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1 November 2015 The Lilliput effect in crinoids at the end of the Oceanic Anoxic Event 2: a Case study from Poland
Krzysztof R. Brom, Mariusz A. Salamon, Bruno Ferré, Tomasz Brachaniec, Krzysztof Szopa
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Abstract

The Cretaceous Period (145–66 Ma) consisted of several oceanic anoxic events (120–80 Ma), stimulated by global greenhouse effects. The Oceanic Anoxic Event 2 (OAE2) occurred worldwide from the late Cenomanian to the early-middle Turonian, causing a significant faunal turnover, mostly in marine biota, pushing some species to the brink of extinction. Some organisms also underwent morphological changes, including reduction in size. This anoxic event drove other changes—e.g., in habitats or strategy of life. We show that stalkless crinoids (comatulids) from the Turonian of Poland adapted to unfavorable environmental conditions by reducing their body size. Furthermore, at the moment when environmental factors became favorable again, these crinoids regained their regular (pre-event) size. This phenomenon likely illustrates the so-called dwarfing mode of the Lilliput effect.

© 2016, The Paleontological Society
Krzysztof R. Brom, Mariusz A. Salamon, Bruno Ferré, Tomasz Brachaniec, and Krzysztof Szopa "The Lilliput effect in crinoids at the end of the Oceanic Anoxic Event 2: a Case study from Poland," Journal of Paleontology 89(6), 1076-1081, (1 November 2015). https://doi.org/10.1017/jpa.2016.10
Accepted: 1 July 2015; Published: 1 November 2015
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