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The anatomy, taphonomy, taxonomy and systematic affinity of Markuelia: Early Cambrian to Early Ordovician scalidophorans

The anatomy, taphonomy, taxonomy and systematic affinity of Markuelia: Early Cambrian to Early Ordovician scalidophorans
The anatomy, taphonomy, taxonomy and systematic affinity of Markuelia: Early Cambrian to Early Ordovician scalidophorans
Markuelia is a vermiform, annulated introvertan animal known as embryonic fossils from the Lower Cambrian to Lower Ordovician. Analysis of an expanded and revised dataset for Introverta shows that the precise position of Markuelia within this clade is dependent on the taxa included. As a result, Markuelia is assigned to the scalidophoran total group to reflect uncertainty as to whether it is a stem-scalidophoran or a stem-priapulid. The taxonomy of the genus is revised to provide an improved taxonomic framework for material assigned to Markuelia. Five species are recognized: M. secunda Val’kov, M. hunanensis Dong and Donoghue, M. lauriei Haug et al., M. spinulifera sp. nov. and M. waloszeki sp. nov. Finally, the preservation of Markuelia is evaluated in the light of both the taphonomy of the fossil embryos themselves and the experimental taphonomy of the priapulid Priapulus caudatus, which has been proposed as both a close relative and an anatomical analogue of Markuelia.
embryos, taphonomy, preservation, priapulida, scalidophora, introverta, taxonomy
0031-0239
1291-1314
Dong, Xi-Ping
355f45f5-9604-4ef9-92c9-547c21035839
Bengston, Stefan
fb58b087-9ea0-43e9-a3ab-14922981b502
Gostling, Neil J.
4840aa40-cb6c-4112-a0b9-694a869523fc
Cunningham, John A.
73877a7b-49fb-4a17-bb49-74b46c0a5fe6
Harvey, Thomas H.P.
b5db472a-c9fa-4309-851a-38a757c444be
Kouchinsky, Artem
81e02424-9b42-4e48-96e6-8426139e98b8
Val'Kov, Anatoly K.
5ed417a8-2585-4e68-b53f-693d619713ad
Repetski, John E.
9c80f70e-d6c6-4ead-a9c7-02c5d5e54723
Stamanoni, Marco
94da0d3e-9352-4bb7-8278-b21a4f1940b0
Marone, Federica
47f29ced-bf96-48cc-827a-5143796050d1
Donoghue, Philip C.J.
5f3fdb63-0685-40b8-aa87-d71353474db2
Dong, Xi-Ping
355f45f5-9604-4ef9-92c9-547c21035839
Bengston, Stefan
fb58b087-9ea0-43e9-a3ab-14922981b502
Gostling, Neil J.
4840aa40-cb6c-4112-a0b9-694a869523fc
Cunningham, John A.
73877a7b-49fb-4a17-bb49-74b46c0a5fe6
Harvey, Thomas H.P.
b5db472a-c9fa-4309-851a-38a757c444be
Kouchinsky, Artem
81e02424-9b42-4e48-96e6-8426139e98b8
Val'Kov, Anatoly K.
5ed417a8-2585-4e68-b53f-693d619713ad
Repetski, John E.
9c80f70e-d6c6-4ead-a9c7-02c5d5e54723
Stamanoni, Marco
94da0d3e-9352-4bb7-8278-b21a4f1940b0
Marone, Federica
47f29ced-bf96-48cc-827a-5143796050d1
Donoghue, Philip C.J.
5f3fdb63-0685-40b8-aa87-d71353474db2

Dong, Xi-Ping, Bengston, Stefan, Gostling, Neil J., Cunningham, John A., Harvey, Thomas H.P., Kouchinsky, Artem, Val'Kov, Anatoly K., Repetski, John E., Stamanoni, Marco, Marone, Federica and Donoghue, Philip C.J. (2010) The anatomy, taphonomy, taxonomy and systematic affinity of Markuelia: Early Cambrian to Early Ordovician scalidophorans. Palaeontology, 53 (6), 1291-1314. (doi:10.1111/j.1475-4983.2010.01006.x).

Record type: Article

Abstract

Markuelia is a vermiform, annulated introvertan animal known as embryonic fossils from the Lower Cambrian to Lower Ordovician. Analysis of an expanded and revised dataset for Introverta shows that the precise position of Markuelia within this clade is dependent on the taxa included. As a result, Markuelia is assigned to the scalidophoran total group to reflect uncertainty as to whether it is a stem-scalidophoran or a stem-priapulid. The taxonomy of the genus is revised to provide an improved taxonomic framework for material assigned to Markuelia. Five species are recognized: M. secunda Val’kov, M. hunanensis Dong and Donoghue, M. lauriei Haug et al., M. spinulifera sp. nov. and M. waloszeki sp. nov. Finally, the preservation of Markuelia is evaluated in the light of both the taphonomy of the fossil embryos themselves and the experimental taphonomy of the priapulid Priapulus caudatus, which has been proposed as both a close relative and an anatomical analogue of Markuelia.

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More information

Accepted/In Press date: 10 November 2009
e-pub ahead of print date: 16 November 2010
Published date: November 2010
Keywords: embryos, taphonomy, preservation, priapulida, scalidophora, introverta, taxonomy
Organisations: Centre for Biological Sciences

Identifiers

Local EPrints ID: 385758
URI: http://eprints.soton.ac.uk/id/eprint/385758
ISSN: 0031-0239
PURE UUID: e606e84f-ac92-45ef-852c-09a56a556fba
ORCID for Neil J. Gostling: ORCID iD orcid.org/0000-0002-5960-7769

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Date deposited: 22 Jan 2016 09:02
Last modified: 18 Aug 2020 01:41

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Contributors

Author: Xi-Ping Dong
Author: Stefan Bengston
Author: John A. Cunningham
Author: Thomas H.P. Harvey
Author: Artem Kouchinsky
Author: Anatoly K. Val'Kov
Author: John E. Repetski
Author: Marco Stamanoni
Author: Federica Marone
Author: Philip C.J. Donoghue

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