Maximum likelihood phylogenetic tree based on 16S sequences showing the relationships of Tremoctopus violaceus. Only bootstrap values above 90 are shown. Records from the Hawaiian Islands and South Korea–Japan were likely misidentified and correspond to T. gracilis.

 
 
  Part of: Jiménez-Badillo ML, Meiners-Mandujano C, Galindo-Cortes G, Morillo-Velarde PS, González-Gómez R, Barriga-Sosa IA, Pliego-Cárdenas R (2021) The first record of Tremoctopus violaceus sensu stricto Delle Chiaje,1830 in southwestern Gulf of Mexico gives a hint of the taxonomic status of Tremoctopus gracilis. ZooKeys 1012: 55-69. https://doi.org/10.3897/zookeys.1012.55718