Molecular investigations of deep-level relationships within and among the animal phyla have been hampered by a lack of slowly evolving genes that are amenable to study by molecular systematists. To provide new data for use in deep-level metazoan phylogenetic studies, primers were developed to amplify a 1.3-kb region of the alpha subunit of the nuclear-encoded sodium-potassium ATPase gene from 3...

Annelida is a ubiquitous, common and diverse group of organisms, found in terrestrial, fresh waters marine environments. Despite the large efforts put into resolving evolutionary relationships these other Lophotrochozoa, delineation basal nodes within group, are still unanswered. holds an enormous diversity forms biological strategies alongside number species, following Arthropoda, Mollusca, Ve...