Multiple cryptic lineages and restricted gene flow in the decorator worm Diopatra cuprea

The decorator worm Diopatra cuprea Bosc, 1802 (Annelid; Polycheate; Onuphidae) is an ecosystem engineer within high-salinity estuaries of the southern and eastern United States. A previous study revealed five relatively deep mitochondrial lineages across its wide geographic distribution. Here, we explore geographic distribution and mitonuclear concordance of these mitochondrial lineages with single nucleotide polymorphisms (SNPs) genotyped using RADseq.