Sequence variation measured within mitochondrial (cox1) and nuclear (PEPCK) gene regions of Rhithrogena.

Characteristics of the reduced data sets used to parameterize the model of evolution (top) and the complete data sets used for GMYC analysis (bottom) are specified. Also indicated are the relative contributions of coding (PEPCKexons) and non-coding (PEPCKintron) regions. n = number of sequences, bp = size of aligned data set, K = number of haplotypes (cox1) or genotypes (PEPCK), S = number of` polymorphic sites, Si = number of parsimony-informative sites.