Halecium elegantulum Watson 2008
Halecium elegantulum Watson, 2008 (Fig. 5 A–F) Halecium elegantulum Watson, 2008: 170 –171, fig. 6 A–C. Material examined. Holotype, BANZARE , Stn 103 , 67°03'S – 74 ° 29 'E (Mawson Coast), 437 m, 10.2. 31, two microslides (Hydr. 709 / 13, F 147463.1 & F 147463.2), several stems on Sym...
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ftdatacite:10.5281/zenodo.4630876 2023-05-15T14:01:46+02:00 Halecium elegantulum Watson 2008 Peña Cantero, Álvaro L. 2014 https://dx.doi.org/10.5281/zenodo.4630876 https://zenodo.org/record/4630876 unknown Zenodo http://zenodo.org/record/226890 http://publication.plazi.org/id/C25BFF98294DFF8F2C3E185B3F31FFAC http://treatment.plazi.org/id/039D5126FFA3FFBA1B25F9CB1FCA9461 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.226895 https://dx.doi.org/10.5281/zenodo.4630627 http://treatment.plazi.org/id/039D5126FFA3FFBA1B25F9CB1FCA9461 http://zoobank.org/BE6B199C-6E81-478A-8AC9-EB674B85FA35 https://dx.doi.org/10.5281/zenodo.4630877 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium elegantulum Taxonomic treatment article-journal Text ScholarlyArticle 2014 ftdatacite https://doi.org/10.5281/zenodo.4630876 https://doi.org/10.11646/zootaxa.3790.2.2 https://doi.org/10.5281/zenodo.226895 https://doi.org/10.5281/zenodo.4630627 https://doi.org/10.5281/zenodo.4630877 2022-02-08T13:29:49Z Halecium elegantulum Watson, 2008 (Fig. 5 A–F) Halecium elegantulum Watson, 2008: 170 –171, fig. 6 A–C. Material examined. Holotype, BANZARE , Stn 103 , 67°03'S – 74 ° 29 'E (Mawson Coast), 437 m, 10.2. 31, two microslides (Hydr. 709 / 13, F 147463.1 & F 147463.2), several stems on Symplectoscyphus cf. glacialis , together with Filellum sp. and Opercularella sp. Diagnosis. Tiny, monosiphonic, unbranched stems, formed by a series of hydrothecae, each emerging from previous one far below its rim. Hydrotheca strongly widening distally; rim slightly everted. Neither diaphragm nor desmocytes present. Cnidome and gonothecae unknown. Description. Stolonal hydrorhiza. Pedicels extremely long, up to several millimetres high (Fig. 5 A, B). Stems unbranched (Fig. 5 A–C), but formed by a series of hydrothecae, each emerging from the previous hydrotheca (Fig. 5 C). Sometimes, pedicels provided with a single distal hydrotheca (Fig. 5 B). Hydrothecae strongly widening distally (Fig. 5 A–F), rim slightly everted (Fig. 5 D, F). Apparently, neither diaphragm nor desmocytes present (Fig. 5 D–F). Lower-order hydrothecae arising far below rim of previous hydrotheca, not from diaphragm as usually happens to species of Halecium . Gonothecae absent. No nematocysts could be observed. Measurements (in µm). Hydrothecae : diameter at aperture 110–130, diameter at origin of lower-order pedicel 60–70, height from origin of lower-order pedicel to hydrothecal rim 25–50. Internodes : length several millimetres, diameter 50–55. Remarks. This species is peculiar and easily recognizable by the colony structure with unbranched, delicate stems, consisting of a succession of lower-order hydrothecae, as well as by the absence of hydrothecal diaphragm. Ecology and distribution. Halecium elegantulum is only known from off Mawson Coast, where it was found at a depth of 437 m (Watson 2008). : 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 253-255, DOI: 10.11646/zootaxa.3790.2.2, http://zenodo.org/record/226890 : {"references": ["Watson, J. E. (2008) Hydroids of the BANZARE expeditions, 1929 - 1931: the family Haleciidae (Hydrozoa, Leptothecata) from the Australian Antarctic Territory. Memoirs of the Museum of Victoria, 65, 165 - 178."]} Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic Australian Antarctic Territory Mawson Coast ENVELOPE(63.000,63.000,-68.000,-68.000) |
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 elegantulum |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium elegantulum Peña Cantero, Álvaro L. Halecium elegantulum Watson 2008 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium elegantulum |
description |
Halecium elegantulum Watson, 2008 (Fig. 5 A–F) Halecium elegantulum Watson, 2008: 170 –171, fig. 6 A–C. Material examined. Holotype, BANZARE , Stn 103 , 67°03'S – 74 ° 29 'E (Mawson Coast), 437 m, 10.2. 31, two microslides (Hydr. 709 / 13, F 147463.1 & F 147463.2), several stems on Symplectoscyphus cf. glacialis , together with Filellum sp. and Opercularella sp. Diagnosis. Tiny, monosiphonic, unbranched stems, formed by a series of hydrothecae, each emerging from previous one far below its rim. Hydrotheca strongly widening distally; rim slightly everted. Neither diaphragm nor desmocytes present. Cnidome and gonothecae unknown. Description. Stolonal hydrorhiza. Pedicels extremely long, up to several millimetres high (Fig. 5 A, B). Stems unbranched (Fig. 5 A–C), but formed by a series of hydrothecae, each emerging from the previous hydrotheca (Fig. 5 C). Sometimes, pedicels provided with a single distal hydrotheca (Fig. 5 B). Hydrothecae strongly widening distally (Fig. 5 A–F), rim slightly everted (Fig. 5 D, F). Apparently, neither diaphragm nor desmocytes present (Fig. 5 D–F). Lower-order hydrothecae arising far below rim of previous hydrotheca, not from diaphragm as usually happens to species of Halecium . Gonothecae absent. No nematocysts could be observed. Measurements (in µm). Hydrothecae : diameter at aperture 110–130, diameter at origin of lower-order pedicel 60–70, height from origin of lower-order pedicel to hydrothecal rim 25–50. Internodes : length several millimetres, diameter 50–55. Remarks. This species is peculiar and easily recognizable by the colony structure with unbranched, delicate stems, consisting of a succession of lower-order hydrothecae, as well as by the absence of hydrothecal diaphragm. Ecology and distribution. Halecium elegantulum is only known from off Mawson Coast, where it was found at a depth of 437 m (Watson 2008). : 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 253-255, DOI: 10.11646/zootaxa.3790.2.2, http://zenodo.org/record/226890 : {"references": ["Watson, J. E. (2008) Hydroids of the BANZARE expeditions, 1929 - 1931: the family Haleciidae (Hydrozoa, Leptothecata) from the Australian Antarctic Territory. Memoirs of the Museum of Victoria, 65, 165 - 178."]} |
format |
Text |
author |
Peña Cantero, Álvaro L. |
author_facet |
Peña Cantero, Álvaro L. |
author_sort |
Peña Cantero, Álvaro L. |
title |
Halecium elegantulum Watson 2008 |
title_short |
Halecium elegantulum Watson 2008 |
title_full |
Halecium elegantulum Watson 2008 |
title_fullStr |
Halecium elegantulum Watson 2008 |
title_full_unstemmed |
Halecium elegantulum Watson 2008 |
title_sort |
halecium elegantulum watson 2008 |
publisher |
Zenodo |
publishDate |
2014 |
url |
https://dx.doi.org/10.5281/zenodo.4630876 https://zenodo.org/record/4630876 |
long_lat |
ENVELOPE(63.000,63.000,-68.000,-68.000) |
geographic |
Antarctic The Antarctic Australian Antarctic Territory Mawson Coast |
geographic_facet |
Antarctic The Antarctic Australian Antarctic Territory Mawson Coast |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://zenodo.org/record/226890 http://publication.plazi.org/id/C25BFF98294DFF8F2C3E185B3F31FFAC http://treatment.plazi.org/id/039D5126FFA3FFBA1B25F9CB1FCA9461 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.226895 https://dx.doi.org/10.5281/zenodo.4630627 http://treatment.plazi.org/id/039D5126FFA3FFBA1B25F9CB1FCA9461 http://zoobank.org/BE6B199C-6E81-478A-8AC9-EB674B85FA35 https://dx.doi.org/10.5281/zenodo.4630877 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.4630876 https://doi.org/10.11646/zootaxa.3790.2.2 https://doi.org/10.5281/zenodo.226895 https://doi.org/10.5281/zenodo.4630627 https://doi.org/10.5281/zenodo.4630877 |
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1766271806102044672 |