Styela squamosa Herdman 1881
Styela squamosa Herdman, 1881 References and synonymy : Styela squamosa Herdman 1881: 66; Sanamyan & Sanamyan 2006: 321, figs. 7–9 (synonymy); 2012: 67, fig. 3. Material examined : One individual; trawl; -37.9651 lat. -54.5320 long. (station 10); 1144 m; 11 August 2012 (Figure 12). The specimen...
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Online Access: | https://dx.doi.org/10.5281/zenodo.5995354 https://zenodo.org/record/5995354 |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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unknown |
topic |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Stolidobranchia Styelidae Styela Styela squamosa |
spellingShingle |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Stolidobranchia Styelidae Styela Styela squamosa Maggioni, Tamara Taverna, Anabela Reyna, Paola B. Alurralde, Gastón Rimondino, Clara Tatián, Marcos Styela squamosa Herdman 1881 |
topic_facet |
Biodiversity Taxonomy Animalia Chordata Ascidiacea Stolidobranchia Styelidae Styela Styela squamosa |
description |
Styela squamosa Herdman, 1881 References and synonymy : Styela squamosa Herdman 1881: 66; Sanamyan & Sanamyan 2006: 321, figs. 7–9 (synonymy); 2012: 67, fig. 3. Material examined : One individual; trawl; -37.9651 lat. -54.5320 long. (station 10); 1144 m; 11 August 2012 (Figure 12). The specimen measures 1.9 cm high and 1.2 cm wide. It was found completely covered by a thick and tough layer of sediment, with rests of sand and pebbles (Fig. 12). There are 18 oral tentacles disposed on the margin of an oral velum. The muscle fibers are densely packed and equally distributed on both sides. The branchial sac has four well developed folds on each side. Thin parastigmatic vessels are present. The stomach presents 24 well-marked folds and bears a small straight pyloric caecum. The border of the anus is triangular and ends near the atrial opening. There is one sinuously curved gonad on each side. The ovary is long and narrow. The small testicular follicles are placed around the distal part of each ovary. Numerous endocarps are distributed on both sides of the body. Remarks. Styela squamosa has been described from most ocean basins in the world, except from the North Atlantic and Indian Oceans, at depths ranging from 165 to 5000 m. This data permits to classify S. squamosa as an eurybathic and cosmopolitan deep-sea species (Monniot C. 1993). There is, though, some degree of character variation that falls into the range of standard intra-specific variability. Our specimen encountered off La Plata River (SW Atlantic), is closest to the description made by Sanamyan (1992) of a few individuals from the Sea of Okhotsk (NW Pacific) in relation to the shape of the border of the anus. While previous descriptions state that the border of the anus is bilobed, Sanamyan´s specimens as well as ours, present a triangular border. The only difference between our specimen and all the rest resides in the number of oral tentacles: 18 in ours and around 30 in the rest. : Published as part of Maggioni, Tamara, Taverna, Anabela, Reyna, Paola B., Alurralde, Gastón, Rimondino, Clara & Tatián, Marcos, 2018, Deep-sea ascidians (Chordata, Tunicata) from the SW Atlantic: species richness with descriptions of two new species, pp. 1-28 in Zootaxa 4526 (1) on page 20, DOI: 10.11646/zootaxa.4526.1.1, http://zenodo.org/record/2611359 : {"references": ["Herdman, W. A. (1881) Preliminary report on the Tunicata of the Challenger Expedition. Part III. Cynthidae. Proceedings of the Royal Society of Edinburgh, 11 (3), 52 - 58.", "Sanamyan, K. E. & Sanamyan, N. P. (2006) Deep-water ascidians (Tunicata: Ascidiacea) from the northern and western Pacific. Journal of Natural History, 40 (5 - 6), 307 - 344. https: // doi. org / 10.1080 / 00222930600628416", "Monniot, C. (1993) Tunicata: sur trois especes d'ascidies bathyales recoltees au cours de la campagne franco-indonesienne Karubar. In: Crosnier, A. (Ed.), Resultats des Campagnes Musorstom, 11, pp. 255 - 359.", "Sanamyan, K. E. (1992) Ascidians from the sea of Okhotsk collected by R. V. \" Novoulyanovsk \". Ophelia, 36 (3), 187 - 194. https: // doi. org / 10.1080 / 00785326.1992.10430369"]} |
format |
Text |
author |
Maggioni, Tamara Taverna, Anabela Reyna, Paola B. Alurralde, Gastón Rimondino, Clara Tatián, Marcos |
author_facet |
Maggioni, Tamara Taverna, Anabela Reyna, Paola B. Alurralde, Gastón Rimondino, Clara Tatián, Marcos |
author_sort |
Maggioni, Tamara |
title |
Styela squamosa Herdman 1881 |
title_short |
Styela squamosa Herdman 1881 |
title_full |
Styela squamosa Herdman 1881 |
title_fullStr |
Styela squamosa Herdman 1881 |
title_full_unstemmed |
Styela squamosa Herdman 1881 |
title_sort |
styela squamosa herdman 1881 |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://dx.doi.org/10.5281/zenodo.5995354 https://zenodo.org/record/5995354 |
long_lat |
ENVELOPE(-61.833,-61.833,-64.500,-64.500) ENVELOPE(-60.526,-60.526,-72.655,-72.655) |
geographic |
Okhotsk Pacific Indian Marcos Herdman |
geographic_facet |
Okhotsk Pacific Indian Marcos Herdman |
genre |
North Atlantic |
genre_facet |
North Atlantic |
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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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https://doi.org/10.5281/zenodo.5995354 https://doi.org/10.11646/zootaxa.4526.1.1 https://doi.org/10.5281/zenodo.2611385 https://doi.org/10.5281/zenodo.5995353 |
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ftdatacite:10.5281/zenodo.5995354 2023-05-15T17:37:23+02:00 Styela squamosa Herdman 1881 Maggioni, Tamara Taverna, Anabela Reyna, Paola B. Alurralde, Gastón Rimondino, Clara Tatián, Marcos 2018 https://dx.doi.org/10.5281/zenodo.5995354 https://zenodo.org/record/5995354 unknown Zenodo http://zenodo.org/record/2611359 http://publication.plazi.org/id/5C4FE40D7579FFA50B2135631216313A http://zoobank.org/028FC5EA-7123-4F3A-B6C4-5EBE57ADBE23 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4526.1.1 http://zenodo.org/record/2611359 http://publication.plazi.org/id/5C4FE40D7579FFA50B2135631216313A https://dx.doi.org/10.5281/zenodo.2611385 http://zoobank.org/028FC5EA-7123-4F3A-B6C4-5EBE57ADBE23 https://dx.doi.org/10.5281/zenodo.5995353 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 Stolidobranchia Styelidae Styela Styela squamosa article-journal ScholarlyArticle Taxonomic treatment Text 2018 ftdatacite https://doi.org/10.5281/zenodo.5995354 https://doi.org/10.11646/zootaxa.4526.1.1 https://doi.org/10.5281/zenodo.2611385 https://doi.org/10.5281/zenodo.5995353 2022-04-01T09:02:10Z Styela squamosa Herdman, 1881 References and synonymy : Styela squamosa Herdman 1881: 66; Sanamyan & Sanamyan 2006: 321, figs. 7–9 (synonymy); 2012: 67, fig. 3. Material examined : One individual; trawl; -37.9651 lat. -54.5320 long. (station 10); 1144 m; 11 August 2012 (Figure 12). The specimen measures 1.9 cm high and 1.2 cm wide. It was found completely covered by a thick and tough layer of sediment, with rests of sand and pebbles (Fig. 12). There are 18 oral tentacles disposed on the margin of an oral velum. The muscle fibers are densely packed and equally distributed on both sides. The branchial sac has four well developed folds on each side. Thin parastigmatic vessels are present. The stomach presents 24 well-marked folds and bears a small straight pyloric caecum. The border of the anus is triangular and ends near the atrial opening. There is one sinuously curved gonad on each side. The ovary is long and narrow. The small testicular follicles are placed around the distal part of each ovary. Numerous endocarps are distributed on both sides of the body. Remarks. Styela squamosa has been described from most ocean basins in the world, except from the North Atlantic and Indian Oceans, at depths ranging from 165 to 5000 m. This data permits to classify S. squamosa as an eurybathic and cosmopolitan deep-sea species (Monniot C. 1993). There is, though, some degree of character variation that falls into the range of standard intra-specific variability. Our specimen encountered off La Plata River (SW Atlantic), is closest to the description made by Sanamyan (1992) of a few individuals from the Sea of Okhotsk (NW Pacific) in relation to the shape of the border of the anus. While previous descriptions state that the border of the anus is bilobed, Sanamyan´s specimens as well as ours, present a triangular border. The only difference between our specimen and all the rest resides in the number of oral tentacles: 18 in ours and around 30 in the rest. : Published as part of Maggioni, Tamara, Taverna, Anabela, Reyna, Paola B., Alurralde, Gastón, Rimondino, Clara & Tatián, Marcos, 2018, Deep-sea ascidians (Chordata, Tunicata) from the SW Atlantic: species richness with descriptions of two new species, pp. 1-28 in Zootaxa 4526 (1) on page 20, DOI: 10.11646/zootaxa.4526.1.1, http://zenodo.org/record/2611359 : {"references": ["Herdman, W. A. (1881) Preliminary report on the Tunicata of the Challenger Expedition. Part III. Cynthidae. Proceedings of the Royal Society of Edinburgh, 11 (3), 52 - 58.", "Sanamyan, K. E. & Sanamyan, N. P. (2006) Deep-water ascidians (Tunicata: Ascidiacea) from the northern and western Pacific. Journal of Natural History, 40 (5 - 6), 307 - 344. https: // doi. org / 10.1080 / 00222930600628416", "Monniot, C. (1993) Tunicata: sur trois especes d'ascidies bathyales recoltees au cours de la campagne franco-indonesienne Karubar. In: Crosnier, A. (Ed.), Resultats des Campagnes Musorstom, 11, pp. 255 - 359.", "Sanamyan, K. E. (1992) Ascidians from the sea of Okhotsk collected by R. V. \" Novoulyanovsk \". Ophelia, 36 (3), 187 - 194. https: // doi. org / 10.1080 / 00785326.1992.10430369"]} Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Okhotsk Pacific Indian Marcos ENVELOPE(-61.833,-61.833,-64.500,-64.500) Herdman ENVELOPE(-60.526,-60.526,-72.655,-72.655) |