Coleoidea
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Coleoidea or Dibranchiata is one of the two subclasses of cephalopod molluscs containing all the various taxa popularly thought of as "soft-bodied" or "shell-less". Unlike its sister groups, the shell
Cuttlefish komodo large
Octopus vulgaris 2
Psychroteuthis glacialis
Taningia sp.
Belemnitida
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Belemnitida is an extinct order of squid-like cephalopods that existed from the Late Triassic to Late Cretaceous. Unlike squid, belemnites had an internal skeleton that made up the cone. The parts are
Reconstruction of the belemnite Passaloteuthis
The Jurassic Youngibelus reconstructed with hectocotyli
Cephalopod embryonic shells. A) Ammonoidea (B) Sepiida (C) Belemnoidea (D) Spirulida (E) Orthocerida (F) Nautilida (G) Oncocerida (H) Pseudorthocerida (I) Oegopsina (J) Bactritida. IC indicates the initial chamber.