New species of Thyasiridae from a methane seepage area off Concepción, Chile
A new species of Thyasira (T. methanophila n. sp.) is described from a methane seepage area off Concepción, Chile (~36ºS) at bathyal depths. This species shows affinity with other southern ocean species placed in the subgenus Maorithyas. The gross anatomy of the type species of Maorithyas, M. marama...
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2005
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ftmagnoliapress:oai:https://mapress.com/oai/:article/945 2024-04-14T08:20:01+00:00 New species of Thyasiridae from a methane seepage area off Concepción, Chile OLIVER, P. GRAHAM SELLANES, JAVIER 2005-12-08 application/pdf https://www.mapress.com/zt/article/view/zootaxa.1092.1.1 eng eng Mangolia Press https://www.mapress.com/zt/article/view/zootaxa.1092.1.1/10827 https://www.mapress.com/zt/article/view/zootaxa.1092.1.1 Copyright (c) 2015 Zootaxa Zootaxa; Vol. 1092 No. 1: 8 Dec. 2005; 1–20 1175-5334 1175-5326 10.11646/zootaxa.1092.1 Mollusca Thyasiridae morphology methane seep Chile new species info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2005 ftmagnoliapress https://doi.org/10.11646/zootaxa.1092.1 2024-03-21T18:13:00Z A new species of Thyasira (T. methanophila n. sp.) is described from a methane seepage area off Concepción, Chile (~36ºS) at bathyal depths. This species shows affinity with other southern ocean species placed in the subgenus Maorithyas. The gross anatomy of the type species of Maorithyas, M. marama Fleming, 1950, is described for the first time. There are no gross anatomical differences in the ctendia, foot and gut, between the above taxa, which suggest that there are no differences anatomically between species living at seeps and species living in other environments. Furthermore, wider comparison of the shells suggests that the subgenus Maorithyas cannot be supported, as the differential characters grade into those of Thyasira. Scanning electron microscopy of the ctenidium, of T. methanophila, revealed filaments with closely packed bacteriocytes each with dense aggregations of small rod shaped bacteria each about 0.5 mm in length. The bivalve is assumed to be highly dependent on the symbiotic relationship. A second thyasirid was recorded from worn valves only and is assigned to the genus Conchocele. The material is too fragmentary to describe but was compared with C. bisecta and C. novaeguinensis. Article in Journal/Newspaper Southern Ocean Magnolia press Southern Ocean Zootaxa 1092 1 |
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Open Polar |
collection |
Magnolia press |
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ftmagnoliapress |
language |
English |
topic |
Mollusca Thyasiridae morphology methane seep Chile new species |
spellingShingle |
Mollusca Thyasiridae morphology methane seep Chile new species OLIVER, P. GRAHAM SELLANES, JAVIER New species of Thyasiridae from a methane seepage area off Concepción, Chile |
topic_facet |
Mollusca Thyasiridae morphology methane seep Chile new species |
description |
A new species of Thyasira (T. methanophila n. sp.) is described from a methane seepage area off Concepción, Chile (~36ºS) at bathyal depths. This species shows affinity with other southern ocean species placed in the subgenus Maorithyas. The gross anatomy of the type species of Maorithyas, M. marama Fleming, 1950, is described for the first time. There are no gross anatomical differences in the ctendia, foot and gut, between the above taxa, which suggest that there are no differences anatomically between species living at seeps and species living in other environments. Furthermore, wider comparison of the shells suggests that the subgenus Maorithyas cannot be supported, as the differential characters grade into those of Thyasira. Scanning electron microscopy of the ctenidium, of T. methanophila, revealed filaments with closely packed bacteriocytes each with dense aggregations of small rod shaped bacteria each about 0.5 mm in length. The bivalve is assumed to be highly dependent on the symbiotic relationship. A second thyasirid was recorded from worn valves only and is assigned to the genus Conchocele. The material is too fragmentary to describe but was compared with C. bisecta and C. novaeguinensis. |
format |
Article in Journal/Newspaper |
author |
OLIVER, P. GRAHAM SELLANES, JAVIER |
author_facet |
OLIVER, P. GRAHAM SELLANES, JAVIER |
author_sort |
OLIVER, P. GRAHAM |
title |
New species of Thyasiridae from a methane seepage area off Concepción, Chile |
title_short |
New species of Thyasiridae from a methane seepage area off Concepción, Chile |
title_full |
New species of Thyasiridae from a methane seepage area off Concepción, Chile |
title_fullStr |
New species of Thyasiridae from a methane seepage area off Concepción, Chile |
title_full_unstemmed |
New species of Thyasiridae from a methane seepage area off Concepción, Chile |
title_sort |
new species of thyasiridae from a methane seepage area off concepción, chile |
publisher |
Mangolia Press |
publishDate |
2005 |
url |
https://www.mapress.com/zt/article/view/zootaxa.1092.1.1 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Zootaxa; Vol. 1092 No. 1: 8 Dec. 2005; 1–20 1175-5334 1175-5326 10.11646/zootaxa.1092.1 |
op_relation |
https://www.mapress.com/zt/article/view/zootaxa.1092.1.1/10827 https://www.mapress.com/zt/article/view/zootaxa.1092.1.1 |
op_rights |
Copyright (c) 2015 Zootaxa |
op_doi |
https://doi.org/10.11646/zootaxa.1092.1 |
container_title |
Zootaxa |
container_volume |
1092 |
container_issue |
1 |
_version_ |
1796298198561587200 |