Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada
Three crinoids are described from the Table Point Formation, Table Head Group (Whiterockian-Llanvirn) from Aguathuna quarry, Port au Port Peninsula, western Newfoundland, including Trichinocrinus terranovicus Moore and Laudon, Isotomocrinus apheles n.sp., and Brechmocrinus eos n.gen. and n.sp. Trich...
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1998
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Online Access: | http://dx.doi.org/10.1139/e97-092 http://www.nrcresearchpress.com/doi/pdf/10.1139/e97-092 |
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crcansciencepubl:10.1139/e97-092 2023-12-17T10:43:36+01:00 Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada Ausich, William I Bolton, Thomas E Cumming, Leslie M 1998 http://dx.doi.org/10.1139/e97-092 http://www.nrcresearchpress.com/doi/pdf/10.1139/e97-092 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 35, issue 2, page 121-130 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1998 crcansciencepubl https://doi.org/10.1139/e97-092 2023-11-19T13:38:18Z Three crinoids are described from the Table Point Formation, Table Head Group (Whiterockian-Llanvirn) from Aguathuna quarry, Port au Port Peninsula, western Newfoundland, including Trichinocrinus terranovicus Moore and Laudon, Isotomocrinus apheles n.sp., and Brechmocrinus eos n.gen. and n.sp. Trichinocrinus terranovicus is one of the oldest camerate crinoids known. It was previously described from a single specimen, and the numerous additional specimens confirm that this crinoid had few fixed calyx plates, demonstrate that the small "pinnulets" are spines, and reveal that this crinoid had a very unusual posterior. The posterior interradius may indicate that all crinoids had homologous plating in the posterior interray rather than the camerate posterior interray being distinct from other crinoids. Isotomocrinus apheles n.sp. is the oldest species of this Ordovician genus, and Brechmocrinus eos n.gen. and n.sp. is the third known Arenig to Llanvirn cladid with a compound radianal. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canada Table Head ENVELOPE(-55.698,-55.698,52.083,52.083) Laudon ENVELOPE(-64.038,-64.038,-74.214,-74.214) Canadian Journal of Earth Sciences 35 2 121 130 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Ausich, William I Bolton, Thomas E Cumming, Leslie M Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Three crinoids are described from the Table Point Formation, Table Head Group (Whiterockian-Llanvirn) from Aguathuna quarry, Port au Port Peninsula, western Newfoundland, including Trichinocrinus terranovicus Moore and Laudon, Isotomocrinus apheles n.sp., and Brechmocrinus eos n.gen. and n.sp. Trichinocrinus terranovicus is one of the oldest camerate crinoids known. It was previously described from a single specimen, and the numerous additional specimens confirm that this crinoid had few fixed calyx plates, demonstrate that the small "pinnulets" are spines, and reveal that this crinoid had a very unusual posterior. The posterior interradius may indicate that all crinoids had homologous plating in the posterior interray rather than the camerate posterior interray being distinct from other crinoids. Isotomocrinus apheles n.sp. is the oldest species of this Ordovician genus, and Brechmocrinus eos n.gen. and n.sp. is the third known Arenig to Llanvirn cladid with a compound radianal. |
format |
Article in Journal/Newspaper |
author |
Ausich, William I Bolton, Thomas E Cumming, Leslie M |
author_facet |
Ausich, William I Bolton, Thomas E Cumming, Leslie M |
author_sort |
Ausich, William I |
title |
Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada |
title_short |
Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada |
title_full |
Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada |
title_fullStr |
Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada |
title_full_unstemmed |
Whiterockian (Ordovician) crinoid fauna from the Table Head Group, western Newfoundland, Canada |
title_sort |
whiterockian (ordovician) crinoid fauna from the table head group, western newfoundland, canada |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/e97-092 http://www.nrcresearchpress.com/doi/pdf/10.1139/e97-092 |
long_lat |
ENVELOPE(-55.698,-55.698,52.083,52.083) ENVELOPE(-64.038,-64.038,-74.214,-74.214) |
geographic |
Canada Table Head Laudon |
geographic_facet |
Canada Table Head Laudon |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 35, issue 2, page 121-130 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e97-092 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
35 |
container_issue |
2 |
container_start_page |
121 |
op_container_end_page |
130 |
_version_ |
1785558746209976320 |