Polysyncraton trivolutum Millar 1960
Polysyncraton trivolutum (Millar, 1960) Fig. 3 C,D,G References and synonymy: Polysyncraton trivolutum Millar (1960) p. 58; Monniot & Monniot (1983) p. 43; Monniot et al. (2011) p. 10. Localities: 5S. This species forms crusts several cm across and 4–5 mm thick. The colour is white with a browni...
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ftzenodo:oai:zenodo.org:5630306 2024-09-15T17:42:02+00:00 Polysyncraton trivolutum Millar 1960 Turon, Xavier Cañete, Juan I. Sellanes, Javier Rocha, Rosana M. López-Legentil, Susanna 2016-12-31 https://doi.org/10.5281/zenodo.5630306 http://treatment.plazi.org/id/03C88E54FF9EFFB4FF77B586FBEB36DC unknown Zenodo https://doi.org/10.11646/zootaxa.4093.2.1 http://zenodo.org/record/267667 http://publication.plazi.org/id/FFF1F62CFF99FFB3FFE0B677FFED3076 https://sibils.text-analytics.ch/search/collections/plazi/03C88E54FF9EFFB4FF77B586FBEB36DC https://doi.org/10.5281/zenodo.267670 http://zoobank.org/ECC66298-6885-47B3-B797-8D30AA05927F https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.5630305 https://doi.org/10.5281/zenodo.5630306 oai:zenodo.org:5630306 http://treatment.plazi.org/id/03C88E54FF9EFFB4FF77B586FBEB36DC info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Ascidian fauna (Tunicata, Ascidiacea) of subantarctic and temperate regions of Chile, pp. 151-180 in Zootaxa, 4093(2), 158, (2016-12-31) Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Didemnidae Polysyncraton Polysyncraton trivolutum info:eu-repo/semantics/other 2016 ftzenodo https://doi.org/10.5281/zenodo.563030610.11646/zootaxa.4093.2.110.5281/zenodo.26767010.5281/zenodo.5630305 2024-07-26T00:22:05Z Polysyncraton trivolutum (Millar, 1960) Fig. 3 C,D,G References and synonymy: Polysyncraton trivolutum Millar (1960) p. 58; Monniot & Monniot (1983) p. 43; Monniot et al. (2011) p. 10. Localities: 5S. This species forms crusts several cm across and 4–5 mm thick. The colour is white with a brownish tinge. The spicules are dense, in general less than 25 µm in diameter (occasionally reaching 40). They are stellate with short rays, up to ten in optical section. The general cavity of the colony is at the thoracic level, but it extends between groups of abdomina. The thoraces reach 2 mm in length. They have an atrial languet that ranges from very small and simple to long and with several points. Cup-like thoracic organs are prominent between the second and third row of stigmata. No retractor muscle is present. The abdomina are smaller than the thoraces, and are in general in male phase. They have three testicular lobes surrounded by a sperm duct describing four coils. Some zooids also have a few developing oocytes adjacent to the testes. Remarks. the presence of atrial languet, absence of retractor muscle, structure of thoracic organs and gonads allows the assignment of our specimens to this species. However, P. trivolutum is highly variable and may comprise a group of closely related species (Monniot & Monniot 1983). This taxon is common in Antarctic and subantarctic regions (Monniot & Monniot 1983, Monniot et al. 2011, Schories et al. 2015). Published as part of Turon, Xavier, Cañete, Juan I., Sellanes, Javier, Rocha, Rosana M. & López-Legentil, Susanna, 2016, Ascidian fauna (Tunicata, Ascidiacea) of subantarctic and temperate regions of Chile, pp. 151-180 in Zootaxa 4093 (2) on page 158, DOI:10.11646/zootaxa.4093.2.1, http://zenodo.org/record/267667 Other/Unknown Material Antarc* Antarctic Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Didemnidae Polysyncraton Polysyncraton trivolutum |
spellingShingle |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Didemnidae Polysyncraton Polysyncraton trivolutum Turon, Xavier Cañete, Juan I. Sellanes, Javier Rocha, Rosana M. López-Legentil, Susanna Polysyncraton trivolutum Millar 1960 |
topic_facet |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Enterogona Didemnidae Polysyncraton Polysyncraton trivolutum |
description |
Polysyncraton trivolutum (Millar, 1960) Fig. 3 C,D,G References and synonymy: Polysyncraton trivolutum Millar (1960) p. 58; Monniot & Monniot (1983) p. 43; Monniot et al. (2011) p. 10. Localities: 5S. This species forms crusts several cm across and 4–5 mm thick. The colour is white with a brownish tinge. The spicules are dense, in general less than 25 µm in diameter (occasionally reaching 40). They are stellate with short rays, up to ten in optical section. The general cavity of the colony is at the thoracic level, but it extends between groups of abdomina. The thoraces reach 2 mm in length. They have an atrial languet that ranges from very small and simple to long and with several points. Cup-like thoracic organs are prominent between the second and third row of stigmata. No retractor muscle is present. The abdomina are smaller than the thoraces, and are in general in male phase. They have three testicular lobes surrounded by a sperm duct describing four coils. Some zooids also have a few developing oocytes adjacent to the testes. Remarks. the presence of atrial languet, absence of retractor muscle, structure of thoracic organs and gonads allows the assignment of our specimens to this species. However, P. trivolutum is highly variable and may comprise a group of closely related species (Monniot & Monniot 1983). This taxon is common in Antarctic and subantarctic regions (Monniot & Monniot 1983, Monniot et al. 2011, Schories et al. 2015). Published as part of Turon, Xavier, Cañete, Juan I., Sellanes, Javier, Rocha, Rosana M. & López-Legentil, Susanna, 2016, Ascidian fauna (Tunicata, Ascidiacea) of subantarctic and temperate regions of Chile, pp. 151-180 in Zootaxa 4093 (2) on page 158, DOI:10.11646/zootaxa.4093.2.1, http://zenodo.org/record/267667 |
format |
Other/Unknown Material |
author |
Turon, Xavier Cañete, Juan I. Sellanes, Javier Rocha, Rosana M. López-Legentil, Susanna |
author_facet |
Turon, Xavier Cañete, Juan I. Sellanes, Javier Rocha, Rosana M. López-Legentil, Susanna |
author_sort |
Turon, Xavier |
title |
Polysyncraton trivolutum Millar 1960 |
title_short |
Polysyncraton trivolutum Millar 1960 |
title_full |
Polysyncraton trivolutum Millar 1960 |
title_fullStr |
Polysyncraton trivolutum Millar 1960 |
title_full_unstemmed |
Polysyncraton trivolutum Millar 1960 |
title_sort |
polysyncraton trivolutum millar 1960 |
publisher |
Zenodo |
publishDate |
2016 |
url |
https://doi.org/10.5281/zenodo.5630306 http://treatment.plazi.org/id/03C88E54FF9EFFB4FF77B586FBEB36DC |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Ascidian fauna (Tunicata, Ascidiacea) of subantarctic and temperate regions of Chile, pp. 151-180 in Zootaxa, 4093(2), 158, (2016-12-31) |
op_relation |
https://doi.org/10.11646/zootaxa.4093.2.1 http://zenodo.org/record/267667 http://publication.plazi.org/id/FFF1F62CFF99FFB3FFE0B677FFED3076 https://sibils.text-analytics.ch/search/collections/plazi/03C88E54FF9EFFB4FF77B586FBEB36DC https://doi.org/10.5281/zenodo.267670 http://zoobank.org/ECC66298-6885-47B3-B797-8D30AA05927F https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.5630305 https://doi.org/10.5281/zenodo.5630306 oai:zenodo.org:5630306 http://treatment.plazi.org/id/03C88E54FF9EFFB4FF77B586FBEB36DC |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.563030610.11646/zootaxa.4093.2.110.5281/zenodo.26767010.5281/zenodo.5630305 |
_version_ |
1810488371535937536 |