The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation
Abstract New and archival collections from the Chelsey Drive Group of the Avalon terrane of Cape Breton Island, Nova Scotia, Canada, yield late Cambrian trilobites and agnostoid arthropods with full convexity that contrast with compacted, often deformed material from shale and slate typical of Avalo...
Published in: | Geological Magazine |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2016
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0016756816000571 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756816000571 |
id |
crcambridgeupr:10.1017/s0016756816000571 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0016756816000571 2024-10-13T14:06:27+00:00 The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation WESTROP, STEPHEN R. LANDING, ED 2016 http://dx.doi.org/10.1017/s0016756816000571 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756816000571 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 154, issue 5, page 1001-1021 ISSN 0016-7568 1469-5081 journal-article 2016 crcambridgeupr https://doi.org/10.1017/s0016756816000571 2024-09-18T04:04:04Z Abstract New and archival collections from the Chelsey Drive Group of the Avalon terrane of Cape Breton Island, Nova Scotia, Canada, yield late Cambrian trilobites and agnostoid arthropods with full convexity that contrast with compacted, often deformed material from shale and slate typical of Avalonian Britain. Four species of the agnostoid Lotagnostus form a stratigraphic succession in the upper Furongian ( Ctenopyge tumida – Parabolina lobata zones). Two species, L. ponepunctus (Matthew, 1901) and L. germanus (Matthew, 1901) are previously named; L. salteri and L. matthewi are new. Lotagnostus trisectus (Salter, 1864), the type species of the genus, is restricted to compacted material from its type area in Malvern, England. Lotagnostus americanus (Billings, 1860) has been proposed as a globally appropriate index for the base of ‘Stage 10’ of the Cambrian. All four species from Avalonian Canada are differentiated clearly from L. americanus in its type area in Laurentian North America (i.e., from debris flow blocks in Taconian Quebec). In our view, putative occurrences of L. americanus from other Cambrian continents record very different species. Lotagnostus americanus cannot be recognized worldwide, and other taxa should be sought to define the base of Stage 10, such as the conodont Eoconodontus notchhpeakensis . Article in Journal/Newspaper Breton Island Cambridge University Press Breton Island ENVELOPE(141.383,141.383,-66.800,-66.800) Canada Geological Magazine 154 5 1001 1021 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract New and archival collections from the Chelsey Drive Group of the Avalon terrane of Cape Breton Island, Nova Scotia, Canada, yield late Cambrian trilobites and agnostoid arthropods with full convexity that contrast with compacted, often deformed material from shale and slate typical of Avalonian Britain. Four species of the agnostoid Lotagnostus form a stratigraphic succession in the upper Furongian ( Ctenopyge tumida – Parabolina lobata zones). Two species, L. ponepunctus (Matthew, 1901) and L. germanus (Matthew, 1901) are previously named; L. salteri and L. matthewi are new. Lotagnostus trisectus (Salter, 1864), the type species of the genus, is restricted to compacted material from its type area in Malvern, England. Lotagnostus americanus (Billings, 1860) has been proposed as a globally appropriate index for the base of ‘Stage 10’ of the Cambrian. All four species from Avalonian Canada are differentiated clearly from L. americanus in its type area in Laurentian North America (i.e., from debris flow blocks in Taconian Quebec). In our view, putative occurrences of L. americanus from other Cambrian continents record very different species. Lotagnostus americanus cannot be recognized worldwide, and other taxa should be sought to define the base of Stage 10, such as the conodont Eoconodontus notchhpeakensis . |
format |
Article in Journal/Newspaper |
author |
WESTROP, STEPHEN R. LANDING, ED |
spellingShingle |
WESTROP, STEPHEN R. LANDING, ED The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation |
author_facet |
WESTROP, STEPHEN R. LANDING, ED |
author_sort |
WESTROP, STEPHEN R. |
title |
The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation |
title_short |
The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation |
title_full |
The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation |
title_fullStr |
The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation |
title_full_unstemmed |
The agnostoid arthropod Lotagnostus Whitehouse, 1936 (late Cambrian; Furongian) from Avalonian Cape Breton Island (Nova Scotia, Canada) and its significance for international correlation |
title_sort |
agnostoid arthropod lotagnostus whitehouse, 1936 (late cambrian; furongian) from avalonian cape breton island (nova scotia, canada) and its significance for international correlation |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/s0016756816000571 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756816000571 |
long_lat |
ENVELOPE(141.383,141.383,-66.800,-66.800) |
geographic |
Breton Island Canada |
geographic_facet |
Breton Island Canada |
genre |
Breton Island |
genre_facet |
Breton Island |
op_source |
Geological Magazine volume 154, issue 5, page 1001-1021 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756816000571 |
container_title |
Geological Magazine |
container_volume |
154 |
container_issue |
5 |
container_start_page |
1001 |
op_container_end_page |
1021 |
_version_ |
1812812608328171520 |