Discussion of Phylogenetic Relationships
The systematic positions of Grimpoteuthis and Luteuthis are uncertain. Voss and Pearcy (1990) place Grimpoteuthis in the family Opisthoteuthidae and O'Shea (1999) places it in its own family. O'Shea also places Luteuthis in its own family. Collins (in press) places Luteuthis in the Opisthoteuthidae but leaves Grimpoteuthis in its own family. We have adopted a conservative approach here pending a more thorough understanding of the family.
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