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Diverse Middle Ordovician palaeoscolecidan worms from the Builth-Llandrindod inlier of central Wales

Joseph P Botting, Lucy A Muir, Peter Van Roy UGent, Dennis Bates and Christopher Upton (2012) PALAEONTOLOGY. 55(3). p.501-528
abstract
Palaeoscolecidan worms are rare, Early Palaeozoic fossils with uncertain affinities within the Ecdysozoa. They are locally abundant in the Cambrian and scattered in the Early Ordovician, but very sparse thereafter. Forty-four specimens have been collected from the Middle Ordovician of the Builth-Llandrindod Inlier of Mid Wales and include well-preserved material assigned to seven new genera, with four additional species in open nomenclature. An additional specimen from the Arenig Pontyfenni Formation of South Wales is also described in open nomenclature. The total demonstrates much greater palaeoscolecid diversity than hitherto suspected for this time. The specimens are preserved as cuticle fragments in shales and siltstones, often of submillimetre size but in many cases with excellent preservation. The level of detail preserved in some is equal to that found in Cambrian phosphatized faunas. The new approach to collecting, and the recognition that this material can yield taxonomically useful information, opens new avenues for palaeoscolecidan research in siliciclastic environments. The new taxa are the following: Radnorscolex bwlchi gen. et sp. nov., Aggerscolex murchisoni gen. et sp. nov., Bullascolex inserere gen. et sp. nov., Wernia eximia gen. et sp. nov., Ulexiscolex ormrodi gen. et sp. nov., Pluoscolex linearis gen. et sp. nov. and Loriciscolex cuspidus gen. et sp. nov. The high diversity, and the taxonomic separation from known groups described primarily from Cambrian carbonates, implies that palaeoscolecidans either diversified significantly during the Ordovician or were taxonomically segregated between carbonate and siliciclastic settings. Palaeobiological findings also include confirmation that some palaeoscolecid basal cuticles were solid and others reticulate, plates (and platelets) could form by lateral accretion, plates were in part primarily phosphatic and in part organic and that in at least some groups, platelet secretion occurred external to plate secretion.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Nematomorpha, cuticle, Powys, Priapulida, taphonomy, SOUTH-AUSTRALIA, CHINA, HADIMOPANELLA, DEPOSITS, FOSSILS, FAUNAS
journal title
PALAEONTOLOGY
Palaeontology
volume
55
issue
3
pages
501 - 528
Web of Science type
Article
Web of Science id
000303916100002
JCR category
PALEONTOLOGY
JCR impact factor
1.652 (2012)
JCR rank
14/50 (2012)
JCR quartile
2 (2012)
ISSN
0031-0239
DOI
10.1111/j.1475-4983.2012.01135.x
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1252181
handle
http://hdl.handle.net/1854/LU-1252181
date created
2011-06-05 22:22:28
date last changed
2012-10-19 11:58:35
@article{1252181,
  abstract     = {Palaeoscolecidan worms are rare, Early Palaeozoic fossils with uncertain affinities within the Ecdysozoa. They are locally abundant in the Cambrian and scattered in the Early Ordovician, but very sparse thereafter. Forty-four specimens have been collected from the Middle Ordovician of the Builth-Llandrindod Inlier of Mid Wales and include well-preserved material assigned to seven new genera, with four additional species in open nomenclature. An additional specimen from the Arenig Pontyfenni Formation of South Wales is also described in open nomenclature. The total demonstrates much greater palaeoscolecid diversity than hitherto suspected for this time. The specimens are preserved as cuticle fragments in shales and siltstones, often of submillimetre size but in many cases with excellent preservation. The level of detail preserved in some is equal to that found in Cambrian phosphatized faunas. The new approach to collecting, and the recognition that this material can yield taxonomically useful information, opens new avenues for palaeoscolecidan research in siliciclastic environments. The new taxa are the following: Radnorscolex bwlchi gen. et sp. nov., Aggerscolex murchisoni gen. et sp. nov., Bullascolex inserere gen. et sp. nov., Wernia eximia gen. et sp. nov., Ulexiscolex ormrodi gen. et sp. nov., Pluoscolex linearis gen. et sp. nov. and Loriciscolex cuspidus gen. et sp. nov. The high diversity, and the taxonomic separation from known groups described primarily from Cambrian carbonates, implies that palaeoscolecidans either diversified significantly during the Ordovician or were taxonomically segregated between carbonate and siliciclastic settings. Palaeobiological findings also include confirmation that some palaeoscolecid basal cuticles were solid and others reticulate, plates (and platelets) could form by lateral accretion, plates were in part primarily phosphatic and in part organic and that in at least some groups, platelet secretion occurred external to plate secretion.},
  author       = {Botting, Joseph P and Muir, Lucy A and Van Roy, Peter and Bates, Dennis and Upton, Christopher},
  issn         = {0031-0239},
  journal      = {PALAEONTOLOGY},
  keyword      = {Nematomorpha,cuticle,Powys,Priapulida,taphonomy,SOUTH-AUSTRALIA,CHINA,HADIMOPANELLA,DEPOSITS,FOSSILS,FAUNAS},
  language     = {eng},
  number       = {3},
  pages        = {501--528},
  title        = {Diverse Middle Ordovician palaeoscolecidan worms from the Builth-Llandrindod inlier of central Wales},
  url          = {http://dx.doi.org/10.1111/j.1475-4983.2012.01135.x},
  volume       = {55},
  year         = {2012},
}

Chicago
Botting, Joseph P, Lucy A Muir, Peter Van Roy, Dennis Bates, and Christopher Upton. 2012. “Diverse Middle Ordovician Palaeoscolecidan Worms from the Builth-Llandrindod Inlier of Central Wales.” Palaeontology 55 (3): 501–528.
APA
Botting, J. P., Muir, L. A., Van Roy, P., Bates, D., & Upton, C. (2012). Diverse Middle Ordovician palaeoscolecidan worms from the Builth-Llandrindod inlier of central Wales. PALAEONTOLOGY, 55(3), 501–528.
Vancouver
1.
Botting JP, Muir LA, Van Roy P, Bates D, Upton C. Diverse Middle Ordovician palaeoscolecidan worms from the Builth-Llandrindod inlier of central Wales. PALAEONTOLOGY. 2012;55(3):501–28.
MLA
Botting, Joseph P, Lucy A Muir, Peter Van Roy, et al. “Diverse Middle Ordovician Palaeoscolecidan Worms from the Builth-Llandrindod Inlier of Central Wales.” PALAEONTOLOGY 55.3 (2012): 501–528. Print.