Halecium pallens Jaderholm 1904
Halecium pallens Jäderholm, 1904 (Fig. 4 G) Halecium pallens — Galea & Schories, 2012 a: 36, pl. 3 A, B, Fig. 3 G–M.— Peña Cantero, 2014: 266, Fig. 3 E–K. Material examined. Punta Arenas, lat. -53.75000, long. - 70.96667, 07.i.2011, 15 m, sample S08: a single colony, 10.5 cm high, bearing female...
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Online Access: | https://dx.doi.org/10.5281/zenodo.3511607 https://zenodo.org/record/3511607 |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium pallens |
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Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium pallens Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena Halecium pallens Jaderholm 1904 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium pallens |
description |
Halecium pallens Jäderholm, 1904 (Fig. 4 G) Halecium pallens — Galea & Schories, 2012 a: 36, pl. 3 A, B, Fig. 3 G–M.— Peña Cantero, 2014: 266, Fig. 3 E–K. Material examined. Punta Arenas, lat. -53.75000, long. - 70.96667, 07.i.2011, 15 m, sample S08: a single colony, 10.5 cm high, bearing female gonothecae with acrocysts, as well as fragments from that colony (MHNG-INVE- 79619). Remarks . In a recent paper, Peña Cantero (2014) questioned the identity of a hydroid previously assigned to H. pallens by two of us (Galea & Schories 2012 a). This prompted us to reexamine our material with female gonothecae (part of MHNG-INVE- 79619), in order to compare it with the redescription of the holotype. After careful examination, we found that a short, terminal funnel could be noted in certain gonothecae whose acrocysts were removed manually (Fig. 4 G), while a wide open aperture is present in others. In the first case, it appears that a thin, outer layer of the apical perisarc of the gonotheca is ruptured, while the terminal funnel is attached to the remaining, inner layer. In the second situation, it seems that the gonothecae are in a more advanced stage of maturation of their acrocysts, the latter likely contributing to the disappearance of the apical perisarc, possibly through biochemical digestion, leaving a wide open aperture. The size of the gonothecae in our material [(1575–1705) × (620–815) µm] does not differ much from that of the holotype, as described by Peña Cantero. Taken together, the features of the female gonotheca demonstrate that our earlier identification is correct. Two additional points invoked by Peña Cantero, viz . the absence of a pseudodiaphragm in the hydrophores and the lack of a crease line along the perimeter of the gonotheca are, in our opinion, of minor importance. As already stated by Galea & Schories (2012 a), the pseudodiaphragm was generally present, though inconstantly seen, among the rather abundant material from Chile. As for the crease line, this was observed only in the best preserved specimens that have not been submitted to osmotic shocks. : Published as part of Galea, Horia R., Schories, Dirk, Försterra, Günter & Häussermann, Verena, 2014, New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile, pp. 1-50 in Zootaxa 3852 (1) on page 23, DOI: 10.11646/zootaxa.3852.1.1, http://zenodo.org/record/286956 : {"references": ["Jaderholm, E. (1904) Mitteilungen ueber einige von der Schwedischen Antarctic-Expedition 1901 - 1903 eingesammelte Hydroiden. Archives de Zoologie Experimentale et Generale, 4 (3), 1 - 14.", "Galea, H. R. & Schories, D. (2012 a) Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan. Zootaxa, 3296, 19 - 67.", "Pena Cantero, A. L. (2014) Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae). Zootaxa, 3790 (2), 243 - 280. http: // dx. doi. org / 10.11646 / zootaxa. 3790.2.2"]} |
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Text |
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Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena |
author_facet |
Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena |
author_sort |
Galea, Horia R. |
title |
Halecium pallens Jaderholm 1904 |
title_short |
Halecium pallens Jaderholm 1904 |
title_full |
Halecium pallens Jaderholm 1904 |
title_fullStr |
Halecium pallens Jaderholm 1904 |
title_full_unstemmed |
Halecium pallens Jaderholm 1904 |
title_sort |
halecium pallens jaderholm 1904 |
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Zenodo |
publishDate |
2014 |
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https://dx.doi.org/10.5281/zenodo.3511607 https://zenodo.org/record/3511607 |
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ENVELOPE(40.562,40.562,63.490,63.490) |
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Antarctic Pena The Antarctic |
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Antarctic Pena The Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
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ftdatacite:10.5281/zenodo.3511607 2023-05-15T13:51:38+02:00 Halecium pallens Jaderholm 1904 Galea, Horia R. Schories, Dirk Försterra, Günter Häussermann, Verena 2014 https://dx.doi.org/10.5281/zenodo.3511607 https://zenodo.org/record/3511607 unknown Zenodo http://zenodo.org/record/286956 http://publication.plazi.org/id/FFE052544768FFD8FFC68437590FA657 http://treatment.plazi.org/id/0382D51C9F4CFFEFFF5A26CFFCF66726 http://zoobank.org/7DE3BCBA-E5F0-4F0D-B2FD-B5B59E4DAE51 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3852.1.1 http://zenodo.org/record/286956 http://publication.plazi.org/id/FFE052544768FFD8FFC68437590FA657 https://dx.doi.org/10.5281/zenodo.286959 https://dx.doi.org/10.5281/zenodo.3506893 http://treatment.plazi.org/id/0382D51C9F4CFFEFFF5A26CFFCF66726 http://zoobank.org/7DE3BCBA-E5F0-4F0D-B2FD-B5B59E4DAE51 https://dx.doi.org/10.5281/zenodo.3511606 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 Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium pallens article-journal ScholarlyArticle Text Taxonomic treatment 2014 ftdatacite https://doi.org/10.5281/zenodo.3511607 https://doi.org/10.11646/zootaxa.3852.1.1 https://doi.org/10.5281/zenodo.286959 https://doi.org/10.5281/zenodo.3506893 https://doi.org/10.5281/zenodo.3511606 2022-03-10T13:11:14Z Halecium pallens Jäderholm, 1904 (Fig. 4 G) Halecium pallens — Galea & Schories, 2012 a: 36, pl. 3 A, B, Fig. 3 G–M.— Peña Cantero, 2014: 266, Fig. 3 E–K. Material examined. Punta Arenas, lat. -53.75000, long. - 70.96667, 07.i.2011, 15 m, sample S08: a single colony, 10.5 cm high, bearing female gonothecae with acrocysts, as well as fragments from that colony (MHNG-INVE- 79619). Remarks . In a recent paper, Peña Cantero (2014) questioned the identity of a hydroid previously assigned to H. pallens by two of us (Galea & Schories 2012 a). This prompted us to reexamine our material with female gonothecae (part of MHNG-INVE- 79619), in order to compare it with the redescription of the holotype. After careful examination, we found that a short, terminal funnel could be noted in certain gonothecae whose acrocysts were removed manually (Fig. 4 G), while a wide open aperture is present in others. In the first case, it appears that a thin, outer layer of the apical perisarc of the gonotheca is ruptured, while the terminal funnel is attached to the remaining, inner layer. In the second situation, it seems that the gonothecae are in a more advanced stage of maturation of their acrocysts, the latter likely contributing to the disappearance of the apical perisarc, possibly through biochemical digestion, leaving a wide open aperture. The size of the gonothecae in our material [(1575–1705) × (620–815) µm] does not differ much from that of the holotype, as described by Peña Cantero. Taken together, the features of the female gonotheca demonstrate that our earlier identification is correct. Two additional points invoked by Peña Cantero, viz . the absence of a pseudodiaphragm in the hydrophores and the lack of a crease line along the perimeter of the gonotheca are, in our opinion, of minor importance. As already stated by Galea & Schories (2012 a), the pseudodiaphragm was generally present, though inconstantly seen, among the rather abundant material from Chile. As for the crease line, this was observed only in the best preserved specimens that have not been submitted to osmotic shocks. : Published as part of Galea, Horia R., Schories, Dirk, Försterra, Günter & Häussermann, Verena, 2014, New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile, pp. 1-50 in Zootaxa 3852 (1) on page 23, DOI: 10.11646/zootaxa.3852.1.1, http://zenodo.org/record/286956 : {"references": ["Jaderholm, E. (1904) Mitteilungen ueber einige von der Schwedischen Antarctic-Expedition 1901 - 1903 eingesammelte Hydroiden. Archives de Zoologie Experimentale et Generale, 4 (3), 1 - 14.", "Galea, H. R. & Schories, D. (2012 a) Some hydrozoans (Cnidaria) from Central Chile and the Strait of Magellan. Zootaxa, 3296, 19 - 67.", "Pena Cantero, A. L. (2014) Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae). Zootaxa, 3790 (2), 243 - 280. http: // dx. doi. org / 10.11646 / zootaxa. 3790.2.2"]} Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Pena ENVELOPE(40.562,40.562,63.490,63.490) The Antarctic |