Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska
Two new genera of coccolithophorids, one with two species, have been described and illustrated by means of electron microscopy of wild material from various sources in the northern or southern hemisphere. The main diagnostic features of the new genus Wigwamma (type species W. arctica sp. nov.) inclu...
Published in: | Proceedings of the Royal Society of London. Series B. Biological Sciences |
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Online Access: | http://dx.doi.org/10.1098/rspb.1977.0063 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1977.0063 |
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crroyalsociety:10.1098/rspb.1977.0063 2024-09-15T18:10:08+00:00 Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska 1977 http://dx.doi.org/10.1098/rspb.1977.0063 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1977.0063 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society of London. Series B. Biological Sciences volume 197, issue 1127, page 145-168 ISSN 0080-4649 2053-9193 journal-article 1977 crroyalsociety https://doi.org/10.1098/rspb.1977.0063 2024-08-19T04:24:53Z Two new genera of coccolithophorids, one with two species, have been described and illustrated by means of electron microscopy of wild material from various sources in the northern or southern hemisphere. The main diagnostic features of the new genus Wigwamma (type species W. arctica sp. nov.) include ‘ring-shaped’ coccoliths, attached to the edges of unmineralized plates with characteristic surface patterning, and with some or all carrying superstructures composed of four (or sometimes two) rod-shaped crystallites, converging to a point distally and attached proximally to the subtending calcified scale-rim in a characteristic manner. After comparisons with the unmineralized scales of Chrysochromulina , these coccoliths are interpreted as equivalent to the bases, including the support struts, of certain spined scales comparable in a general way with those of C. pringsheimii but with the spine itself undeveloped or vestigial. Analogous changes, carried out independently and with many differences of detail implying a different prototype source, are inferred to explain the coccolith morphology of another new genus, Calciarcus , at present only known in a preliminary way in the north Pacific (near Homer, S. Alaska). The coccoliths of this organism have been investigated chemically by means of the electron probe CORA. Further comparisons between Wigwamma , more especially W. annulifera sp. nov., and other coccolithophorids, notably Ceratolithus , Pappomonas and Papposphaera have emphasized the value of crystallographic details as taxonomic and phyletic markers, in situations where coccolith morphology as a whole is equivocal as a result of convergence. The available distributional data for all known arctic coccolithophorids are then summarized and the conclusion is drawn that collectively they may represent a highly selected community adjusted to arctic conditions and perhaps able to perennate locally but ultimately derived by immigration from the north Pacific. Other conclusions to which the arctic ... Article in Journal/Newspaper Greenland Alaska The Royal Society Proceedings of the Royal Society of London. Series B. Biological Sciences 197 1127 145 168 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Two new genera of coccolithophorids, one with two species, have been described and illustrated by means of electron microscopy of wild material from various sources in the northern or southern hemisphere. The main diagnostic features of the new genus Wigwamma (type species W. arctica sp. nov.) include ‘ring-shaped’ coccoliths, attached to the edges of unmineralized plates with characteristic surface patterning, and with some or all carrying superstructures composed of four (or sometimes two) rod-shaped crystallites, converging to a point distally and attached proximally to the subtending calcified scale-rim in a characteristic manner. After comparisons with the unmineralized scales of Chrysochromulina , these coccoliths are interpreted as equivalent to the bases, including the support struts, of certain spined scales comparable in a general way with those of C. pringsheimii but with the spine itself undeveloped or vestigial. Analogous changes, carried out independently and with many differences of detail implying a different prototype source, are inferred to explain the coccolith morphology of another new genus, Calciarcus , at present only known in a preliminary way in the north Pacific (near Homer, S. Alaska). The coccoliths of this organism have been investigated chemically by means of the electron probe CORA. Further comparisons between Wigwamma , more especially W. annulifera sp. nov., and other coccolithophorids, notably Ceratolithus , Pappomonas and Papposphaera have emphasized the value of crystallographic details as taxonomic and phyletic markers, in situations where coccolith morphology as a whole is equivocal as a result of convergence. The available distributional data for all known arctic coccolithophorids are then summarized and the conclusion is drawn that collectively they may represent a highly selected community adjusted to arctic conditions and perhaps able to perennate locally but ultimately derived by immigration from the north Pacific. Other conclusions to which the arctic ... |
format |
Article in Journal/Newspaper |
title |
Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska |
spellingShingle |
Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska |
title_short |
Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska |
title_full |
Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska |
title_fullStr |
Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska |
title_full_unstemmed |
Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and arctic Canada, W. annulifera sp. nov. from South Africa and S. Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska |
title_sort |
arctic coccolithophorids: wigwamma arctica gen. et sp. nov. from greenland and arctic canada, w. annulifera sp. nov. from south africa and s. alaska and calciarcus alaskensis gen. et sp. nov. from s. alaska |
publisher |
The Royal Society |
publishDate |
1977 |
url |
http://dx.doi.org/10.1098/rspb.1977.0063 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1977.0063 |
genre |
Greenland Alaska |
genre_facet |
Greenland Alaska |
op_source |
Proceedings of the Royal Society of London. Series B. Biological Sciences volume 197, issue 1127, page 145-168 ISSN 0080-4649 2053-9193 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.1977.0063 |
container_title |
Proceedings of the Royal Society of London. Series B. Biological Sciences |
container_volume |
197 |
container_issue |
1127 |
container_start_page |
145 |
op_container_end_page |
168 |
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1810447737524584448 |