Christensenia, a new terrestrial enchytraeid genus from Antarctica
| ISSN: |
1432-2056
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|---|---|
| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Biology
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| Notes: |
Abstract Christensenia gen. nov., C. blocki sp. nov., is described from Signy Island, South Orkney Islands, maritime Antarctic. The new species is identical with specimens that Stephenson (1932) determined as Marionina georgiana (Michaelsen, 1888), but differs from the type material of M. georgiana. The species M. georgiana (Michaelsen, 1888) is also placed in the new genus Christensenia, the main characteristics of which are: possession of sigmoid setae, and the presence of large numbers of small, hyaline, stick-like, anucleate lymphocytes. No other types of lymphocyte are observed. Oesophageal appendages and intestinal diverticulae are absent. Dorsal vessel originates in the clitellar region; blood is colourless. The anteseptal part of the nephridium consists of the funnel and a few canals, with the efferent duct arising postero-ventrally. Spermathecae are without diverticulae, entally connecting with the oesophagus. The known distribution of the genus is currently limited to terrestrial habitats in the sub- and maritime Antarctic.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798295924013793281 |
|---|---|
| autor | Dózsa-Farkas, K. Convey, P. |
| autorsonst | Dózsa-Farkas, K. Convey, P. |
| book_url | http://dx.doi.org/10.1007/s003000050146 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLM200824821 |
| issn | 1432-2056 |
| journal_name | Polar biology |
| materialart | 1 |
| notes | Abstract Christensenia gen. nov., C. blocki sp. nov., is described from Signy Island, South Orkney Islands, maritime Antarctic. The new species is identical with specimens that Stephenson (1932) determined as Marionina georgiana (Michaelsen, 1888), but differs from the type material of M. georgiana. The species M. georgiana (Michaelsen, 1888) is also placed in the new genus Christensenia, the main characteristics of which are: possession of sigmoid setae, and the presence of large numbers of small, hyaline, stick-like, anucleate lymphocytes. No other types of lymphocyte are observed. Oesophageal appendages and intestinal diverticulae are absent. Dorsal vessel originates in the clitellar region; blood is colourless. The anteseptal part of the nephridium consists of the funnel and a few canals, with the efferent duct arising postero-ventrally. Spermathecae are without diverticulae, entally connecting with the oesophagus. The known distribution of the genus is currently limited to terrestrial habitats in the sub- and maritime Antarctic. |
| package_name | Springer |
| publikationsjahr_anzeige | 1997 |
| publikationsjahr_facette | 1997 |
| publikationsjahr_intervall | 8004:1995-1999 |
| publikationsjahr_sort | 1997 |
| publisher | Springer |
| reference | 17 (1997), S. 482-486 |
| search_space | articles |
| shingle_author_1 | Dózsa-Farkas, K. Convey, P. |
| shingle_author_2 | Dózsa-Farkas, K. Convey, P. |
| shingle_author_3 | Dózsa-Farkas, K. Convey, P. |
| shingle_author_4 | Dózsa-Farkas, K. Convey, P. |
| shingle_catch_all_1 | Dózsa-Farkas, K. Convey, P. Christensenia, a new terrestrial enchytraeid genus from Antarctica Abstract Christensenia gen. nov., C. blocki sp. nov., is described from Signy Island, South Orkney Islands, maritime Antarctic. The new species is identical with specimens that Stephenson (1932) determined as Marionina georgiana (Michaelsen, 1888), but differs from the type material of M. georgiana. The species M. georgiana (Michaelsen, 1888) is also placed in the new genus Christensenia, the main characteristics of which are: possession of sigmoid setae, and the presence of large numbers of small, hyaline, stick-like, anucleate lymphocytes. No other types of lymphocyte are observed. Oesophageal appendages and intestinal diverticulae are absent. Dorsal vessel originates in the clitellar region; blood is colourless. The anteseptal part of the nephridium consists of the funnel and a few canals, with the efferent duct arising postero-ventrally. Spermathecae are without diverticulae, entally connecting with the oesophagus. The known distribution of the genus is currently limited to terrestrial habitats in the sub- and maritime Antarctic. 1432-2056 14322056 Springer |
| shingle_catch_all_2 | Dózsa-Farkas, K. Convey, P. Christensenia, a new terrestrial enchytraeid genus from Antarctica Abstract Christensenia gen. nov., C. blocki sp. nov., is described from Signy Island, South Orkney Islands, maritime Antarctic. The new species is identical with specimens that Stephenson (1932) determined as Marionina georgiana (Michaelsen, 1888), but differs from the type material of M. georgiana. The species M. georgiana (Michaelsen, 1888) is also placed in the new genus Christensenia, the main characteristics of which are: possession of sigmoid setae, and the presence of large numbers of small, hyaline, stick-like, anucleate lymphocytes. No other types of lymphocyte are observed. Oesophageal appendages and intestinal diverticulae are absent. Dorsal vessel originates in the clitellar region; blood is colourless. The anteseptal part of the nephridium consists of the funnel and a few canals, with the efferent duct arising postero-ventrally. Spermathecae are without diverticulae, entally connecting with the oesophagus. The known distribution of the genus is currently limited to terrestrial habitats in the sub- and maritime Antarctic. 1432-2056 14322056 Springer |
| shingle_catch_all_3 | Dózsa-Farkas, K. Convey, P. Christensenia, a new terrestrial enchytraeid genus from Antarctica Abstract Christensenia gen. nov., C. blocki sp. nov., is described from Signy Island, South Orkney Islands, maritime Antarctic. The new species is identical with specimens that Stephenson (1932) determined as Marionina georgiana (Michaelsen, 1888), but differs from the type material of M. georgiana. The species M. georgiana (Michaelsen, 1888) is also placed in the new genus Christensenia, the main characteristics of which are: possession of sigmoid setae, and the presence of large numbers of small, hyaline, stick-like, anucleate lymphocytes. No other types of lymphocyte are observed. Oesophageal appendages and intestinal diverticulae are absent. Dorsal vessel originates in the clitellar region; blood is colourless. The anteseptal part of the nephridium consists of the funnel and a few canals, with the efferent duct arising postero-ventrally. Spermathecae are without diverticulae, entally connecting with the oesophagus. The known distribution of the genus is currently limited to terrestrial habitats in the sub- and maritime Antarctic. 1432-2056 14322056 Springer |
| shingle_catch_all_4 | Dózsa-Farkas, K. Convey, P. Christensenia, a new terrestrial enchytraeid genus from Antarctica Abstract Christensenia gen. nov., C. blocki sp. nov., is described from Signy Island, South Orkney Islands, maritime Antarctic. The new species is identical with specimens that Stephenson (1932) determined as Marionina georgiana (Michaelsen, 1888), but differs from the type material of M. georgiana. The species M. georgiana (Michaelsen, 1888) is also placed in the new genus Christensenia, the main characteristics of which are: possession of sigmoid setae, and the presence of large numbers of small, hyaline, stick-like, anucleate lymphocytes. No other types of lymphocyte are observed. Oesophageal appendages and intestinal diverticulae are absent. Dorsal vessel originates in the clitellar region; blood is colourless. The anteseptal part of the nephridium consists of the funnel and a few canals, with the efferent duct arising postero-ventrally. Spermathecae are without diverticulae, entally connecting with the oesophagus. The known distribution of the genus is currently limited to terrestrial habitats in the sub- and maritime Antarctic. 1432-2056 14322056 Springer |
| shingle_title_1 | Christensenia, a new terrestrial enchytraeid genus from Antarctica |
| shingle_title_2 | Christensenia, a new terrestrial enchytraeid genus from Antarctica |
| shingle_title_3 | Christensenia, a new terrestrial enchytraeid genus from Antarctica |
| shingle_title_4 | Christensenia, a new terrestrial enchytraeid genus from Antarctica |
| sigel_instance_filter | dkfz geomar wilbert ipn albert fhp |
| source_archive | Springer Online Journal Archives 1860-2000 |
| timestamp | 2024-05-06T09:43:55.718Z |
| titel | Christensenia, a new terrestrial enchytraeid genus from Antarctica |
| titel_suche | Christensenia, a new terrestrial enchytraeid genus from Antarctica |
| topic | W |
| uid | nat_lic_papers_NLM200824821 |