Evolution and Development at the Origin of a Phylum
Evolution and Development at the Origin of a Phylum
Quantifying morphological evolution is key to determining the patterns and processes underlying the origin of phyla. We constructed a hierarchical morphological character matrix to characterize the radiation and establishment of echinoderm body plans during the early Paleozoic. This showed that subphylum-level clades diverged gradually through the Cambrian, and the distinctiveness of the resulting body plans was amplified by the extinction of transitional forms and obscured by convergent evolution during the Ordovician. Higher-order characters that define these body plans were not fixed at the origin of the phylum, countering hypotheses regarding developmental processes governing the early evolution of animals. Instead, these burdened characters were flexible, enabling continued evolutionary innovation throughout the clades’ history.
1672 - 1679
Deline, B
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Thompson, JR
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Smith, NS
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Zamora, S
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Rahman, IA
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Sheffield, SL
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Ausich, WI
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Kammer, TW
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Sumrall, CD
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19 March 2020
Deline, B
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Thompson, JR
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Smith, NS
b77cc3b3-c11a-41d4-b04d-d2548fb3003e
Zamora, S
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Rahman, IA
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Sheffield, SL
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Ausich, WI
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Kammer, TW
cd381920-b794-4adc-95eb-bf880c61b81c
Sumrall, CD
98822fe8-5fbe-4289-931a-8cadfdf93282
Deline, B, Thompson, JR, Smith, NS, Zamora, S, Rahman, IA, Sheffield, SL, Ausich, WI, Kammer, TW and Sumrall, CD
(2020)
Evolution and Development at the Origin of a Phylum.
Current biology : CB, 30 (9), .
(doi:10.1016/j.cub.2020.02.054).
Abstract
Quantifying morphological evolution is key to determining the patterns and processes underlying the origin of phyla. We constructed a hierarchical morphological character matrix to characterize the radiation and establishment of echinoderm body plans during the early Paleozoic. This showed that subphylum-level clades diverged gradually through the Cambrian, and the distinctiveness of the resulting body plans was amplified by the extinction of transitional forms and obscured by convergent evolution during the Ordovician. Higher-order characters that define these body plans were not fixed at the origin of the phylum, countering hypotheses regarding developmental processes governing the early evolution of animals. Instead, these burdened characters were flexible, enabling continued evolutionary innovation throughout the clades’ history.
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e-pub ahead of print date: 19 March 2020
Published date: 19 March 2020
Identifiers
Local EPrints ID: 472589
URI: http://eprints.soton.ac.uk/id/eprint/472589
ISSN: 0960-9822
PURE UUID: 198c65ef-b24c-4a78-a176-9e67ac6add13
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Date deposited: 08 Dec 2022 17:45
Last modified: 17 Mar 2024 04:15
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Contributors
Author:
B Deline
Author:
JR Thompson
Author:
NS Smith
Author:
S Zamora
Author:
IA Rahman
Author:
SL Sheffield
Author:
WI Ausich
Author:
TW Kammer
Author:
CD Sumrall
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