Ascidia callosa Stimpson 1852
Ascidia callosa Stimpson, 1852 (Figure 2) Ascidia callosa Stimpson, 1852: 228. Lambert & Sanamyan, 2001: 1772 (synonymy). Material examined. Matua Island, Point Kluv, 16 m, one specimen (#177). Description. The single collected specimen is small, about 10 mm long, attached by a whole left side (...
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2017
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Online Access: | https://dx.doi.org/10.5281/zenodo.6049270 https://zenodo.org/record/6049270 |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Ascidiidae Ascidia Ascidia callosa |
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Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Ascidiidae Ascidia Ascidia callosa Sanamyan, Karen Sanamyan, Nadya Ascidia callosa Stimpson 1852 |
topic_facet |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Ascidiidae Ascidia Ascidia callosa |
description |
Ascidia callosa Stimpson, 1852 (Figure 2) Ascidia callosa Stimpson, 1852: 228. Lambert & Sanamyan, 2001: 1772 (synonymy). Material examined. Matua Island, Point Kluv, 16 m, one specimen (#177). Description. The single collected specimen is small, about 10 mm long, attached by a whole left side (Figure 2 A). The test is thick and soft, semitransparent, the body is clearly visible through it. Its surface in preservative is finely wrinkled, almost smooth, covered by filamentous diatoms, giving an impression of test hairs, but actually neither test hairs, nor papillae are present. The body removed from the test is oval in outline, with the terminal branchial siphon and the atrial siphon placed in one-third of the body length distant from it along the dorsal side. The muscles form an irregular dense network on the right side of the body but absent on the left. The branchial tentacles are not numerous, about 17, in two size ranges. Prepharyngeal band is composed of two blades, it forms very shallow, almost not discernible V around minute dorsal tubercle, which is hard to detect. The branchial sac has 18 internal longitudinal vessels on the right and 16 on the left (Figure 2 D). Intermediate branchial papillae are present but not everywhere. The dorsal lamina is high. The transverse branchial vessels continue to the dorsal lamina and project from its rim, giving it a ribbed appearance. The visceral mass occupies most part of the left side. The stomach is short, oval, located at postero-ventral part of the body. Voluminous intestine makes narrow closed loop along the whole ventral mid line, its pole is located almost behind the branchial siphon. The secondary loop is also narrow and closed. The rectum is straight, not long, and the anus is bi-lobed, with a plain margin. The ovary consist of a main tubule, running in the primary gut loop along its axis, and numerous, mostly perpendicular side branches spread over ascending and descending limbs of the gut loop (Figure 2 C). Whole visceral mass is covered by numerous renal vesicles. Remarks. Ascidia callosa is a single species of the family Ascidiidae occurring in diver-accessible depths (down to about 40 m) in a wide NW Pacific region from Commander Islands, through Kamchatka waters, where it is quite common, to at least central Kuril Islands. In NE Pacific, at Alaska coasts, A. callosa coexists with a similar, but distinct species A. columbiana (Huntsman, 1912) (see Lambert & Sanamyan, 2001). Sanamyan (1998) reported Ascidia prunum Muller, 1776 from north Kuril Islands, but these specimens come from greater depths (118–370 m). The identity of that material needs confirmation but it is certainly not conspecific with A. callosa having much more internal longitudinal branchial vessels. : Published as part of Sanamyan, Karen & Sanamyan, Nadya, 2017, Shallow-water Ascidians from Matua Island (central Kuril Islands, NW Pacific), pp. 301-321 in Zootaxa 4232 (3) on pages 302-303, DOI: 10.11646/zootaxa.4232.3.1, http://zenodo.org/record/293689 : {"references": ["Stimpson, W. (1852) Several new ascidians from the coast of the United States. Proceedings of the Boston Society of Natural History, 4, 228 - 232.", "Lambert, G. & Sanamyan, K. (2001) Distaplia alaskensis sp. nov. (Ascidiacea, Aplousobranchia) and other new ascidian records from south-central Alaska, with a redescription of Ascidia columbiana (Huntsman, 1912). Canadian Journal of Zoology, 79, 1766 - 1781.", "Sanamyan, K. (1998) Ascidians from the North-Western Pacific region. 4. Polyclinidae and Placentelidae. Ophelia, 48 (2), 103 - 135."]} |
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Text |
author |
Sanamyan, Karen Sanamyan, Nadya |
author_facet |
Sanamyan, Karen Sanamyan, Nadya |
author_sort |
Sanamyan, Karen |
title |
Ascidia callosa Stimpson 1852 |
title_short |
Ascidia callosa Stimpson 1852 |
title_full |
Ascidia callosa Stimpson 1852 |
title_fullStr |
Ascidia callosa Stimpson 1852 |
title_full_unstemmed |
Ascidia callosa Stimpson 1852 |
title_sort |
ascidia callosa stimpson 1852 |
publisher |
Zenodo |
publishDate |
2017 |
url |
https://dx.doi.org/10.5281/zenodo.6049270 https://zenodo.org/record/6049270 |
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Pacific |
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Pacific |
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Kamchatka Alaska |
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Kamchatka Alaska |
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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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ftdatacite:10.5281/zenodo.6049270 2023-05-15T16:59:33+02:00 Ascidia callosa Stimpson 1852 Sanamyan, Karen Sanamyan, Nadya 2017 https://dx.doi.org/10.5281/zenodo.6049270 https://zenodo.org/record/6049270 unknown Zenodo http://zenodo.org/record/293689 http://publication.plazi.org/id/303EFFC4FFD107036E49FFB8FFCDEF66 http://zoobank.org/F8F512BA-DD07-467E-B3C1-840155C70692 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4232.3.1 http://zenodo.org/record/293689 http://publication.plazi.org/id/303EFFC4FFD107036E49FFB8FFCDEF66 https://dx.doi.org/10.5281/zenodo.312167 http://zoobank.org/F8F512BA-DD07-467E-B3C1-840155C70692 https://dx.doi.org/10.5281/zenodo.6049269 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 Animalia Chordata Ascidiacea Enterogona Ascidiidae Ascidia Ascidia callosa article-journal ScholarlyArticle Taxonomic treatment Text 2017 ftdatacite https://doi.org/10.5281/zenodo.6049270 https://doi.org/10.11646/zootaxa.4232.3.1 https://doi.org/10.5281/zenodo.312167 https://doi.org/10.5281/zenodo.6049269 2022-04-01T09:57:43Z Ascidia callosa Stimpson, 1852 (Figure 2) Ascidia callosa Stimpson, 1852: 228. Lambert & Sanamyan, 2001: 1772 (synonymy). Material examined. Matua Island, Point Kluv, 16 m, one specimen (#177). Description. The single collected specimen is small, about 10 mm long, attached by a whole left side (Figure 2 A). The test is thick and soft, semitransparent, the body is clearly visible through it. Its surface in preservative is finely wrinkled, almost smooth, covered by filamentous diatoms, giving an impression of test hairs, but actually neither test hairs, nor papillae are present. The body removed from the test is oval in outline, with the terminal branchial siphon and the atrial siphon placed in one-third of the body length distant from it along the dorsal side. The muscles form an irregular dense network on the right side of the body but absent on the left. The branchial tentacles are not numerous, about 17, in two size ranges. Prepharyngeal band is composed of two blades, it forms very shallow, almost not discernible V around minute dorsal tubercle, which is hard to detect. The branchial sac has 18 internal longitudinal vessels on the right and 16 on the left (Figure 2 D). Intermediate branchial papillae are present but not everywhere. The dorsal lamina is high. The transverse branchial vessels continue to the dorsal lamina and project from its rim, giving it a ribbed appearance. The visceral mass occupies most part of the left side. The stomach is short, oval, located at postero-ventral part of the body. Voluminous intestine makes narrow closed loop along the whole ventral mid line, its pole is located almost behind the branchial siphon. The secondary loop is also narrow and closed. The rectum is straight, not long, and the anus is bi-lobed, with a plain margin. The ovary consist of a main tubule, running in the primary gut loop along its axis, and numerous, mostly perpendicular side branches spread over ascending and descending limbs of the gut loop (Figure 2 C). Whole visceral mass is covered by numerous renal vesicles. Remarks. Ascidia callosa is a single species of the family Ascidiidae occurring in diver-accessible depths (down to about 40 m) in a wide NW Pacific region from Commander Islands, through Kamchatka waters, where it is quite common, to at least central Kuril Islands. In NE Pacific, at Alaska coasts, A. callosa coexists with a similar, but distinct species A. columbiana (Huntsman, 1912) (see Lambert & Sanamyan, 2001). Sanamyan (1998) reported Ascidia prunum Muller, 1776 from north Kuril Islands, but these specimens come from greater depths (118–370 m). The identity of that material needs confirmation but it is certainly not conspecific with A. callosa having much more internal longitudinal branchial vessels. : Published as part of Sanamyan, Karen & Sanamyan, Nadya, 2017, Shallow-water Ascidians from Matua Island (central Kuril Islands, NW Pacific), pp. 301-321 in Zootaxa 4232 (3) on pages 302-303, DOI: 10.11646/zootaxa.4232.3.1, http://zenodo.org/record/293689 : {"references": ["Stimpson, W. (1852) Several new ascidians from the coast of the United States. Proceedings of the Boston Society of Natural History, 4, 228 - 232.", "Lambert, G. & Sanamyan, K. (2001) Distaplia alaskensis sp. nov. (Ascidiacea, Aplousobranchia) and other new ascidian records from south-central Alaska, with a redescription of Ascidia columbiana (Huntsman, 1912). Canadian Journal of Zoology, 79, 1766 - 1781.", "Sanamyan, K. (1998) Ascidians from the North-Western Pacific region. 4. Polyclinidae and Placentelidae. Ophelia, 48 (2), 103 - 135."]} Text Kamchatka Alaska DataCite Metadata Store (German National Library of Science and Technology) Pacific |