User:Carterlillis/sandbox

Genetic studies
There has been much research done on the genetics of Pleistoannelids and annelids as a whole to determine the phylogeny of the clade, because many taxa do not shared ancestral characteristics. Genetic studies have led to the current phylogenetic tree, which seperates the clade into the two sister groups of Errantia and Sedentaria. Genetic data was also used in the placement of groups of Myzostomida, Nerilliade, and Aberranta within Pleistoannelida. These groups were previously thought to be anywhere from annelids to flatworms, but genetics studies have found strong evidence to place them solidly in Annelida, with the closest relations to groups in the clade Pleistoannelida. The most current research puts Myzostomida in Errantia, however the data is not strong enough to make this a certainty. Research places Nerillidae closest to Eunicida a (supported by certain morphology) and places Aberranta near Nerillidae or syllids and nereidids.