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What can vertebrates tell us about segmentation?

Graham, Anthony, Butts, Thomas, Lumsden, Andrew and Kiecker, Clemens (2014) What can vertebrates tell us about segmentation? EvoDevo, 5 (1). p. 24. ISSN 2041-9139

Item Type: Article

Abstract

Segmentation is a feature of the body plans of a number of diverse animal groupings, including the annelids, arthropods and chordates. However, it has been unclear whether or not these different manifestations of segmentation are independently derived or have a common origin. Central to this issue is whether or not there are common developmental mechanisms that establish segmentation and the evolutionary origins of these processes. A fruitful way to address this issue is to consider how segmentation in vertebrates is directed. During vertebrate development three different segmental systems are established: the somites, the rhombomeres and the pharyngeal arches. In each an iteration of parts along the long axis is established. However, it is clear that the formation of the somites, rhombomeres or pharyngeal arches have little in common, and as such there is no single segmentation process. These different segmental systems also have distinct evolutionary histories, thus highlighting the fact that segmentation can and does evolve independently at multiple points. We conclude that the term segmentation indicates nothing more than a morphological description and that it implies no mechanistic similarity. Thus it is probable that segmentation has arisen repeatedly during animal evolution.

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More Information

Depositing User: Leah Maughan

Identifiers

Item ID: 14346
Identification Number: https://doi.org/10.1186/2041-9139-5-24
ISSN: 2041-9139
URI: http://sure.sunderland.ac.uk/id/eprint/14346
Official URL: http://dx.doi.org/10.1186/2041-9139-5-24

Users with ORCIDS

ORCID for Thomas Butts: ORCID iD orcid.org/0000-0002-1781-5287

Catalogue record

Date Deposited: 18 Jan 2022 09:48
Last Modified: 18 Jan 2022 09:48

Contributors

Author: Thomas Butts ORCID iD
Author: Anthony Graham
Author: Andrew Lumsden
Author: Clemens Kiecker

University Divisions

Faculty of Health Sciences and Wellbeing > School of Medicine

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