Articles | Volume 21, issue 1
Foss. Rec., 21, 67–77, 2018
https://doi.org/10.5194/fr-21-67-2018
Foss. Rec., 21, 67–77, 2018
https://doi.org/10.5194/fr-21-67-2018

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 et al.

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Cited articles

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Bockwinkel, J., Becker, R. T., and Ebbighausen, V.: Upper Givetian ammonoids from Dar Kaoua (Tafilalt, SE Anti-Atlas, Morocco), Berliner paläobiologische Abhandlungen, 10, 61–128, 2009. 
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Buys, J.: Symbiosen van serpula's met ammonitien uit de Onder Lias van Dorset (Zuid-Engeland), Grundboor en Hamer, 1973, 62–67, 1973. 
Checa, A. G., Okamoto, T., and Keupp, H.: Abnormalities as natural experiments: a morphogenetic model for coiling regulation in planispiral ammonites, Paleobiology, 28, 127–138, 2002. 
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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.