• Welcome to TONMO, the premier cephalopod interest community, and birthplace of #WorldOctopusDay and #CephalopodAwarenessDays. Founded in 2000, we are a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up. You can also become a Supporter for just $50/year to remove all ads and enjoy other perks. Follow us on Twitter for more cephy goodness.

Cephalopod Fossils

Photos and art pertaining to historic cephs

Media comments

Trachyteuthis

Trachyteuthis

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Fossil Nautilus

Fossil Nautilus

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Euhoplites

Euhoplites

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Plesioteuthis arms

Plesioteuthis arms

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Plesioteuthis

Plesioteuthis

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Heteromorph Ammonites

Heteromorph Ammonites

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Didymoceras

Didymoceras

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Paleoctopus?

Paleoctopus?

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Belemnite

Belemnite

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Lituites

Lituites

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Ceratite

Ceratite

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Ammonites

Ammonites

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Plesioteuthis

Plesioteuthis

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