Nautiloidea - Fossil History

Lesser Octopus (Eledone cirrhosa): Pembrokeshire, Wales, UK. Note the
funnel (siphon). Photo: Phil Newman (iNaturalist)

Part 1	Part 2	Part 3	Part 4
Introduction
Various Groups and Differences Nautiloidea Coleoidea Decapodiformes Octopodiformes	Behaviour and Ecology Nutrition and Digestion Colour Change and Camouflage Locomotion Intelligence Outside of Vertebrates? Social Behaviour	Large Squid Giant Squid Colossal Squid Humboldt Squid Giant Octopuses	Cephalopods and Humans
Body Parts and Morphology The Shell The Eyes The Tentacles Respiration and Circulation Nervous System	Reproduction and Development The Hectocotylus Fertilisation and Oviposition Brood Care and Hatching Development and Life Expectancy	Fossil History and Palaeontology Nautiloids Ammonites Belemnites Nautilus: A Living Fossil	Cephalopods in Myths and Legends
			Further Links and Literature

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Latest Change: 09.06.2026 (Robert Nordsieck).