3, cytb, nad1–6 + 4 L, atp6, atp8, and RNA contig, 12S-tRNA-val-16S (13 381 bp). Branch support for Bayesian trees (left) are posterior probabilities and for ML trees (right) Shimodaira–Hasagawa approximate likelihood ratio test. In-group taxa (Mesenchytraeus) names are colour-coded by habitat: aquatic = aqua, blue = glacier, green = snow, and brown = terrestrial; outgroup enchytraeids are in black. (Online version in colour.)