A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp.
ABSTRACT. Seven marine gymnamoebae were isolated from different environments of seawater, slush (pack ice meltwater), and sediment in the Ross Sea area of Antarctica. All amoebae were isolated and maintained at temperatures below 4°C. Growth, rate of locomotion, and general morphology were observed...
Published in: | The Journal of Eukaryotic Microbiology |
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crwiley:10.1111/j.1550-7408.2007.00249.x 2024-06-02T07:58:32+00:00 A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. MORAN, DAWN M. ANDERSON, O. ROGER DENNETT, MARK R. CARON, DAVID A. GAST, REBECCA J. 2007 http://dx.doi.org/10.1111/j.1550-7408.2007.00249.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1550-7408.2007.00249.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1550-7408.2007.00249.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Eukaryotic Microbiology volume 54, issue 2, page 169-183 ISSN 1066-5234 1550-7408 journal-article 2007 crwiley https://doi.org/10.1111/j.1550-7408.2007.00249.x 2024-05-03T10:37:11Z ABSTRACT. Seven marine gymnamoebae were isolated from different environments of seawater, slush (pack ice meltwater), and sediment in the Ross Sea area of Antarctica. All amoebae were isolated and maintained at temperatures below 4°C. Growth, rate of locomotion, and general morphology were observed at an environmentally appropriate temperature (1°C) and at room temperature (∼25°C). Molecular (srDNA sequences) and microscopical techniques were used to identify the gymnamoebae and establish their phylogenetic affinities. Three isolates (S‐131‐2, SL‐200, and W4‐3) were assigned to a psychrophilic subspecies of Neoparamoeba aestuarina , N. aestuarina antarctica n. subsp., one isolate (S‐205) was assigned to a new species of Platyamoeba , P. oblongata n. sp., two isolates (W51C#4 & W51C#5) were also assigned to a new species of Platyamoeba, P. contorta n. sp., and one isolate (S‐241) was a novel psychrophilic gymnamoeba Vermistella antarctica n. gen. n. sp. Molecular and morphological results revealed that V. antarctica was not related to any described family of gymnamoebae. Strains S‐205, W51C#4, and W51C#5 were capable of locomotion at room temperature, while strains SL‐200, S‐131‐2, W4‐3, and S‐241 exhibited locomotion only below ∼10°C. Our results imply that the Antarctic environment is host both to cosmopolitan gymnamoebae that have acquired adaptations for existence at low environmental temperature and to apparently novel psychrophilic amoebae described here for the first time. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Wiley Online Library Antarctic Ross Sea The Antarctic The Journal of Eukaryotic Microbiology 54 2 169 183 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT. Seven marine gymnamoebae were isolated from different environments of seawater, slush (pack ice meltwater), and sediment in the Ross Sea area of Antarctica. All amoebae were isolated and maintained at temperatures below 4°C. Growth, rate of locomotion, and general morphology were observed at an environmentally appropriate temperature (1°C) and at room temperature (∼25°C). Molecular (srDNA sequences) and microscopical techniques were used to identify the gymnamoebae and establish their phylogenetic affinities. Three isolates (S‐131‐2, SL‐200, and W4‐3) were assigned to a psychrophilic subspecies of Neoparamoeba aestuarina , N. aestuarina antarctica n. subsp., one isolate (S‐205) was assigned to a new species of Platyamoeba , P. oblongata n. sp., two isolates (W51C#4 & W51C#5) were also assigned to a new species of Platyamoeba, P. contorta n. sp., and one isolate (S‐241) was a novel psychrophilic gymnamoeba Vermistella antarctica n. gen. n. sp. Molecular and morphological results revealed that V. antarctica was not related to any described family of gymnamoebae. Strains S‐205, W51C#4, and W51C#5 were capable of locomotion at room temperature, while strains SL‐200, S‐131‐2, W4‐3, and S‐241 exhibited locomotion only below ∼10°C. Our results imply that the Antarctic environment is host both to cosmopolitan gymnamoebae that have acquired adaptations for existence at low environmental temperature and to apparently novel psychrophilic amoebae described here for the first time. |
format |
Article in Journal/Newspaper |
author |
MORAN, DAWN M. ANDERSON, O. ROGER DENNETT, MARK R. CARON, DAVID A. GAST, REBECCA J. |
spellingShingle |
MORAN, DAWN M. ANDERSON, O. ROGER DENNETT, MARK R. CARON, DAVID A. GAST, REBECCA J. A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. |
author_facet |
MORAN, DAWN M. ANDERSON, O. ROGER DENNETT, MARK R. CARON, DAVID A. GAST, REBECCA J. |
author_sort |
MORAN, DAWN M. |
title |
A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. |
title_short |
A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. |
title_full |
A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. |
title_fullStr |
A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. |
title_full_unstemmed |
A Description of Seven Antarctic Marine Gymnamoebae Including a New Subspecies, Two New Species and a New Genus: Neoparamoeba aestuarina antarctica n. subsp., Platyamoeba oblongata n. sp., Platyamoeba contorta n. sp. and Vermistella antarctica n. gen. n. sp. |
title_sort |
description of seven antarctic marine gymnamoebae including a new subspecies, two new species and a new genus: neoparamoeba aestuarina antarctica n. subsp., platyamoeba oblongata n. sp., platyamoeba contorta n. sp. and vermistella antarctica n. gen. n. sp. |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1550-7408.2007.00249.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1550-7408.2007.00249.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1550-7408.2007.00249.x |
geographic |
Antarctic Ross Sea The Antarctic |
geographic_facet |
Antarctic Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_source |
Journal of Eukaryotic Microbiology volume 54, issue 2, page 169-183 ISSN 1066-5234 1550-7408 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1550-7408.2007.00249.x |
container_title |
The Journal of Eukaryotic Microbiology |
container_volume |
54 |
container_issue |
2 |
container_start_page |
169 |
op_container_end_page |
183 |
_version_ |
1800741908899692544 |