Pteraspidomorphs (Vertebrata), the Old Red Sandstone, and the special case of the Brecon Beacons National Park, Wales, UK

Alain Blieck, David K Elliott

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Pteraspidomorphi are Ordovician to Devonian, jawless vertebrates devoid of paired fins that have developed a variety of phenotypes of mostly demersal aquatic animals of the neritic province. Some, however, were active swimmers in the water column or near to the surface. They show many convergences in adaptive variations with the other ossified agnathan vertebrates or ostracoderms, that is the osteostracans, galeaspids and pituriaspids. They are traditionally known as Old Red Sandstone (ORS) fish, and have been interpreted as fresh-water inhabitants. However, recent palaeoecological and sedimentological analyses have shown that they were near-shore, shallow-marine fishes in the Ordovician, that they occupied marine environments on the Silurian Baltic platform and a wide variety of environments in the Devonian, including those of the ORS (lagoonal, estuarine, deltaic, and open platform). Their peak of diversity was reached in the Early Devonian, and they all disappeared before the Frasnian-Famennian boundary biotic crisis. Within Earth sciences, they are used in biostratigraphy, palaeoecology, and palaeobiogeography. They are good tools for dating siliciclastic sedimentary series of the Silurian and Devonian, including the ORS, and they are good markers of the margins of Ordovician to Devonian palaeocontinents (Laurentia, Baltica, Siberia, Gondwana).

Original languageEnglish (US)
JournalProceedings of the Geologists Association
DOIs
StateAccepted/In press - Aug 25 2015

Fingerprint

Old Red Sandstone
national park
Ordovician
Silurian
vertebrate
Frasnian-Famennian boundary
paleobiogeography
Baltica
Laurentia
paleoecology
Earth science
fish
biostratigraphy
Gondwana
phenotype
marine environment
water column

Keywords

  • Brecon Beacons National Park
  • Devonian
  • Heterostraci
  • Old Red Sandstone
  • Pteraspidomorphs

ASJC Scopus subject areas

  • Geology
  • Palaeontology

Cite this

@article{ecd1302019704394bf6617bd8439cb03,
title = "Pteraspidomorphs (Vertebrata), the Old Red Sandstone, and the special case of the Brecon Beacons National Park, Wales, UK",
abstract = "Pteraspidomorphi are Ordovician to Devonian, jawless vertebrates devoid of paired fins that have developed a variety of phenotypes of mostly demersal aquatic animals of the neritic province. Some, however, were active swimmers in the water column or near to the surface. They show many convergences in adaptive variations with the other ossified agnathan vertebrates or ostracoderms, that is the osteostracans, galeaspids and pituriaspids. They are traditionally known as Old Red Sandstone (ORS) fish, and have been interpreted as fresh-water inhabitants. However, recent palaeoecological and sedimentological analyses have shown that they were near-shore, shallow-marine fishes in the Ordovician, that they occupied marine environments on the Silurian Baltic platform and a wide variety of environments in the Devonian, including those of the ORS (lagoonal, estuarine, deltaic, and open platform). Their peak of diversity was reached in the Early Devonian, and they all disappeared before the Frasnian-Famennian boundary biotic crisis. Within Earth sciences, they are used in biostratigraphy, palaeoecology, and palaeobiogeography. They are good tools for dating siliciclastic sedimentary series of the Silurian and Devonian, including the ORS, and they are good markers of the margins of Ordovician to Devonian palaeocontinents (Laurentia, Baltica, Siberia, Gondwana).",
keywords = "Brecon Beacons National Park, Devonian, Heterostraci, Old Red Sandstone, Pteraspidomorphs",
author = "Alain Blieck and Elliott, {David K}",
year = "2015",
month = "8",
day = "25",
doi = "10.1016/j.pgeola.2016.07.003",
language = "English (US)",
journal = "Proceedings of the Geologists Association",
issn = "0016-7878",
publisher = "Geological Society of London",

}

TY - JOUR

T1 - Pteraspidomorphs (Vertebrata), the Old Red Sandstone, and the special case of the Brecon Beacons National Park, Wales, UK

AU - Blieck, Alain

AU - Elliott, David K

PY - 2015/8/25

Y1 - 2015/8/25

N2 - Pteraspidomorphi are Ordovician to Devonian, jawless vertebrates devoid of paired fins that have developed a variety of phenotypes of mostly demersal aquatic animals of the neritic province. Some, however, were active swimmers in the water column or near to the surface. They show many convergences in adaptive variations with the other ossified agnathan vertebrates or ostracoderms, that is the osteostracans, galeaspids and pituriaspids. They are traditionally known as Old Red Sandstone (ORS) fish, and have been interpreted as fresh-water inhabitants. However, recent palaeoecological and sedimentological analyses have shown that they were near-shore, shallow-marine fishes in the Ordovician, that they occupied marine environments on the Silurian Baltic platform and a wide variety of environments in the Devonian, including those of the ORS (lagoonal, estuarine, deltaic, and open platform). Their peak of diversity was reached in the Early Devonian, and they all disappeared before the Frasnian-Famennian boundary biotic crisis. Within Earth sciences, they are used in biostratigraphy, palaeoecology, and palaeobiogeography. They are good tools for dating siliciclastic sedimentary series of the Silurian and Devonian, including the ORS, and they are good markers of the margins of Ordovician to Devonian palaeocontinents (Laurentia, Baltica, Siberia, Gondwana).

AB - Pteraspidomorphi are Ordovician to Devonian, jawless vertebrates devoid of paired fins that have developed a variety of phenotypes of mostly demersal aquatic animals of the neritic province. Some, however, were active swimmers in the water column or near to the surface. They show many convergences in adaptive variations with the other ossified agnathan vertebrates or ostracoderms, that is the osteostracans, galeaspids and pituriaspids. They are traditionally known as Old Red Sandstone (ORS) fish, and have been interpreted as fresh-water inhabitants. However, recent palaeoecological and sedimentological analyses have shown that they were near-shore, shallow-marine fishes in the Ordovician, that they occupied marine environments on the Silurian Baltic platform and a wide variety of environments in the Devonian, including those of the ORS (lagoonal, estuarine, deltaic, and open platform). Their peak of diversity was reached in the Early Devonian, and they all disappeared before the Frasnian-Famennian boundary biotic crisis. Within Earth sciences, they are used in biostratigraphy, palaeoecology, and palaeobiogeography. They are good tools for dating siliciclastic sedimentary series of the Silurian and Devonian, including the ORS, and they are good markers of the margins of Ordovician to Devonian palaeocontinents (Laurentia, Baltica, Siberia, Gondwana).

KW - Brecon Beacons National Park

KW - Devonian

KW - Heterostraci

KW - Old Red Sandstone

KW - Pteraspidomorphs

UR - http://www.scopus.com/inward/record.url?scp=84996805798&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84996805798&partnerID=8YFLogxK

U2 - 10.1016/j.pgeola.2016.07.003

DO - 10.1016/j.pgeola.2016.07.003

M3 - Article

JO - Proceedings of the Geologists Association

JF - Proceedings of the Geologists Association

SN - 0016-7878

ER -