Aufsatz
A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora)
Abstract
An antagonistic hemolymph-muscular system is essential for soft-bodied invertebrates. Many ecdysozoans (molting animals) possess neither a heart nor a vascular or circulatory system, whereas most arthropods exhibit a well-developed circulatory system. How did this system evolve and how was it subsequently modified in panarthropod lineages? As the closest relatives of arthropods and tardigrades, onychophorans (velvet worms) represent a key group for addressing this question. We therefore analyzed the entire circulatory system of the peripatopsid Euperipatoides rowelli and discovered a surprisingly elaborate organization. Our findings suggest that the last common ancestor of Onychophora and Arthropoda most likely possessed an open vascular system, a posteriorly closed heart with segmental ostia, a pericardial sinus filled with nephrocytes and an impermeable pericardial septum, whereas the evolutionary origin of plical and pericardial channels is unclear. Our study further revealed an intermittent heartbeat—regular breaks of rhythmic, peristaltic contractions of the heart—in velvet worms, which might stimulate similar investigations in arthropods.
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Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-202311108990,
author={Jahn, Henry and Hammel, Jörg Ulrich and Göpel, Torben and Wirkner, Christian S. and Mayer, Georg},
title={A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora)},
journal={Communications Biology},
year={2023}
}
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<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2023-11-10T08:16:00Z 2023-11-10T08:16:00Z 2023-04-28 doi:10.17170/kobra-202311108990 http://hdl.handle.net/123456789/15169 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 570 590 A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora) Aufsatz An antagonistic hemolymph-muscular system is essential for soft-bodied invertebrates. Many ecdysozoans (molting animals) possess neither a heart nor a vascular or circulatory system, whereas most arthropods exhibit a well-developed circulatory system. How did this system evolve and how was it subsequently modified in panarthropod lineages? As the closest relatives of arthropods and tardigrades, onychophorans (velvet worms) represent a key group for addressing this question. We therefore analyzed the entire circulatory system of the peripatopsid Euperipatoides rowelli and discovered a surprisingly elaborate organization. Our findings suggest that the last common ancestor of Onychophora and Arthropoda most likely possessed an open vascular system, a posteriorly closed heart with segmental ostia, a pericardial sinus filled with nephrocytes and an impermeable pericardial septum, whereas the evolutionary origin of plical and pericardial channels is unclear. Our study further revealed an intermittent heartbeat—regular breaks of rhythmic, peristaltic contractions of the heart—in velvet worms, which might stimulate similar investigations in arthropods. open access Jahn, Henry Hammel, Jörg Ulrich Göpel, Torben Wirkner, Christian S. Mayer, Georg doi:10.1038/s42003-023-04797-z Stummelfüßer Kardiovaskuläres System Herzfrequenz publishedVersion eissn:2399-2023 Communications Biology Volume 6 false Article number: 468 </resource>
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