Mitochondrial sequences used for the phylogenetic analysis.

Three new mitogenomes were generated for this study (bold). Also, four COI sequences generated for the holotype and three paratypes of Pectinereis strickrotti gen. nov., sp. nov. are listed. Note that the name Laeonereis cf. pandoensis is used here instead of Laeonereis culveri (Webster, 1879) since the specimen was collected in Brazil. The correct spelling for sequences deposited in GenBank as Tylorrhynchus heterochaetus is actually Tylorrhynchus heterochetus.