Argonauta itoigawai is an extinct species of octopus. It was described in 1983 based on fossil material from the Pliocene Senhata Formation in Bōsō Peninsula, Japan.Tomida, S. (1983). Two new fossil Argonauta and firstly discovered Aturia coxi Miller from the late Tertiary of Boso Peninsula, Japan. Muzunami-shi Fossil Museum Bulletin 10: 107-116.
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