A new post-early Cambrian archaeocyath from Antarctica
A new species of archaeocyath sponge, Dictyocyathus neptunensis, is described from the lower third of the Nelson Limestone of the Neptune Range, Antarctica. Based on the presence of the trilobites Nelsonia schesis and Amphoton oatesi, these strata are interpreted to be mid- to late middle Cambrian i...
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1992
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ftmissouristuniv:oai:bearworks.missouristate.edu:articles-cnas-3892 2023-05-15T13:52:44+02:00 A new post-early Cambrian archaeocyath from Antarctica Wood, Rachel A. Evans, Kevin R. Zhuravlev, Andrey Yu 1992-01-01T08:00:00Z https://bearworks.missouristate.edu/articles-cnas/2893 https://doi.org/10.1017/S0016756800019579 unknown BearWorks https://bearworks.missouristate.edu/articles-cnas/2893 https://doi.org/10.1017/S0016756800019579 College of Natural and Applied Sciences text 1992 ftmissouristuniv https://doi.org/10.1017/S0016756800019579 2022-02-28T19:47:04Z A new species of archaeocyath sponge, Dictyocyathus neptunensis, is described from the lower third of the Nelson Limestone of the Neptune Range, Antarctica. Based on the presence of the trilobites Nelsonia schesis and Amphoton oatesi, these strata are interpreted to be mid- to late middle Cambrian in age. D. neptunensis shows a branching, low integration modular form and a very simple skeletal type. Such an organization is predicted from known morphological trends within the early Cambrian Archaeocyatha. Specimens are not in life position, and probably form part of a storm deposit. The absence of Dictyocyathus from latest early Cambrian (Toyonian) strata worldwide suggests a convergent nature for this highly simplified skeletal type in archaeocyaths. Text Antarc* Antarctica Missouri State University: BearWorks Neptune Range ENVELOPE(-53.000,-53.000,-84.000,-84.000) Geological Magazine 129 4 491 495 |
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Open Polar |
collection |
Missouri State University: BearWorks |
op_collection_id |
ftmissouristuniv |
language |
unknown |
description |
A new species of archaeocyath sponge, Dictyocyathus neptunensis, is described from the lower third of the Nelson Limestone of the Neptune Range, Antarctica. Based on the presence of the trilobites Nelsonia schesis and Amphoton oatesi, these strata are interpreted to be mid- to late middle Cambrian in age. D. neptunensis shows a branching, low integration modular form and a very simple skeletal type. Such an organization is predicted from known morphological trends within the early Cambrian Archaeocyatha. Specimens are not in life position, and probably form part of a storm deposit. The absence of Dictyocyathus from latest early Cambrian (Toyonian) strata worldwide suggests a convergent nature for this highly simplified skeletal type in archaeocyaths. |
format |
Text |
author |
Wood, Rachel A. Evans, Kevin R. Zhuravlev, Andrey Yu |
spellingShingle |
Wood, Rachel A. Evans, Kevin R. Zhuravlev, Andrey Yu A new post-early Cambrian archaeocyath from Antarctica |
author_facet |
Wood, Rachel A. Evans, Kevin R. Zhuravlev, Andrey Yu |
author_sort |
Wood, Rachel A. |
title |
A new post-early Cambrian archaeocyath from Antarctica |
title_short |
A new post-early Cambrian archaeocyath from Antarctica |
title_full |
A new post-early Cambrian archaeocyath from Antarctica |
title_fullStr |
A new post-early Cambrian archaeocyath from Antarctica |
title_full_unstemmed |
A new post-early Cambrian archaeocyath from Antarctica |
title_sort |
new post-early cambrian archaeocyath from antarctica |
publisher |
BearWorks |
publishDate |
1992 |
url |
https://bearworks.missouristate.edu/articles-cnas/2893 https://doi.org/10.1017/S0016756800019579 |
long_lat |
ENVELOPE(-53.000,-53.000,-84.000,-84.000) |
geographic |
Neptune Range |
geographic_facet |
Neptune Range |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
College of Natural and Applied Sciences |
op_relation |
https://bearworks.missouristate.edu/articles-cnas/2893 https://doi.org/10.1017/S0016756800019579 |
op_doi |
https://doi.org/10.1017/S0016756800019579 |
container_title |
Geological Magazine |
container_volume |
129 |
container_issue |
4 |
container_start_page |
491 |
op_container_end_page |
495 |
_version_ |
1766257198348894208 |