Figure 6

Analyses of compositional heterogeneity in nuclear and mitochondrial datasets in the mitochondrial protein-coding genes. (A) Taxon-specific relative composition frequency variability (RCFV). (B) Absolute deviation from mean frequency for adenine (A), cytosine (C), guanine (G), and thymine (T) as well as combinations of adenine/thymine (AT) or guanine/cytosine (GC) and of pyrimidines (Y) or purines (R). Only one absolute value is provided for AT and GC or Y and R as only two character states are now present and any change in one state has the exact opposite negative or positive value in the other. (C) Skew values within the combinations adenine/thymine (A-T), guanine/cytosine (G-C), purines (A-G) and pyrimidines (C-T). Ampharetidae (grey squares), Alvinellidae (grey diamonds), Pectinariidae (open circles), Trichobranchidae and Terebellidae (both open triangles), mean values of outgroup taxa (black bar), nuclear (nuc), mitochondrial (mtD) .