Placentela crystallina Redikorzev 1913
Placentela crystallina Redikorzev, 1913 (Figure 8) Placentela crystallina Redikorzev, 1913: 212. Nishikawa, 1984: 39. Sanamyan, 1998: 134. Homoedistoma michaelseni Redikorzev, 1927: 376. Material examined. Matua Island, Point Kluv, 16–17 m, collected at 25– 28.08.2016, three colonies (#153, 160, 169...
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ftzenodo:oai:zenodo.org:6049280 2023-05-15T16:59:29+02:00 Placentela crystallina Redikorzev 1913 Sanamyan, Karen Sanamyan, Nadya 2017-12-31 https://zenodo.org/record/6049280 https://doi.org/10.5281/zenodo.6049280 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/CC0787BCFFD807086EDEF9ACFC3EEECB doi:10.11646/zootaxa.4232.3.1 http://zenodo.org/record/293689 http://publication.plazi.org/id/303EFFC4FFD107036E49FFB8FFCDEF66 doi:10.5281/zenodo.293696 http://zoobank.org/F8F512BA-DD07-467E-B3C1-840155C70692 doi:10.5281/zenodo.6049279 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6049280 https://doi.org/10.5281/zenodo.6049280 oai:zenodo.org:6049280 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Shallow-water Ascidians from Matua Island (central Kuril Islands, NW Pacific), pp. 301-321 in Zootaxa 4232(3) 310-312 Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Polyclinidae Placentela Placentela crystallina info:eu-repo/semantics/other publication-taxonomictreatment 2017 ftzenodo https://doi.org/10.5281/zenodo.604928010.11646/zootaxa.4232.3.110.5281/zenodo.29369610.5281/zenodo.6049279 2023-03-10T17:56:42Z Placentela crystallina Redikorzev, 1913 (Figure 8) Placentela crystallina Redikorzev, 1913: 212. Nishikawa, 1984: 39. Sanamyan, 1998: 134. Homoedistoma michaelseni Redikorzev, 1927: 376. Material examined. Matua Island, Point Kluv, 16–17 m, collected at 25– 28.08.2016, three colonies (#153, 160, 169). Description. All colonies are small, the largest is 3 cm long, and all are represented by a single head on rather high peduncle and contain from two to five zooids only. The most conspicuous part of colony is a transparent head containing thoraces of the zooids. In the head the zooids are oriented in such a way, that their branchial openings open on the sides of the head and the atrial openings open independently from each other closer to the top of the head (Figure 8 B). The atrial openings have six equal prominent round lobes, the branchial openings also have six lobes, but the dorsal lobe is larger than other, which are low. The zooids are large and characteristic for this species. They have wide, but relatively short branchial sac with 10 rows of stigmata and about 40 stigmata per row on each side. The abdomen is very long, the stomach is in its posterior end which is filled by parenchymatous tissue. The postabdomen and gonads not present in the material examined, however several zooids contained larvae attached to a placental membrane in the right side of the thorax (Figure 8 C, D). The fully developed larva has a trunk 1.1 mm long. It has thee adhesive organs arranged in a vertical row and has no vesicles or ampullae (Figure 8 E). Remarks. In the Sea of Okhotsk and in Kamchatka waters this species may form large, 20 cm and more, heavily branching, tree-like colonies, but all specimens recorded in Matua Island are very small, although some contain fully developed larvae. The genus Homoedistoma Redikorzev, 1927 is a synonym, its type species, H. michaelseni Redikorzev, 1927 is conspecific with Placentela crystallina (see Sanamyan, 1993, type revision). Published as part of Sanamyan, Karen & Sanamyan, ... Other/Unknown Material Kamchatka Zenodo Okhotsk |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Polyclinidae Placentela Placentela crystallina |
spellingShingle |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Polyclinidae Placentela Placentela crystallina Sanamyan, Karen Sanamyan, Nadya Placentela crystallina Redikorzev 1913 |
topic_facet |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Polyclinidae Placentela Placentela crystallina |
description |
Placentela crystallina Redikorzev, 1913 (Figure 8) Placentela crystallina Redikorzev, 1913: 212. Nishikawa, 1984: 39. Sanamyan, 1998: 134. Homoedistoma michaelseni Redikorzev, 1927: 376. Material examined. Matua Island, Point Kluv, 16–17 m, collected at 25– 28.08.2016, three colonies (#153, 160, 169). Description. All colonies are small, the largest is 3 cm long, and all are represented by a single head on rather high peduncle and contain from two to five zooids only. The most conspicuous part of colony is a transparent head containing thoraces of the zooids. In the head the zooids are oriented in such a way, that their branchial openings open on the sides of the head and the atrial openings open independently from each other closer to the top of the head (Figure 8 B). The atrial openings have six equal prominent round lobes, the branchial openings also have six lobes, but the dorsal lobe is larger than other, which are low. The zooids are large and characteristic for this species. They have wide, but relatively short branchial sac with 10 rows of stigmata and about 40 stigmata per row on each side. The abdomen is very long, the stomach is in its posterior end which is filled by parenchymatous tissue. The postabdomen and gonads not present in the material examined, however several zooids contained larvae attached to a placental membrane in the right side of the thorax (Figure 8 C, D). The fully developed larva has a trunk 1.1 mm long. It has thee adhesive organs arranged in a vertical row and has no vesicles or ampullae (Figure 8 E). Remarks. In the Sea of Okhotsk and in Kamchatka waters this species may form large, 20 cm and more, heavily branching, tree-like colonies, but all specimens recorded in Matua Island are very small, although some contain fully developed larvae. The genus Homoedistoma Redikorzev, 1927 is a synonym, its type species, H. michaelseni Redikorzev, 1927 is conspecific with Placentela crystallina (see Sanamyan, 1993, type revision). Published as part of Sanamyan, Karen & Sanamyan, ... |
format |
Other/Unknown Material |
author |
Sanamyan, Karen Sanamyan, Nadya |
author_facet |
Sanamyan, Karen Sanamyan, Nadya |
author_sort |
Sanamyan, Karen |
title |
Placentela crystallina Redikorzev 1913 |
title_short |
Placentela crystallina Redikorzev 1913 |
title_full |
Placentela crystallina Redikorzev 1913 |
title_fullStr |
Placentela crystallina Redikorzev 1913 |
title_full_unstemmed |
Placentela crystallina Redikorzev 1913 |
title_sort |
placentela crystallina redikorzev 1913 |
publishDate |
2017 |
url |
https://zenodo.org/record/6049280 https://doi.org/10.5281/zenodo.6049280 |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Shallow-water Ascidians from Matua Island (central Kuril Islands, NW Pacific), pp. 301-321 in Zootaxa 4232(3) 310-312 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/CC0787BCFFD807086EDEF9ACFC3EEECB doi:10.11646/zootaxa.4232.3.1 http://zenodo.org/record/293689 http://publication.plazi.org/id/303EFFC4FFD107036E49FFB8FFCDEF66 doi:10.5281/zenodo.293696 http://zoobank.org/F8F512BA-DD07-467E-B3C1-840155C70692 doi:10.5281/zenodo.6049279 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6049280 https://doi.org/10.5281/zenodo.6049280 oai:zenodo.org:6049280 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.604928010.11646/zootaxa.4232.3.110.5281/zenodo.29369610.5281/zenodo.6049279 |
_version_ |
1766051776763527168 |