Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery
Cladistic analysis of some Hirnantian (latest Ordovician) and Rhuddanian-Aeronian (early Silurian) biserial graptolites and basal monograptids has been undertaken in order to test hypotheses of the relationships among the Neograptina ('normalograptids' and their descendents) and to provide...
Published in: | Proceedings of the Yorkshire Geological Society |
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GEOLOGICAL SOC PUBL HOUSE
2011
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Online Access: | http://ir.nigpas.ac.cn/handle/332004/19885 https://doi.org/10.1144/pygs.58.4.301 |
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/19885 2023-05-15T15:07:53+02:00 Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery Melchin, M. J. Mitchell, C. E. Naczk-Cameron, A. Fan, J. X. Loxton, J. 2011-11-01 http://ir.nigpas.ac.cn/handle/332004/19885 https://doi.org/10.1144/pygs.58.4.301 英语 eng GEOLOGICAL SOC PUBL HOUSE PROCEEDINGS OF THE YORKSHIRE GEOLOGICAL SOCIETY http://ir.nigpas.ac.cn/handle/332004/19885 doi:10.1144/pygs.58.4.301 CANADIAN-ARCTIC-ISLANDS CAPE-PHILLIPS FORMATION SOUTHERN URALS GRAPTOLITES ORDOVICIAN LLANDOVERY EVOLUTION CLASSIFICATION MORPHOLOGY BOUNDARY Geology 期刊论文 2011 ftchinacscnigpas https://doi.org/10.1144/pygs.58.4.301 2019-08-14T12:44:29Z Cladistic analysis of some Hirnantian (latest Ordovician) and Rhuddanian-Aeronian (early Silurian) biserial graptolites and basal monograptids has been undertaken in order to test hypotheses of the relationships among the Neograptina ('normalograptids' and their descendents) and to provide a phylogenetic framework for understanding the early Silurian adaptive radiation of graptoloids. It is clear that Silurian graptolite faunas are dominated by two major clades, here named the superfamilies Retiolitoidea and Monograptoidea. Several other lineages whose basal relationships are unresolved, including Normalograptus and Metaclimacograptus, persisted through much of the Llandovery. The Retiolitoidea includes some taxa previously assigned to the Normalograptidae, as well as petalolithids and retiolitids. The Monograptoidea includes akidograptids, dimorphograptids, the uniserial monograptids, as well as stem taxa previously regarded as normalograptids. Both of these major clades had their origins in Late Ordovician time and began their diversification within the Hirnantian-early Rhuddanian, in step with the two main phases of the Hirnantian Mass Extinction. The Neograptina also exhibit an additional interval of accelerated turnover in the Rhuddanian during which the characteristic Silurian fauna largely replaced the Hirnantian Neograptina. One new family, Neodiplograptidae, and four new genera are described: Avitograptus, Rickardsograptus, Korenograptus and Paramplexograptus. Report Arctic Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Arctic Cape Phillips ENVELOPE(-62.600,-62.600,-84.750,-84.750) Proceedings of the Yorkshire Geological Society 58 4 281 309 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
CANADIAN-ARCTIC-ISLANDS CAPE-PHILLIPS FORMATION SOUTHERN URALS GRAPTOLITES ORDOVICIAN LLANDOVERY EVOLUTION CLASSIFICATION MORPHOLOGY BOUNDARY Geology |
spellingShingle |
CANADIAN-ARCTIC-ISLANDS CAPE-PHILLIPS FORMATION SOUTHERN URALS GRAPTOLITES ORDOVICIAN LLANDOVERY EVOLUTION CLASSIFICATION MORPHOLOGY BOUNDARY Geology Melchin, M. J. Mitchell, C. E. Naczk-Cameron, A. Fan, J. X. Loxton, J. Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery |
topic_facet |
CANADIAN-ARCTIC-ISLANDS CAPE-PHILLIPS FORMATION SOUTHERN URALS GRAPTOLITES ORDOVICIAN LLANDOVERY EVOLUTION CLASSIFICATION MORPHOLOGY BOUNDARY Geology |
description |
Cladistic analysis of some Hirnantian (latest Ordovician) and Rhuddanian-Aeronian (early Silurian) biserial graptolites and basal monograptids has been undertaken in order to test hypotheses of the relationships among the Neograptina ('normalograptids' and their descendents) and to provide a phylogenetic framework for understanding the early Silurian adaptive radiation of graptoloids. It is clear that Silurian graptolite faunas are dominated by two major clades, here named the superfamilies Retiolitoidea and Monograptoidea. Several other lineages whose basal relationships are unresolved, including Normalograptus and Metaclimacograptus, persisted through much of the Llandovery. The Retiolitoidea includes some taxa previously assigned to the Normalograptidae, as well as petalolithids and retiolitids. The Monograptoidea includes akidograptids, dimorphograptids, the uniserial monograptids, as well as stem taxa previously regarded as normalograptids. Both of these major clades had their origins in Late Ordovician time and began their diversification within the Hirnantian-early Rhuddanian, in step with the two main phases of the Hirnantian Mass Extinction. The Neograptina also exhibit an additional interval of accelerated turnover in the Rhuddanian during which the characteristic Silurian fauna largely replaced the Hirnantian Neograptina. One new family, Neodiplograptidae, and four new genera are described: Avitograptus, Rickardsograptus, Korenograptus and Paramplexograptus. |
format |
Report |
author |
Melchin, M. J. Mitchell, C. E. Naczk-Cameron, A. Fan, J. X. Loxton, J. |
author_facet |
Melchin, M. J. Mitchell, C. E. Naczk-Cameron, A. Fan, J. X. Loxton, J. |
author_sort |
Melchin, M. J. |
title |
Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery |
title_short |
Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery |
title_full |
Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery |
title_fullStr |
Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery |
title_full_unstemmed |
Phylogeny and Adaptive Radiation of the Neograptina (Graptoloida) During the Hirnantian Mass Extinction and Silurian Recovery |
title_sort |
phylogeny and adaptive radiation of the neograptina (graptoloida) during the hirnantian mass extinction and silurian recovery |
publisher |
GEOLOGICAL SOC PUBL HOUSE |
publishDate |
2011 |
url |
http://ir.nigpas.ac.cn/handle/332004/19885 https://doi.org/10.1144/pygs.58.4.301 |
long_lat |
ENVELOPE(-62.600,-62.600,-84.750,-84.750) |
geographic |
Arctic Cape Phillips |
geographic_facet |
Arctic Cape Phillips |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
PROCEEDINGS OF THE YORKSHIRE GEOLOGICAL SOCIETY http://ir.nigpas.ac.cn/handle/332004/19885 doi:10.1144/pygs.58.4.301 |
op_doi |
https://doi.org/10.1144/pygs.58.4.301 |
container_title |
Proceedings of the Yorkshire Geological
Society |
container_volume |
58 |
container_issue |
4 |
container_start_page |
281 |
op_container_end_page |
309 |
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1766339312944676864 |