Species;"Genbank accession number";"Data source" "Neoamphitrite undevigintipes sp. nov.";MN306311–MN306313;"Present study" "Neoamphitrite figulus";HQ023982–HQ023984;"Carr et al. 2011" "Neoamphitrite robusta";"HM473490, HM473492";"Carr et al. 2011" "Amphitrite cirrata";"HQ023919, HQ023920, HQ024485";"Carr et al. 2011" "MF121320, MF121320, MF121477";"Telfer and Dewaard 2017" "Nicolea zostericola";"HQ023618, HQ023619, HQ024406";"Carr et al. 2011" "Pista maculata";HQ023774–HQ023776;"Carr et al. 2011" "Pista wui";HM473586–HM473588;"Carr et al. 2011" "Loimia arborea";HM473449;"Carr et al. 2011" "Loimia medusa";AY040704;"Siddall et al. 2011" "Thelepus cincinnatus (outgroup)";HQ024486;"Carr et al. 2011"