'Arm brains' (axial nerves) of Jurassic coleoids and the evolution of coleoid neuroanatomy.

Authors :: Klug C
Hoffmann R
Tischlinger H
Fuchs D
Pohle A
Rowe A
Rouget I
Kruta I
Source :: Swiss journal of palaeontology [Swiss J Palaeontol] 2023; Vol. 142 (1), pp. 22. Date of Electronic Publication: 2023 Sep 27.
Publication Year :: 2023
Abstract: Although patchy, the fossil record of coleoids bears a wealth of information on their soft part anatomy. Here, we describe remains of the axial nerve cord from both decabrachian ( Acanthoteuthis, Belemnotheutis, Chondroteuthis ) and octobrachian ( Plesioteuthis, Proteroctopus, Vampyronassa ) coleoids from the Jurassic. We discuss some hypotheses reflecting on possible evolutionary drivers behind the neuroanatomical differentiation of the coleoid arm crown. We also propose some hypotheses on potential links between habitat depth, mode of life and the evolution of the Coleoidea.<br />Supplementary Information: The online version contains supplementary material available at 10.1186/s13358-023-00285-3.<br />Competing Interests: Competing interestsWe have no competing interests.<br /> (© Akademie der Naturwissenschaften Schweiz (SCNAT) 2023.)

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