Figure 1

Genealogy of Aurelia lineages based on 16S rDNA (a) and ITS-1/5.8S rDNA (b) sequences. The total number of mtDNA haplotypes and ncDNA alleles studied per lineage are given and their geographic origins are listed in fig. 1a (^*the Mljet lakes samples group in mitochondrial LIM lineage but constitute a new lineage in the ncDNA tree). Branch lengths are drawn from Maximum Likelihood tree searches using substitution models (mtDNA: GTR+G, -ln Likelihood 1255.44, α = 0.15; ncDNA: HKY+G, TS/TV = 0.94, α = 0.27). Fig. 1a). Bootstrap values at branches derive from 1000 MP replicates, the dotted branches are only supported in MP analysis. Numbers in parentheses represent absolute numbers of apomorphic changes (Acctran optimisation, branch & bound search, 56 informative characters, CI = 0.86, gaps were excluded). Fig. 1b). Bootstrap values are from 100 ML/1000 MP replicates, heterozygous and hybrid individuals are marked by A and B alleles; Cyanea capillata is shown to have close relationship to the Aurelia LIM lineage (for further explanations see text).