Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov.
Bithekammina gen. nov. The systematic division of higher taxa based on morphology has little support from molecular studies (Pawlowski et al. 2002). We therefore recognise the family Saccamminidae only in order to provide a systematic context for our new taxa that is consistent with previous studies...
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Zenodo
2011
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Online Access: | https://dx.doi.org/10.5281/zenodo.6183138 https://zenodo.org/record/6183138 |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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unknown |
topic |
Biodiversity Taxonomy Chromista Foraminifera Monothalamea Astrorhizida Saccamminidae Bithekammina |
spellingShingle |
Biodiversity Taxonomy Chromista Foraminifera Monothalamea Astrorhizida Saccamminidae Bithekammina Silva, Ana Aranda Da Gooday, Andrew J. Pearse, Richard B. Cunha, Marina R. Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. |
topic_facet |
Biodiversity Taxonomy Chromista Foraminifera Monothalamea Astrorhizida Saccamminidae Bithekammina |
description |
Bithekammina gen. nov. The systematic division of higher taxa based on morphology has little support from molecular studies (Pawlowski et al. 2002). We therefore recognise the family Saccamminidae only in order to provide a systematic context for our new taxa that is consistent with previous studies. Etymology. The first part of the name (the suffix bi) means two; the middle part (theka) derives from the Greek theke (θηκη) meaning case or test; the last part (-ammina) is a common ending for generic names of agglutinating foraminiferans and is derived from the Greek word ammos (αμμος), meaning sand. Type species. Bithekammina occulta Aranda da Silva and Gooday Diagnosis. Test free, monothalamous, spherical to ovate in shape, and generally 200–400 µm in size. Test surface very smooth, translucent with diffuse silvery highlighted in reflected light. Single aperture forms round opening with slightly raised rim but otherwise without any associated structures. Wall thin and composed largely of tiny (usually 1–2 µm) plate-like clay particles overlying organic lining. Cell body with large nucleus, but without any other obvious inclusions. Test typically enclosed within larger, more coarsely agglutinated case (‘secondary test’), which gives rise to long, narrow tubular extension that corresponds to the aperture of the primary test. Remarks. The most interesting characteristic of Bithekammina is the fact that the test is enclosed in an outer agglutinated case, a feature not present in any other named ‘saccamminid’. The test itself resembles that of the newly-described genus Niveus Altin, Habura & Goldstein 2009 (type species N. flexilis ) in being rather small, flexible and ovate in shape with an outer surface composed of tiny, flake-like clay particles. In N. flexilis, however, these particles overlie a much thicker inner organic lining, so that the test appears to have an organic wall when viewed under a dissecting microscope. The organic lining is thin in our new genus and the wall is separated from the cell body by what appears to be an open space, which is wider near the distal end than the proximal end. Another recently described ‘saccamminid’ genus, Leptammina Cedhagen, Gooday & Pawlowski 2009 (type species L. flavofusca ), is much larger (up to 2 mm diameter) than Bithekammina and has a thicker test wall. It also has a clearly developed endosolenial tube, a feature absent in Bithekammina . Apart from the presence of a secondary agglutinated case, Bithekammina differs from Ovammina (type species O. opaca Dahlgren, 1962) in having an oval rather than egg-shaped to fusiform shape, a much thinner and more finely agglutinated test wall, and in lacking a well-developed endosolenial tube. : Published as part of Silva, Ana Aranda Da, Gooday, Andrew J., Pearse, Richard B. & Cunha, Marina R., 2011, A new ' saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic), pp. 49-58 in Zootaxa 2912 on page 51, DOI: 10.5281/zenodo.207867 : {"references": ["Pawlowski, J., Holzmann, M., Berney, C., Fahrni, J., Cedhagen, T. & Bowser, S. S. (2002) Phylogeny of allogromiid foraminifera inferred from SSU rRNA gene sequences. Journal of Foraminiferal Research, 32 (4), 334 - 343.", "Altin, D. Z., Habura, A. & Goldstein, S. T. (2009) A New Allogromiid Foraminifer Niveus flexilis nov. gen., nov. sp., from Coastal Georgia, USA: Fine Structure and Gametogenesis. Journal of Foraminiferal Research, 39, 73 - 86.", "Cedhagen, T., Gooday, A. J. & Pawlowski, J. (2009) A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean. Zootaxa, 2096, 9 - 22.", "Dahlgren, L. (1962) A new monothalamous foraminifer, Ovammina opaca n. gen., n. sp., belonging to the family Saccamminidae. Zoologiska Bidrag fran Uppsala, 33, 197 - 200."]} |
format |
Text |
author |
Silva, Ana Aranda Da Gooday, Andrew J. Pearse, Richard B. Cunha, Marina R. |
author_facet |
Silva, Ana Aranda Da Gooday, Andrew J. Pearse, Richard B. Cunha, Marina R. |
author_sort |
Silva, Ana Aranda Da |
title |
Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. |
title_short |
Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. |
title_full |
Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. |
title_fullStr |
Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. |
title_full_unstemmed |
Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. |
title_sort |
bithekammina silva, gooday, pearse & cunha, 2011, gen. nov. |
publisher |
Zenodo |
publishDate |
2011 |
url |
https://dx.doi.org/10.5281/zenodo.6183138 https://zenodo.org/record/6183138 |
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ENVELOPE(-60.783,-60.783,-62.467,-62.467) ENVELOPE(-155.600,-155.600,-86.050,-86.050) |
geographic |
Aranda Bowser Southern Ocean |
geographic_facet |
Aranda Bowser Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
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http://publication.plazi.org/id/FFD4117FFFE8D0620A284A2DFFA46014 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.207867 http://publication.plazi.org/id/FFD4117FFFE8D0620A284A2DFFA46014 https://dx.doi.org/10.5281/zenodo.6183137 https://zenodo.org/communities/biosyslit |
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Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
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CC0 |
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https://doi.org/10.5281/zenodo.6183138 https://doi.org/10.5281/zenodo.207867 https://doi.org/10.5281/zenodo.6183137 |
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ftdatacite:10.5281/zenodo.6183138 2023-05-15T18:26:06+02:00 Bithekammina Silva, Gooday, Pearse & Cunha, 2011, gen. nov. Silva, Ana Aranda Da Gooday, Andrew J. Pearse, Richard B. Cunha, Marina R. 2011 https://dx.doi.org/10.5281/zenodo.6183138 https://zenodo.org/record/6183138 unknown Zenodo http://publication.plazi.org/id/FFD4117FFFE8D0620A284A2DFFA46014 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.207867 http://publication.plazi.org/id/FFD4117FFFE8D0620A284A2DFFA46014 https://dx.doi.org/10.5281/zenodo.6183137 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Chromista Foraminifera Monothalamea Astrorhizida Saccamminidae Bithekammina article-journal ScholarlyArticle Taxonomic treatment Text 2011 ftdatacite https://doi.org/10.5281/zenodo.6183138 https://doi.org/10.5281/zenodo.207867 https://doi.org/10.5281/zenodo.6183137 2022-04-01T11:26:21Z Bithekammina gen. nov. The systematic division of higher taxa based on morphology has little support from molecular studies (Pawlowski et al. 2002). We therefore recognise the family Saccamminidae only in order to provide a systematic context for our new taxa that is consistent with previous studies. Etymology. The first part of the name (the suffix bi) means two; the middle part (theka) derives from the Greek theke (θηκη) meaning case or test; the last part (-ammina) is a common ending for generic names of agglutinating foraminiferans and is derived from the Greek word ammos (αμμος), meaning sand. Type species. Bithekammina occulta Aranda da Silva and Gooday Diagnosis. Test free, monothalamous, spherical to ovate in shape, and generally 200–400 µm in size. Test surface very smooth, translucent with diffuse silvery highlighted in reflected light. Single aperture forms round opening with slightly raised rim but otherwise without any associated structures. Wall thin and composed largely of tiny (usually 1–2 µm) plate-like clay particles overlying organic lining. Cell body with large nucleus, but without any other obvious inclusions. Test typically enclosed within larger, more coarsely agglutinated case (‘secondary test’), which gives rise to long, narrow tubular extension that corresponds to the aperture of the primary test. Remarks. The most interesting characteristic of Bithekammina is the fact that the test is enclosed in an outer agglutinated case, a feature not present in any other named ‘saccamminid’. The test itself resembles that of the newly-described genus Niveus Altin, Habura & Goldstein 2009 (type species N. flexilis ) in being rather small, flexible and ovate in shape with an outer surface composed of tiny, flake-like clay particles. In N. flexilis, however, these particles overlie a much thicker inner organic lining, so that the test appears to have an organic wall when viewed under a dissecting microscope. The organic lining is thin in our new genus and the wall is separated from the cell body by what appears to be an open space, which is wider near the distal end than the proximal end. Another recently described ‘saccamminid’ genus, Leptammina Cedhagen, Gooday & Pawlowski 2009 (type species L. flavofusca ), is much larger (up to 2 mm diameter) than Bithekammina and has a thicker test wall. It also has a clearly developed endosolenial tube, a feature absent in Bithekammina . Apart from the presence of a secondary agglutinated case, Bithekammina differs from Ovammina (type species O. opaca Dahlgren, 1962) in having an oval rather than egg-shaped to fusiform shape, a much thinner and more finely agglutinated test wall, and in lacking a well-developed endosolenial tube. : Published as part of Silva, Ana Aranda Da, Gooday, Andrew J., Pearse, Richard B. & Cunha, Marina R., 2011, A new ' saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic), pp. 49-58 in Zootaxa 2912 on page 51, DOI: 10.5281/zenodo.207867 : {"references": ["Pawlowski, J., Holzmann, M., Berney, C., Fahrni, J., Cedhagen, T. & Bowser, S. S. (2002) Phylogeny of allogromiid foraminifera inferred from SSU rRNA gene sequences. Journal of Foraminiferal Research, 32 (4), 334 - 343.", "Altin, D. Z., Habura, A. & Goldstein, S. T. (2009) A New Allogromiid Foraminifer Niveus flexilis nov. gen., nov. sp., from Coastal Georgia, USA: Fine Structure and Gametogenesis. Journal of Foraminiferal Research, 39, 73 - 86.", "Cedhagen, T., Gooday, A. J. & Pawlowski, J. (2009) A new genus and two new species of saccamminid foraminiferans (Protista, Rhizaria) from the deep Southern Ocean. Zootaxa, 2096, 9 - 22.", "Dahlgren, L. (1962) A new monothalamous foraminifer, Ovammina opaca n. gen., n. sp., belonging to the family Saccamminidae. Zoologiska Bidrag fran Uppsala, 33, 197 - 200."]} Text Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Aranda ENVELOPE(-60.783,-60.783,-62.467,-62.467) Bowser ENVELOPE(-155.600,-155.600,-86.050,-86.050) Southern Ocean |