Halecium beanii Johnston 1838
Halecium cf. beanii (Johnston, 1838) (fig. 3 D) Thoa beanii Johnston, 1838: 120, pl. 7 figs 1–2. Halecium beanii – Schuchert, 2005: 615, figs 5 –6. Material examined. Stn. T10, 15.ii.2005: one sterile colony, 5.5 cm high, with polysiphonic stem (NHM 2009.17). Remarks. The examined specimen is provis...
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ftzenodo:oai:zenodo.org:6209985 2023-05-15T13:51:48+02:00 Halecium beanii Johnston 1838 Galea, Horia R. 2010-12-31 https://zenodo.org/record/6209985 https://doi.org/10.5281/zenodo.6209985 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03E7237EFFF04D55FF771A80F61EFF44 doi:10.5281/zenodo.205235 http://publication.plazi.org/id/FFDE5B06FFF34D51FFE01E40F349FFB8 doi:10.5281/zenodo.205238 doi:10.5281/zenodo.205236 doi:10.5281/zenodo.208193 doi:10.5281/zenodo.205240 doi:10.5281/zenodo.6209984 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6209985 https://doi.org/10.5281/zenodo.6209985 oai:zenodo.org:6209985 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Notes on a small collection of thecate hydroids (Cnidaria: Hydrozoa) from Tristan da Cunha, south Atlantic, pp. 1-18 in Zootaxa 2336 4-5 Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium beanii info:eu-repo/semantics/other publication-taxonomictreatment 2010 ftzenodo https://doi.org/10.5281/zenodo.620998510.5281/zenodo.20523510.5281/zenodo.20523810.5281/zenodo.20523610.5281/zenodo.20819310.5281/zenodo.20524010.5281/zenodo.6209984 2023-03-10T14:08:52Z Halecium cf. beanii (Johnston, 1838) (fig. 3 D) Thoa beanii Johnston, 1838: 120, pl. 7 figs 1–2. Halecium beanii – Schuchert, 2005: 615, figs 5 –6. Material examined. Stn. T10, 15.ii.2005: one sterile colony, 5.5 cm high, with polysiphonic stem (NHM 2009.17). Remarks. The examined specimen is provisionally assigned to Johnston’s (1838) species on the account of its polysiphonic, irregularly branched stem. However, additional fertile female specimens are necessary to validate the present identification. Millard (1975) observed both H. beanii and H. halecinum (Linnaeus, 1758) in South Africa, the closest location to Tristan da Cunha. She also warned about the impossibility of proper identification of these species in the absence of female gonothecae. On the other hand, Cornelius (1995a) showed that Linnaeus’ (1758) species always forms regularly pinnate colonies, while the stems of H. beanii are “imperfectly pinnate, shrubby, varied in appearance”, a conclusion partly shared by Schuchert (2005), who showed several exceptions. Although Millard (1975) did not discuss any morphological peculiarities in the female gonothecae of H. beanii from South Africa, Schuchert (2005) showed several important differences (polygonal cross-section, 1. Torrey’s (1902) species has sessile primary hydrothecae, not terminal on branches, as illustrated by Jäderholm (1920). increased number of eggs), rendering it distinct from the European population. Distribution. Cosmopolitan, penetrating well into the Arctic Ocean and the coasts of Patagonia, but not into the Antarctic (Medel & Vervoort 2000). This is the first record of this species for Tristan da Cunha. Published as part of Galea, Horia R., 2010, Notes on a small collection of thecate hydroids (Cnidaria: Hydrozoa) from Tristan da Cunha, south Atlantic, pp. 1-18 in Zootaxa 2336 on pages 4-5, DOI:10.5281/zenodo.205235 Other/Unknown Material Antarc* Antarctic Arctic Arctic Ocean Zenodo Arctic Antarctic The Antarctic Arctic Ocean Patagonia Tristan ENVELOPE(140.900,140.900,-66.735,-66.735) |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium beanii |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium beanii Galea, Horia R. Halecium beanii Johnston 1838 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Haleciidae Halecium Halecium beanii |
description |
Halecium cf. beanii (Johnston, 1838) (fig. 3 D) Thoa beanii Johnston, 1838: 120, pl. 7 figs 1–2. Halecium beanii – Schuchert, 2005: 615, figs 5 –6. Material examined. Stn. T10, 15.ii.2005: one sterile colony, 5.5 cm high, with polysiphonic stem (NHM 2009.17). Remarks. The examined specimen is provisionally assigned to Johnston’s (1838) species on the account of its polysiphonic, irregularly branched stem. However, additional fertile female specimens are necessary to validate the present identification. Millard (1975) observed both H. beanii and H. halecinum (Linnaeus, 1758) in South Africa, the closest location to Tristan da Cunha. She also warned about the impossibility of proper identification of these species in the absence of female gonothecae. On the other hand, Cornelius (1995a) showed that Linnaeus’ (1758) species always forms regularly pinnate colonies, while the stems of H. beanii are “imperfectly pinnate, shrubby, varied in appearance”, a conclusion partly shared by Schuchert (2005), who showed several exceptions. Although Millard (1975) did not discuss any morphological peculiarities in the female gonothecae of H. beanii from South Africa, Schuchert (2005) showed several important differences (polygonal cross-section, 1. Torrey’s (1902) species has sessile primary hydrothecae, not terminal on branches, as illustrated by Jäderholm (1920). increased number of eggs), rendering it distinct from the European population. Distribution. Cosmopolitan, penetrating well into the Arctic Ocean and the coasts of Patagonia, but not into the Antarctic (Medel & Vervoort 2000). This is the first record of this species for Tristan da Cunha. Published as part of Galea, Horia R., 2010, Notes on a small collection of thecate hydroids (Cnidaria: Hydrozoa) from Tristan da Cunha, south Atlantic, pp. 1-18 in Zootaxa 2336 on pages 4-5, DOI:10.5281/zenodo.205235 |
format |
Other/Unknown Material |
author |
Galea, Horia R. |
author_facet |
Galea, Horia R. |
author_sort |
Galea, Horia R. |
title |
Halecium beanii Johnston 1838 |
title_short |
Halecium beanii Johnston 1838 |
title_full |
Halecium beanii Johnston 1838 |
title_fullStr |
Halecium beanii Johnston 1838 |
title_full_unstemmed |
Halecium beanii Johnston 1838 |
title_sort |
halecium beanii johnston 1838 |
publishDate |
2010 |
url |
https://zenodo.org/record/6209985 https://doi.org/10.5281/zenodo.6209985 |
long_lat |
ENVELOPE(140.900,140.900,-66.735,-66.735) |
geographic |
Arctic Antarctic The Antarctic Arctic Ocean Patagonia Tristan |
geographic_facet |
Arctic Antarctic The Antarctic Arctic Ocean Patagonia Tristan |
genre |
Antarc* Antarctic Arctic Arctic Ocean |
genre_facet |
Antarc* Antarctic Arctic Arctic Ocean |
op_source |
Notes on a small collection of thecate hydroids (Cnidaria: Hydrozoa) from Tristan da Cunha, south Atlantic, pp. 1-18 in Zootaxa 2336 4-5 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03E7237EFFF04D55FF771A80F61EFF44 doi:10.5281/zenodo.205235 http://publication.plazi.org/id/FFDE5B06FFF34D51FFE01E40F349FFB8 doi:10.5281/zenodo.205238 doi:10.5281/zenodo.205236 doi:10.5281/zenodo.208193 doi:10.5281/zenodo.205240 doi:10.5281/zenodo.6209984 https://zenodo.org/communities/biosyslit https://zenodo.org/record/6209985 https://doi.org/10.5281/zenodo.6209985 oai:zenodo.org:6209985 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.620998510.5281/zenodo.20523510.5281/zenodo.20523810.5281/zenodo.20523610.5281/zenodo.20819310.5281/zenodo.20524010.5281/zenodo.6209984 |
_version_ |
1766255836478308352 |