Table 1 Octopodiform (Cephalopoda: Octopodiformes) taxa included in the phylogenetic analysis and their respective GenBank codes for the mitochondrial 16S rRNA gene sequence. New species marked in bold font

Cirroteuthidae Keferstein, 1866

Cirroteuthis muelleri Eschricht, 1836

AF487284

Cirrothauma murrayi Chun, 1911

AF487282, AF487283

Stauroteuthis gilchristi (Robson, 1924)

AF487291-AF487295, AY545102

Stauroteuthis syrtensis Verrill, 1879

AF487285-AF487290, DQ280042

Stauroteuthis sp.

AF487296

Grimpoteuthidae O’Shea, 1999

Cryptoteuthis brevibracchiata Collins, 2004

MT435502

Grimpoteuthis discoveryi Collins, 2003

AF487305-AF487312

Grimpoteuthis imperator sp. nov.

MW575539

Grimpoteuthis sp.

AF110100

Luteuthis dentatus O’Shea, 1999

AJ315377

Cirroctopodidae Collins & Villanueva, 2006

Cirroctopus glacialis (Robson, 1930)

AF487304

Cirroctopus hochbergi O’Shea, 1999

AJ315376

Opisthoteuthidae Verrill, 1896

Opisthoteuthis californiana Berry, 1949

AJ315373

Opisthoteuthis calypso Villanueva et al., 2002

FJ403541, FJ403542

Opisthoteuthis chathamensis O’Shea, 1999

MT216982

Opisthoteuthis depressa Ijima & Ikeda, 1895

AB191117

Opisthoteuthis dongshaensis Lu, 2010

AJ315375

Opisthoteuthis hardyi Villanueva et al., 2002

AF487302, FJ785403, FJ785404

Opisthoteuthis massyae (Grimpe, 1920)

AF487297-AF487301, AF299265, AJ315371, AJ315372, AY545103

Opisthoteuthis mero O’Shea, 1999

MT216997, MT216998

Opisthoteuthis sp.

AF487303, AF487304, AJ252768, AJ414702, AY616970

Bathypolypodidae Robson, 1929

Bathypolypus arcticus (Prosch, 1849)

DQ280044

Eledonidae Rochebrune, 1884

Eledone moschata (Lamarck, 1798)

AJ252764

Enteroctopodidae Strugnell et al., 2014

Enteroctopus megalocyathus (Gould, 1852)

HM572165

Megaleledonidae Taki, 1961

Graneledone sp.

JN800402

Octopodidae d’Orbigny, 1840

Octopus bimaculatus Verrill, 1883

KT335834

Octopus bocki Adam, 1941

GQ900715

Vampyroteuthidae Thiele, 1915

Vampyroteuthis infernalis Chun, 1903

AY545101, AY686586, DQ280043, MG263918