Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota
The morphology and ultrastructure of four species of Cryothecomonas gen.nov. (Protista incertae sedis) in material from the Weddell Sea, Antarctica, and the Isefjord, Denmark, are described. These heterotrophic flagellates, which were initially observed in association with sea ice, display a unique...
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Canadian Science Publishing
1991
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ftoceanrep:oai:oceanrep.geomar.de:31479 2023-05-15T13:54:29+02:00 Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota Thomsen, Helge A. Buck, Kurt R. Bolt, Patricia A. Garrison, David L. 1991 text https://oceanrep.geomar.de/id/eprint/31479/ https://oceanrep.geomar.de/id/eprint/31479/1/Thomsen.pdf en eng Canadian Science Publishing https://oceanrep.geomar.de/id/eprint/31479/1/Thomsen.pdf Thomsen, H. A., Buck, K. R., Bolt, P. A. and Garrison, D. L. (1991) Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota. Canadian Journal of Zoology, 69 (4). pp. 1048-1070. info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1991 ftoceanrep 2023-04-07T15:23:44Z The morphology and ultrastructure of four species of Cryothecomonas gen.nov. (Protista incertae sedis) in material from the Weddell Sea, Antarctica, and the Isefjord, Denmark, are described. These heterotrophic flagellates, which were initially observed in association with sea ice, display a unique combination of morphological characteristics. At present it is impossible to assign the new genus to an existing higher taxonomic level of protistan flagellates. Cryothecomonas species are furnished with a close-fitting multilayered theca. The two naked anterior flagella emerge through narrow thecal funnels. A transitional helix is part of the flagellar transition zone. A conspicuous cytostome is located in a posterior (lateral) position. Food uptake is mediated through the extension of cytostomal pseudopodia. The nucleus is anteriorly located and contains a conspicuous nucleolus and distinct areas of chromatin. Mitochondrial cristae are tubular. Cryothecomonas species feed on cells in the size range 2–4.5 μm (e.g., algal flagellates). Data are presented on the abundance of Cryothecomonas armigera sp.nov. in Antarctic waters. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Weddell Weddell Sea |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The morphology and ultrastructure of four species of Cryothecomonas gen.nov. (Protista incertae sedis) in material from the Weddell Sea, Antarctica, and the Isefjord, Denmark, are described. These heterotrophic flagellates, which were initially observed in association with sea ice, display a unique combination of morphological characteristics. At present it is impossible to assign the new genus to an existing higher taxonomic level of protistan flagellates. Cryothecomonas species are furnished with a close-fitting multilayered theca. The two naked anterior flagella emerge through narrow thecal funnels. A transitional helix is part of the flagellar transition zone. A conspicuous cytostome is located in a posterior (lateral) position. Food uptake is mediated through the extension of cytostomal pseudopodia. The nucleus is anteriorly located and contains a conspicuous nucleolus and distinct areas of chromatin. Mitochondrial cristae are tubular. Cryothecomonas species feed on cells in the size range 2–4.5 μm (e.g., algal flagellates). Data are presented on the abundance of Cryothecomonas armigera sp.nov. in Antarctic waters. |
format |
Article in Journal/Newspaper |
author |
Thomsen, Helge A. Buck, Kurt R. Bolt, Patricia A. Garrison, David L. |
spellingShingle |
Thomsen, Helge A. Buck, Kurt R. Bolt, Patricia A. Garrison, David L. Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota |
author_facet |
Thomsen, Helge A. Buck, Kurt R. Bolt, Patricia A. Garrison, David L. |
author_sort |
Thomsen, Helge A. |
title |
Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota |
title_short |
Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota |
title_full |
Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota |
title_fullStr |
Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota |
title_full_unstemmed |
Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota |
title_sort |
fine structure and biology of cryothecomonas gen.nov. (protista incertae sedis) from the ice biota |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
https://oceanrep.geomar.de/id/eprint/31479/ https://oceanrep.geomar.de/id/eprint/31479/1/Thomsen.pdf |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/31479/1/Thomsen.pdf Thomsen, H. A., Buck, K. R., Bolt, P. A. and Garrison, D. L. (1991) Fine structure and biology of Cryothecomonas gen.nov. (Protista incertae sedis) from the ice biota. Canadian Journal of Zoology, 69 (4). pp. 1048-1070. |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766260418968289280 |