The TIBA analysis, even for different data matrices, gave the same result suggesting thatBathyteuthis and Architeuthis was the sister group to the Watasenia and ommastrephid (Todarodes, Sthenoteuthis and Dosidicus) clade with jackknife support of more than 93% and that Semirossia has the sister-relationship to the oegopsids with jackknife support of more than 92% ( Fig. 2D). The TIBA analyses suggested that Sepia was the sister-group to all other decapodiforms.