Three-dimensional kinematics of euchelicerate limbs uncover functional specialization in eurypterid appendages
| العنوان: | Three-dimensional kinematics of euchelicerate limbs uncover functional specialization in eurypterid appendages |
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| المؤلفون: | Russell D. C. Bicknell, Roland R. Melzer, Michel Schmidt |
| المصدر: | Biological Journal of the Linnean Society. 135:174-183 |
| بيانات النشر: | Oxford University Press (OUP), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, Appendage, 0303 health sciences, Functional specialization, Anatomy, Biology, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, 03 medical and health sciences, Three dimensional kinematics, 14. Life underwater, Eurypterid, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology |
| الوصف: | Sea scorpions (Euchelicerata: Eurypterida) explored extreme limits of the aquatic euchelicerate body plan, such that the group contains the largest known marine euarthropods. Inferences on eurypterid life modes, in particular walking and eating, are commonly made by comparing the group with horseshoe crabs (Euchelicerata: Xiphosura). However, no models have been presented to test these hypotheses. Here, we reconstruct prosomal appendages of two exceptionally well-preserved eurypterids, Eurypterus tetragonophthalmus and Pentecopterus decorahensis, and model the flexure and extension of these appendages kinematically in three dimensions (3D). We compare these models with 3D kinematic models of Limulus polyphemus prosomal appendages. This comparison highlights that the examined eurypterid prosomal appendages could not have moved prey items effectively to the gnathal edges and would therefore not have emulated the motion of an L. polyphemus walking leg. It seems that these eurypterid appendages were used primarily to walk or grab prey, and other appendages would have moved prey for mastication. Such 3D kinematic modelling highlights how eurypterid appendage morphologies placed substantial limits on their function, suggesting a high degree of specialization, especially when compared with horseshoe crabs. Such three-dimensional kinematic modelling of these extinct groups therefore presents an innovative approach to understanding the position of these animals within their respective palaeoecosystems. |
| تدمد: | 1095-8312 0024-4066 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::958fa9b31e002954e4291f3ffee9c4c6 https://doi.org/10.1093/biolinnean/blab108 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........958fa9b31e002954e4291f3ffee9c4c6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10958312 00244066 |
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