Fossil Record
Fossil Record
Fossil Record
Articles | Volume 21, issue 1
Articles | Volume 21, issue 1
https://doi.org/10.5194/fr-21-67-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/fr-21-67-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 1
Research article
 | 
20 Mar 2018
Research article |  | 20 Mar 2018

Morphology of the Early Jurassic Arietitidae and the effects of syn vivo serpulid infestations

Michael Ramming, Dieter Korn, Carina Klein, and Christian Klug

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Latest update: 17 Jul 2025
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Short summary
Selected specimens from the Jurassic ammonoid Pararnioceras sp. revealed striking changes in the conch morphology due to a syn vivo growth through a parasitic serpulid. Changes in its ontogenetic development are compared with specimens without epizoans. The ecological interpretation of the morphometric data allows the conclusion that the host possessed the ability to counteract the parasitic conch abnormalities by adapting the housing growth, thus ensuring its survival.
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