Halecium secundum Jaderholm 1904
Halecium secundum Jäderholm, 1904 (Fig. 4 D–F) Halecium secundum Jäderholm, 1904: iii–iv; 1905: 11–12, pl. 4 figs 4–7; Redier, 1971: 70; Stepanjants, 1979: 109, pl. 16 fig. 8; Blanco, 1994 a: 156; 1994 b: 187; Vervoort & Watson, 2003: 86; Peña Cantero, 2004: 769; Peña Cantero et al ., 2013: 747...
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Zenodo
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Online Access: | https://dx.doi.org/10.5281/zenodo.4630899 https://zenodo.org/record/4630899 |
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ftdatacite:10.5281/zenodo.4630899 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium secundum |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium secundum Peña Cantero, Álvaro L. Halecium secundum Jaderholm 1904 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium secundum |
description |
Halecium secundum Jäderholm, 1904 (Fig. 4 D–F) Halecium secundum Jäderholm, 1904: iii–iv; 1905: 11–12, pl. 4 figs 4–7; Redier, 1971: 70; Stepanjants, 1979: 109, pl. 16 fig. 8; Blanco, 1994 a: 156; 1994 b: 187; Vervoort & Watson, 2003: 86; Peña Cantero, 2004: 769; Peña Cantero et al ., 2013: 747 fig. 6 c. Material examined. Syntype, SMNH Type- 7948, Schwedischen Antarctic-Expedition 1901–1903 , Stn 5 , 64° 20 ’S 56 ° 38 ’W (SE of Seymour Island, Graham Region), four fragments up to 7 mm long. Diagnosis. Polysiphonic, irregularly branched stems, up to 25 mm high. Branches originating either from abcauline side of hydrophore of primary hydrotheca or from inside hydrotheca. Usually, with ahydrothecate intermediate internode after apophysis. Hydrothecae alternately arranged in either one or two planes. Hydrotheca at the end of short, adnate hydrophore. Hydrotheca very slightly widening distally; rim not everted. Adcauline hydrothecal wall free or adnate to internode. Hydrothecal aperture slightly directed downwards. No secondary hydrothecae present. Male gonotheca elongated, cylindrical, distally with a wide, shallow furrow, and proximally with a sharp keel. Female gonotheca unknown. Cnidome consisting of microbasic mastigophores? and microbasic euryteles? Description. Material studied consisting of four fragments up to 7 mm long; stems up to 25 mm according to Jäderholm (1904, 1905). Apparently, branching alternate. Longest fragment provided with four side-branches: first one originating from a primary hydrotheca through an apophysis and an intermediate, short, ahydrothecate internode before the first hydrothecate internode; the other three branches arising from the lateral of hydrophores. Seemingly, side-branches resting on large apophyses, frequently followed by an intermediate, short, ahydrothecate internode. Stem and branches divided by alternately arranged nodes into relatively short and wide internodes (Fig. 4 D–F). Hydrothecae alternately arranged, from more or less in one plane to about 90 °. Hydrothecae resting on adnate hydrophores (Fig. 4 D–F); ratio between adcauline length of hydrophore and diameter at diaphragm c. 0.5. Hydrotheca low, very slightly widening distally (Fig. 4 F). Adcauline hydrothecal wall usually adnate, sometimes free (Fig. 4 F). Hydrothecal aperture perpendicular to long axis of internode or slightly directed downwards (Fig. 4 D–F). Hydrotheca not surpassing distal node of internode. Coenosarc white. Measurements (in µm). Hydrothecae : diameter at aperture 210–220, diameter at diaphragm 190–215, height 30–45. Internodes : length 525–600, diameter at distal part 180–230. Cnidome : microbasic euryteles? with rounded ends [range 11–12 x 6–6.5, mean 11.7 ± 0.3 x 6.3 ± 0.2 (n= 10); ratio, range 1.7 –2.0, mean 1.9 ± 0.1 (n= 10)] and microbasic mastigophores? with sharp ends (6.5–7.5 x 2–3). Remarks. According to Jäderholm, the stem, c. 25 mm high, and the branches are stiff and polysiphonic (monosiphonic distally) and the branching is irregular in different planes. The female gonothecae are unknown, but there were male gonothecae, c. 1600 µm high and 320–360 µm wide, resting on very short pedicels. The gonotheca is elongated, cylindrical, weakly bent at distal part and provided with a wide, shallow furrow. It has a thin and high, very sharp keel in the proximal part. Halecium brevithecum is similar to H. secundum in the low hydrothecae, the cnidome and the branching. The branches originate either just below the hydrotheca or from inside it in both species. Moreover, there is usually an ahydrothecate internode following the apophysis. Concerning the cnidome, the larger nematocysts are apparently of the same range. Finally, both species also have low hydrothecae, although they are slightly higher in H. secundum . In addition, the adcauline wall is distinctly more developed and completely adnate to the internode in H. brevithecum (Fig. 4 A–C), whereas it is only slightly more developed and usually free in H. secundum (Fig. 4 D–F). Furthermore, as shown above, H. brevithecum is also characterized by the reddish stems, the distinctly longer first hydrothecate internode of the branches, and the more or less perpendicular arrangement of the lower-order branches in relation to the previous ones. Ecology and distribution. Halecium secundum has been found at depth between 40 (Peña Cantero et al . 2013) and 150 m (Jäderholm 1904), on sponges and bryozoans (Jäderholm 1904). Halecium secundum seems to have a circum-Antarctic distribution, recorded from off Seymour Island, Graham region (Jäderholm 1904), in West Antarctica, and from Tethys Bay, Ross Sea (Peña Cantero et al . 2013), in East Antarctica. However, it has also been reported in the Kerguélen area (Redier 1971). If this record was confirmed, H. secundum would have an Antarctic-Kerguélen distribution. : Published as part of Peña Cantero, Álvaro L., 2014, Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae), pp. 243-280 in Zootaxa 3790 (2) on pages 273-274, DOI: 10.11646/zootaxa.3790.2.2, http://zenodo.org/record/226890 : {"references": ["Jaderholm, E. (1904) Mitteilungen ueber einige von der Schwedischen Antarctic-Expedition 1901 - 1903 eingesammelte Hydroiden. Archives de Zoologie Experimentale et Generale, (4) 3 (Notes et revue 1), 1 - 14.", "Redier, L. (1971) Contribution a l'etude des hydraires et des bryozoaires de Kerguelen. In: Invertebres de l'infralittoral rocheux dans l'Archipel de Kerguelen. Comite national Francais des Recherches Antarctiques, 30, 67 - 88.", "Stepanjants, S. D. (1979) Hydroids of the antarctic and subantarctic waters. In: Biological results of the Soviet Antarctic Expedition, 6. Issledovaniya Fauny Morei, 20 (30), 1 - 200, pls 1 - 25. [in Russian]", "Blanco, O. M. (1994 a) Enumeracion sistematica y distribucion geografica preliminar de los Hydroida de la Republica Argentina suborden Athecata (Gymnoblastea, Anthomedusae), Thecata (Calyptoblastea, Leptomedusae) y Limnomedusae. Revista del Museo de La Plata (Zoologia), 14 (161), 181 - 216.", "Vervoort, W. & Watson, J. E. (2003) The Marine Fauna of New Zealand: Leptothecata (Cnidaria: Hydrozoa) (Thecate Hydroids). NIWA Biodiversity Memoir, 119, 1 - 538, figs. 1 - 108.", "Pena Cantero, A. L. (2004) How rich is the deep-sea Antarctic benthic hydroid fauna? Polar Biology, 27, 767 - 774. http: // dx. doi. org / 10.1007 / s 00300 - 004 - 0654 - 9", "Jaderholm, E. (1905) Hydroiden aus antarktischen und subantarktischen Meeren, gesammelt von der schwedischen Sudpolarexpedition. Wissenschaftliche Ergebnisse der Schwedischen Sudpolar-Expedition 1901 - 1903, 5 (8), 1 - 41, pls 1 - 14."]} |
format |
Text |
author |
Peña Cantero, Álvaro L. |
author_facet |
Peña Cantero, Álvaro L. |
author_sort |
Peña Cantero, Álvaro L. |
title |
Halecium secundum Jaderholm 1904 |
title_short |
Halecium secundum Jaderholm 1904 |
title_full |
Halecium secundum Jaderholm 1904 |
title_fullStr |
Halecium secundum Jaderholm 1904 |
title_full_unstemmed |
Halecium secundum Jaderholm 1904 |
title_sort |
halecium secundum jaderholm 1904 |
publisher |
Zenodo |
publishDate |
2014 |
url |
https://dx.doi.org/10.5281/zenodo.4630899 https://zenodo.org/record/4630899 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-55.233,-55.233,-61.250,-61.250) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(40.562,40.562,63.490,63.490) ENVELOPE(164.067,164.067,-74.683,-74.683) |
geographic |
Antarctic The Antarctic East Antarctica Ross Sea Kerguelen West Antarctica New Zealand Argentina Seymour Blanco Seymour Island Pena Tethys Bay |
geographic_facet |
Antarctic The Antarctic East Antarctica Ross Sea Kerguelen West Antarctica New Zealand Argentina Seymour Blanco Seymour Island Pena Tethys Bay |
genre |
Antarc* Antarctic Antarctica Antarctique* Antarktis* East Antarctica Ross Sea Seymour Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Antarctique* Antarktis* East Antarctica Ross Sea Seymour Island West Antarctica |
op_relation |
http://zenodo.org/record/226890 http://publication.plazi.org/id/C25BFF98294DFF8F2C3E185B3F31FFAC http://zoobank.org/BE6B199C-6E81-478A-8AC9-EB674B85FA35 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3790.2.2 http://zenodo.org/record/226890 http://publication.plazi.org/id/C25BFF98294DFF8F2C3E185B3F31FFAC https://dx.doi.org/10.5281/zenodo.226894 http://zoobank.org/BE6B199C-6E81-478A-8AC9-EB674B85FA35 https://dx.doi.org/10.5281/zenodo.4630898 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.4630899 https://doi.org/10.11646/zootaxa.3790.2.2 https://doi.org/10.5281/zenodo.226894 https://doi.org/10.5281/zenodo.4630898 |
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1766271808262111232 |
spelling |
ftdatacite:10.5281/zenodo.4630899 2023-05-15T14:01:46+02:00 Halecium secundum Jaderholm 1904 Peña Cantero, Álvaro L. 2014 https://dx.doi.org/10.5281/zenodo.4630899 https://zenodo.org/record/4630899 unknown Zenodo http://zenodo.org/record/226890 http://publication.plazi.org/id/C25BFF98294DFF8F2C3E185B3F31FFAC http://zoobank.org/BE6B199C-6E81-478A-8AC9-EB674B85FA35 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3790.2.2 http://zenodo.org/record/226890 http://publication.plazi.org/id/C25BFF98294DFF8F2C3E185B3F31FFAC https://dx.doi.org/10.5281/zenodo.226894 http://zoobank.org/BE6B199C-6E81-478A-8AC9-EB674B85FA35 https://dx.doi.org/10.5281/zenodo.4630898 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium secundum Taxonomic treatment article-journal Text ScholarlyArticle 2014 ftdatacite https://doi.org/10.5281/zenodo.4630899 https://doi.org/10.11646/zootaxa.3790.2.2 https://doi.org/10.5281/zenodo.226894 https://doi.org/10.5281/zenodo.4630898 2022-02-08T13:29:49Z Halecium secundum Jäderholm, 1904 (Fig. 4 D–F) Halecium secundum Jäderholm, 1904: iii–iv; 1905: 11–12, pl. 4 figs 4–7; Redier, 1971: 70; Stepanjants, 1979: 109, pl. 16 fig. 8; Blanco, 1994 a: 156; 1994 b: 187; Vervoort & Watson, 2003: 86; Peña Cantero, 2004: 769; Peña Cantero et al ., 2013: 747 fig. 6 c. Material examined. Syntype, SMNH Type- 7948, Schwedischen Antarctic-Expedition 1901–1903 , Stn 5 , 64° 20 ’S 56 ° 38 ’W (SE of Seymour Island, Graham Region), four fragments up to 7 mm long. Diagnosis. Polysiphonic, irregularly branched stems, up to 25 mm high. Branches originating either from abcauline side of hydrophore of primary hydrotheca or from inside hydrotheca. Usually, with ahydrothecate intermediate internode after apophysis. Hydrothecae alternately arranged in either one or two planes. Hydrotheca at the end of short, adnate hydrophore. Hydrotheca very slightly widening distally; rim not everted. Adcauline hydrothecal wall free or adnate to internode. Hydrothecal aperture slightly directed downwards. No secondary hydrothecae present. Male gonotheca elongated, cylindrical, distally with a wide, shallow furrow, and proximally with a sharp keel. Female gonotheca unknown. Cnidome consisting of microbasic mastigophores? and microbasic euryteles? Description. Material studied consisting of four fragments up to 7 mm long; stems up to 25 mm according to Jäderholm (1904, 1905). Apparently, branching alternate. Longest fragment provided with four side-branches: first one originating from a primary hydrotheca through an apophysis and an intermediate, short, ahydrothecate internode before the first hydrothecate internode; the other three branches arising from the lateral of hydrophores. Seemingly, side-branches resting on large apophyses, frequently followed by an intermediate, short, ahydrothecate internode. Stem and branches divided by alternately arranged nodes into relatively short and wide internodes (Fig. 4 D–F). Hydrothecae alternately arranged, from more or less in one plane to about 90 °. Hydrothecae resting on adnate hydrophores (Fig. 4 D–F); ratio between adcauline length of hydrophore and diameter at diaphragm c. 0.5. Hydrotheca low, very slightly widening distally (Fig. 4 F). Adcauline hydrothecal wall usually adnate, sometimes free (Fig. 4 F). Hydrothecal aperture perpendicular to long axis of internode or slightly directed downwards (Fig. 4 D–F). Hydrotheca not surpassing distal node of internode. Coenosarc white. Measurements (in µm). Hydrothecae : diameter at aperture 210–220, diameter at diaphragm 190–215, height 30–45. Internodes : length 525–600, diameter at distal part 180–230. Cnidome : microbasic euryteles? with rounded ends [range 11–12 x 6–6.5, mean 11.7 ± 0.3 x 6.3 ± 0.2 (n= 10); ratio, range 1.7 –2.0, mean 1.9 ± 0.1 (n= 10)] and microbasic mastigophores? with sharp ends (6.5–7.5 x 2–3). Remarks. According to Jäderholm, the stem, c. 25 mm high, and the branches are stiff and polysiphonic (monosiphonic distally) and the branching is irregular in different planes. The female gonothecae are unknown, but there were male gonothecae, c. 1600 µm high and 320–360 µm wide, resting on very short pedicels. The gonotheca is elongated, cylindrical, weakly bent at distal part and provided with a wide, shallow furrow. It has a thin and high, very sharp keel in the proximal part. Halecium brevithecum is similar to H. secundum in the low hydrothecae, the cnidome and the branching. The branches originate either just below the hydrotheca or from inside it in both species. Moreover, there is usually an ahydrothecate internode following the apophysis. Concerning the cnidome, the larger nematocysts are apparently of the same range. Finally, both species also have low hydrothecae, although they are slightly higher in H. secundum . In addition, the adcauline wall is distinctly more developed and completely adnate to the internode in H. brevithecum (Fig. 4 A–C), whereas it is only slightly more developed and usually free in H. secundum (Fig. 4 D–F). Furthermore, as shown above, H. brevithecum is also characterized by the reddish stems, the distinctly longer first hydrothecate internode of the branches, and the more or less perpendicular arrangement of the lower-order branches in relation to the previous ones. Ecology and distribution. Halecium secundum has been found at depth between 40 (Peña Cantero et al . 2013) and 150 m (Jäderholm 1904), on sponges and bryozoans (Jäderholm 1904). Halecium secundum seems to have a circum-Antarctic distribution, recorded from off Seymour Island, Graham region (Jäderholm 1904), in West Antarctica, and from Tethys Bay, Ross Sea (Peña Cantero et al . 2013), in East Antarctica. However, it has also been reported in the Kerguélen area (Redier 1971). If this record was confirmed, H. secundum would have an Antarctic-Kerguélen distribution. : Published as part of Peña Cantero, Álvaro L., 2014, Revision of the Antarctic species of Halecium Oken, 1815 (Cnidaria, Hydrozoa, Haleciidae), pp. 243-280 in Zootaxa 3790 (2) on pages 273-274, DOI: 10.11646/zootaxa.3790.2.2, http://zenodo.org/record/226890 : {"references": ["Jaderholm, E. (1904) Mitteilungen ueber einige von der Schwedischen Antarctic-Expedition 1901 - 1903 eingesammelte Hydroiden. Archives de Zoologie Experimentale et Generale, (4) 3 (Notes et revue 1), 1 - 14.", "Redier, L. (1971) Contribution a l'etude des hydraires et des bryozoaires de Kerguelen. In: Invertebres de l'infralittoral rocheux dans l'Archipel de Kerguelen. Comite national Francais des Recherches Antarctiques, 30, 67 - 88.", "Stepanjants, S. D. (1979) Hydroids of the antarctic and subantarctic waters. In: Biological results of the Soviet Antarctic Expedition, 6. Issledovaniya Fauny Morei, 20 (30), 1 - 200, pls 1 - 25. [in Russian]", "Blanco, O. M. (1994 a) Enumeracion sistematica y distribucion geografica preliminar de los Hydroida de la Republica Argentina suborden Athecata (Gymnoblastea, Anthomedusae), Thecata (Calyptoblastea, Leptomedusae) y Limnomedusae. Revista del Museo de La Plata (Zoologia), 14 (161), 181 - 216.", "Vervoort, W. & Watson, J. E. (2003) The Marine Fauna of New Zealand: Leptothecata (Cnidaria: Hydrozoa) (Thecate Hydroids). NIWA Biodiversity Memoir, 119, 1 - 538, figs. 1 - 108.", "Pena Cantero, A. L. (2004) How rich is the deep-sea Antarctic benthic hydroid fauna? Polar Biology, 27, 767 - 774. http: // dx. doi. org / 10.1007 / s 00300 - 004 - 0654 - 9", "Jaderholm, E. (1905) Hydroiden aus antarktischen und subantarktischen Meeren, gesammelt von der schwedischen Sudpolarexpedition. Wissenschaftliche Ergebnisse der Schwedischen Sudpolar-Expedition 1901 - 1903, 5 (8), 1 - 41, pls 1 - 14."]} Text Antarc* Antarctic Antarctica Antarctique* Antarktis* East Antarctica Ross Sea Seymour Island West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic East Antarctica Ross Sea Kerguelen West Antarctica New Zealand Argentina Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Blanco ENVELOPE(-55.233,-55.233,-61.250,-61.250) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Pena ENVELOPE(40.562,40.562,63.490,63.490) Tethys Bay ENVELOPE(164.067,164.067,-74.683,-74.683) |