Maximum likelihood (ML) tree for 1,381 bp inferred from combined partial mitochondrial COI, 16S rDNA, and nuclear 18S rDNA from six spionid polychaetes. Numbers above the branch indicate ML bootstrap values from 1000 replication. The sequence of Scolelepis (Scolelepis) daphoinos was used for outgroup rooting.

 
 
  Part of: Lee GH, Mei├čner K, Yoon SM, Min G-S (2021) New species of the genus Spio (Annelida, Spionidae) from the southern and western coasts of Korea. ZooKeys 1070: 151-164. https://doi.org/10.3897/zookeys.1070.73847