The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric.

Xi-Ping Dong; PCJ Donoghue; J Cunningham; J Liu; H Cheng

doi:10.1111/j.1525-142X.2005.05050.x

The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric.

Xi-Ping Dong, PCJ Donoghue, J Cunningham, J Liu, H Cheng

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Translated title of the contribution	The anatomy, affinity, and phylogenetic significance of Markuelia
Original language	English
Pages (from-to)	468-482
Number of pages	15
Journal	Evolution and Development
Volume	7
Issue number	5
DOIs	https://doi.org/10.1111/j.1525-142X.2005.05050.x
Publication status	Published - Sept 2005

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Publisher: Blackwell

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Data from: The anatomy, affinity, and phylogenetic significance of Markuelia
Dong, X.-P. (Contributor), Donoghue, P. C. J. (Contributor), Cunningham, J. A. (Contributor), Liu, J.-B. (Creator) & Cheng, H. (Contributor), Dryad, 12 Oct 2012
DOI: 10.5061/dryad.40f6d, http://datadryad.org/stash/dataset/doi:10.5061/dryad.40f6d
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Dong, X.-P., Donoghue, PCJ., Cunningham, J., Liu, J., & Cheng, H. (2005). The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric. Evolution and Development, 7(5), 468-482. https://doi.org/10.1111/j.1525-142X.2005.05050.x

Dong, Xi-Ping ; Donoghue, PCJ ; Cunningham, J et al. / The anatomy, affinity, and phylogenetic significance of Markuelia : The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric. In: Evolution and Development. 2005 ; Vol. 7, No. 5. pp. 468-482.

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title = "The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric.",

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Dong, X-P, Donoghue, PCJ , Cunningham, J, Liu, J & Cheng, H 2005, 'The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric.', Evolution and Development, vol. 7, no. 5, pp. 468-482. https://doi.org/10.1111/j.1525-142X.2005.05050.x

The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric. / Dong, Xi-Ping; Donoghue, PCJ ; Cunningham, J et al.
In: Evolution and Development, Vol. 7, No. 5, 09.2005, p. 468-482.

Research output: Contribution to journal › Article (Academic Journal) › peer-review

TY - JOUR

T1 - The anatomy, affinity, and phylogenetic significance of Markuelia

T2 - The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric.

AU - Dong, Xi-Ping

AU - Donoghue, PCJ

AU - Cunningham, J

AU - Liu, J

AU - Cheng, H

N1 - Publisher: Blackwell

PY - 2005/9

Y1 - 2005/9

U2 - 10.1111/j.1525-142X.2005.05050.x

DO - 10.1111/j.1525-142X.2005.05050.x

M3 - Article (Academic Journal)

SN - 1520-541X

VL - 7

SP - 468

EP - 482

JO - Evolution and Development

JF - Evolution and Development

IS - 5

ER -

Dong XP, Donoghue PCJ , Cunningham J, Liu J, Cheng H. The anatomy, affinity, and phylogenetic significance of Markuelia: The fossil record provides a paucity of data on the development of extinct organisms, particularly for their embryology. The recovery of fossilized embryos heralds new insight into the evolution of development but advances are limited by an almost complete absence of phylogenetic constraint. Markuelia is an exception to this, known from cleavage and pre-hatchling stages as a vermiform and profusely annulated direct-developing bilaterian with terminal circumoral and posterior radial arrays of spines. Phylogenetic analyses have hitherto suggested assignment to stem-Scalidophora (phyla Kinorhyncha, Loricifera, Priapulida). We test this assumption with additional data and through the inclusion of additional taxa. The available evidence supports stem-Scalidophora affinity, leading to the conclusion that scalidophorans, cyclonerualians, and ecdysozoans are primitive direct developers, and the likelihood that scalidophorans are primitively metameric. Evolution and Development. 2005 Sept;7(5):468-482. doi: 10.1111/j.1525-142X.2005.05050.x

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Data from: The anatomy, affinity, and phylogenetic significance of Markuelia

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