Corydendrium dispar Kramp 1935
Corydendrium dispar Kramp, 1935 Figs. 7 a, b, 8 Corydendrium dispar Kramp, 1935: 3, figs. 1a, b, 2a–d, 3, unnumbered plate, figs. 1a, b, 2–8. Type locality. Sweden: Kattegat, Kungsbackafjord, 26 m (Kramp 1935). Material examined. NS: Petit Passage, south of East Ferry, datum + 5 cm, 14.x.1970, on a...
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Online Access: | https://dx.doi.org/10.5281/zenodo.6015978 https://zenodo.org/record/6015978 |
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ftdatacite:10.5281/zenodo.6015978 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Oceaniidae Corydendrium Corydendrium dispar |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Oceaniidae Corydendrium Corydendrium dispar Calder, Dale R. Corydendrium dispar Kramp 1935 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Oceaniidae Corydendrium Corydendrium dispar |
description |
Corydendrium dispar Kramp, 1935 Figs. 7 a, b, 8 Corydendrium dispar Kramp, 1935: 3, figs. 1a, b, 2a–d, 3, unnumbered plate, figs. 1a, b, 2–8. Type locality. Sweden: Kattegat, Kungsbackafjord, 26 m (Kramp 1935). Material examined. NS: Petit Passage, south of East Ferry, datum + 5 cm, 14.x.1970, on a mussel shell ( Mytilus edulis ) with other hydroids, one colony, without gonophores, coll. K.W. Petersen, SNM HYD- 000871. Description. Hydroid colony minute, up to 4 mm high, with both stolonal and erect parts, arising from a creeping hydrorhiza; growth monopodial with terminal hydranths. Hydrocaulus when present monosiphonic, curved and twisted, slender basally, very gradually expanding distally, giving off a few irregular branchlets or a branch. Branches and branchlets adnate to axis for a short distance at proximal end before diverging, with branches similar in form to main axis; ultimate branchlets mostly short, slender basally, expanding distally, about 0.15–0.20 mm in diameter terminally. Perisarc thin, double-layered, this especially noticeable towards base of hydrocaulus or pedicel, with inner layer thicker, outer layer filmy, more or less wrinkled throughout. Hydranths terminal, clavate, up to 0.5 mm long, 0.15 mm wide, partially surrounded basally by perisarc; hypostome dome-shaped. Tentacles filiform, scattered, about 10-14 in number. Gonophores not seen. Cnidome (Fig. 8) Hydranths— desmonemes (n = 10): 4.5–5.2 µm long × 2.7–3.1 µm wide (undischarged) microbasic euryteles (n = 10): 8.0–9.9 µm long × 4.0–4.9 µm wide (undischarged) Remarks. Kramp (1935) discovered this boreal species during an examination of hydroids collected in the Skagerrak and Kattegat by L.A. Jägerskiöld of the Göteborgs Naturhistoriska Museum, Sweden. He recognized that it was similar to but specifically distinct from Corydendrium parasiticum (Linnaeus, 1767), a warm water species, and established the binomen C. dispar for it. Specimens from Norway, identified earlier by Bonnevie (1899b) as C. parasiticum , were examined by Kramp and found to be C. dispar . Gonophores arise as oval to nearly spherical external outgrowths of the stem, branches, and branchlets, and are not contained within perisarcal tubes of stem and branches during development as in C. parasiticum (Kramp 1935). Males of the species are much more highly reduced in structure than females. An infrequently encountered hydroid, Corydendrium dispar has been reported most often from the Kattegat, in both Swedish (Kramp 1935; Jägerskiöld 1971; Schuchert 2004) and Danish (Dahl et al . 2009) waters. Elsewhere, it has been found along the west coast of Norway as far north as the Trondheimfjord (Kramp 1935), and from the Faroes (Jensen & Frederiksen 1992; Schuchert 2004). This is the first record of the species from the Atlantic coast of North America. Specimens of Corydendrium dispar examined here were collected by K.W. Petersen (SNM HYD- 000871) on a mussel shell in Petit Passage, Nova Scotia. The location is characterized by powerful tidal currents that flow through a narrow channel connecting St. Mary’s Bay and the Bay of Fundy. With a vertical tidal range in the region of about 7 m, maximum surface currents exceed 3 m /second during an average spring tide (Durand et al . 2008). The colony, or colonies, were small, inconspicuous, and partially obscured by the growth of other hydroid species. Discovery of the species near low water at this unusual site is noteworthy in that previous records of C. dispar (Kramp 1935; Jägerskiöld 1971; Jensen & Frederiksen 1992; Schuchert 2004) are from greater depths (26–260 m). Recorded distribution. Bay of Fundy: recorded for the first time. Eastern North America: recorded for the first time. Worldwide: Scandinavia, from the Trondheimfjord to the Kattegat (Kramp 1935); Faroe Islands (Jensen & Frederiksen 1992; Schuchert 2004); Atlantic Canada (this study). : Published as part of Calder, Dale R., 2017, Additions to the hydroids (Cnidaria, Hydrozoa) of the Bay of Fundy, northeastern North America, with a checklist of species reported from the region, pp. 1-86 in Zootaxa 4256 (1) on pages 18-19, DOI: 10.5281/zenodo.556851 : {"references": ["Kramp, P. L. (1935) Corydendrium dispar, a new athecate hydroid from Scandinavian seas, with remarks on classification. Goteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar, femte foljden, Series B, 4 (11), 1 - 15.", "Linnaeus, C. (1767) Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Pars II. Editio duodecima, reformata. Laurentii Salvii, Holmiae, pp. 533 - 1317.", "Bonnevie, K. (1899 b) Hydroida. Den Norske Nordhavs-Expedition 1876 - 1878. Zoologi, 7 (26), 1 - 103.", "Jagerskiold, L. A. (1971) A survey of the marine benthonic macro-fauna along the Swedish west coast 1921 - 1938. Acta Regiae Societatis Scientiarum et Litterarum Gothobergensis, Zoologica, 6, 1 - 146.", "Schuchert, P. (2004) Revision of the European athecate hydroids and their medusae (Hydrozoa, Cnidaria): families Oceanidae and Pachycordylidae. Revue Suisse de Zoologie, 111, 315 - 369.", "Dahl, K., Stenberg, C., Lundsteen, S., Stottrup, J., Dolmer, P. & Tendal, O. S. (2009) Ecology of LaesO Trindel - a reef impacted by extraction of boulders. National Environmental Research Institute Technical Report No. 757. Aarus University, Aarhus 48 pp.", "Jensen, A. & Frederiksen, R. (1992) The fauna associated with the bank-forming deepwater coral Lophelia pertusa (Scleractinaria) on the Faroe Shelf. Sarsia, 77, 53 - 69.", "Durand, N., Cornett, A. & Bourban, S. (2008) 3 D modelling and assessment of tidal current energy resources in the Bay of Fundy. National Research Council of Canada, Canadian Hydraulics Centre Technical Report, CHC-TR- 052, 1 - 110."]} |
format |
Text |
author |
Calder, Dale R. |
author_facet |
Calder, Dale R. |
author_sort |
Calder, Dale R. |
title |
Corydendrium dispar Kramp 1935 |
title_short |
Corydendrium dispar Kramp 1935 |
title_full |
Corydendrium dispar Kramp 1935 |
title_fullStr |
Corydendrium dispar Kramp 1935 |
title_full_unstemmed |
Corydendrium dispar Kramp 1935 |
title_sort |
corydendrium dispar kramp 1935 |
publisher |
Zenodo |
publishDate |
2017 |
url |
https://dx.doi.org/10.5281/zenodo.6015978 https://zenodo.org/record/6015978 |
long_lat |
ENVELOPE(9.692,9.692,63.563,63.563) ENVELOPE(-101.250,-101.250,-71.917,-71.917) ENVELOPE(-6.000,-6.000,62.000,62.000) |
geographic |
Faroe Islands Canada Norway Kattegat Petersen Faroe Shelf |
geographic_facet |
Faroe Islands Canada Norway Kattegat Petersen Faroe Shelf |
genre |
Faroe Islands Faroes Lophelia pertusa National Environmental Research Institute |
genre_facet |
Faroe Islands Faroes Lophelia pertusa National Environmental Research Institute |
op_relation |
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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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CC0 |
op_doi |
https://doi.org/10.5281/zenodo.6015978 https://doi.org/10.5281/zenodo.556851 https://doi.org/10.5281/zenodo.556858 https://doi.org/10.5281/zenodo.556859 https://doi.org/10.5281/zenodo.6015979 |
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ftdatacite:10.5281/zenodo.6015978 2023-05-15T16:11:08+02:00 Corydendrium dispar Kramp 1935 Calder, Dale R. 2017 https://dx.doi.org/10.5281/zenodo.6015978 https://zenodo.org/record/6015978 unknown Zenodo http://publication.plazi.org/id/FF9EFFBF492CFF81FFCFFFE9FFF0FFF1 http://zoobank.org/985C0239-D00C-457D-B593-76A3081BCEEA https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.556851 http://publication.plazi.org/id/FF9EFFBF492CFF81FFCFFFE9FFF0FFF1 https://dx.doi.org/10.5281/zenodo.556858 https://dx.doi.org/10.5281/zenodo.556859 http://zoobank.org/985C0239-D00C-457D-B593-76A3081BCEEA https://dx.doi.org/10.5281/zenodo.6015979 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 Anthoathecata Oceaniidae Corydendrium Corydendrium dispar article-journal ScholarlyArticle Taxonomic treatment Text 2017 ftdatacite https://doi.org/10.5281/zenodo.6015978 https://doi.org/10.5281/zenodo.556851 https://doi.org/10.5281/zenodo.556858 https://doi.org/10.5281/zenodo.556859 https://doi.org/10.5281/zenodo.6015979 2022-04-01T09:19:22Z Corydendrium dispar Kramp, 1935 Figs. 7 a, b, 8 Corydendrium dispar Kramp, 1935: 3, figs. 1a, b, 2a–d, 3, unnumbered plate, figs. 1a, b, 2–8. Type locality. Sweden: Kattegat, Kungsbackafjord, 26 m (Kramp 1935). Material examined. NS: Petit Passage, south of East Ferry, datum + 5 cm, 14.x.1970, on a mussel shell ( Mytilus edulis ) with other hydroids, one colony, without gonophores, coll. K.W. Petersen, SNM HYD- 000871. Description. Hydroid colony minute, up to 4 mm high, with both stolonal and erect parts, arising from a creeping hydrorhiza; growth monopodial with terminal hydranths. Hydrocaulus when present monosiphonic, curved and twisted, slender basally, very gradually expanding distally, giving off a few irregular branchlets or a branch. Branches and branchlets adnate to axis for a short distance at proximal end before diverging, with branches similar in form to main axis; ultimate branchlets mostly short, slender basally, expanding distally, about 0.15–0.20 mm in diameter terminally. Perisarc thin, double-layered, this especially noticeable towards base of hydrocaulus or pedicel, with inner layer thicker, outer layer filmy, more or less wrinkled throughout. Hydranths terminal, clavate, up to 0.5 mm long, 0.15 mm wide, partially surrounded basally by perisarc; hypostome dome-shaped. Tentacles filiform, scattered, about 10-14 in number. Gonophores not seen. Cnidome (Fig. 8) Hydranths— desmonemes (n = 10): 4.5–5.2 µm long × 2.7–3.1 µm wide (undischarged) microbasic euryteles (n = 10): 8.0–9.9 µm long × 4.0–4.9 µm wide (undischarged) Remarks. Kramp (1935) discovered this boreal species during an examination of hydroids collected in the Skagerrak and Kattegat by L.A. Jägerskiöld of the Göteborgs Naturhistoriska Museum, Sweden. He recognized that it was similar to but specifically distinct from Corydendrium parasiticum (Linnaeus, 1767), a warm water species, and established the binomen C. dispar for it. Specimens from Norway, identified earlier by Bonnevie (1899b) as C. parasiticum , were examined by Kramp and found to be C. dispar . Gonophores arise as oval to nearly spherical external outgrowths of the stem, branches, and branchlets, and are not contained within perisarcal tubes of stem and branches during development as in C. parasiticum (Kramp 1935). Males of the species are much more highly reduced in structure than females. An infrequently encountered hydroid, Corydendrium dispar has been reported most often from the Kattegat, in both Swedish (Kramp 1935; Jägerskiöld 1971; Schuchert 2004) and Danish (Dahl et al . 2009) waters. Elsewhere, it has been found along the west coast of Norway as far north as the Trondheimfjord (Kramp 1935), and from the Faroes (Jensen & Frederiksen 1992; Schuchert 2004). This is the first record of the species from the Atlantic coast of North America. Specimens of Corydendrium dispar examined here were collected by K.W. Petersen (SNM HYD- 000871) on a mussel shell in Petit Passage, Nova Scotia. The location is characterized by powerful tidal currents that flow through a narrow channel connecting St. Mary’s Bay and the Bay of Fundy. With a vertical tidal range in the region of about 7 m, maximum surface currents exceed 3 m /second during an average spring tide (Durand et al . 2008). The colony, or colonies, were small, inconspicuous, and partially obscured by the growth of other hydroid species. Discovery of the species near low water at this unusual site is noteworthy in that previous records of C. dispar (Kramp 1935; Jägerskiöld 1971; Jensen & Frederiksen 1992; Schuchert 2004) are from greater depths (26–260 m). Recorded distribution. Bay of Fundy: recorded for the first time. Eastern North America: recorded for the first time. Worldwide: Scandinavia, from the Trondheimfjord to the Kattegat (Kramp 1935); Faroe Islands (Jensen & Frederiksen 1992; Schuchert 2004); Atlantic Canada (this study). : Published as part of Calder, Dale R., 2017, Additions to the hydroids (Cnidaria, Hydrozoa) of the Bay of Fundy, northeastern North America, with a checklist of species reported from the region, pp. 1-86 in Zootaxa 4256 (1) on pages 18-19, DOI: 10.5281/zenodo.556851 : {"references": ["Kramp, P. L. (1935) Corydendrium dispar, a new athecate hydroid from Scandinavian seas, with remarks on classification. Goteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar, femte foljden, Series B, 4 (11), 1 - 15.", "Linnaeus, C. (1767) Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Pars II. Editio duodecima, reformata. Laurentii Salvii, Holmiae, pp. 533 - 1317.", "Bonnevie, K. (1899 b) Hydroida. Den Norske Nordhavs-Expedition 1876 - 1878. Zoologi, 7 (26), 1 - 103.", "Jagerskiold, L. A. (1971) A survey of the marine benthonic macro-fauna along the Swedish west coast 1921 - 1938. Acta Regiae Societatis Scientiarum et Litterarum Gothobergensis, Zoologica, 6, 1 - 146.", "Schuchert, P. (2004) Revision of the European athecate hydroids and their medusae (Hydrozoa, Cnidaria): families Oceanidae and Pachycordylidae. Revue Suisse de Zoologie, 111, 315 - 369.", "Dahl, K., Stenberg, C., Lundsteen, S., Stottrup, J., Dolmer, P. & Tendal, O. S. (2009) Ecology of LaesO Trindel - a reef impacted by extraction of boulders. National Environmental Research Institute Technical Report No. 757. Aarus University, Aarhus 48 pp.", "Jensen, A. & Frederiksen, R. (1992) The fauna associated with the bank-forming deepwater coral Lophelia pertusa (Scleractinaria) on the Faroe Shelf. Sarsia, 77, 53 - 69.", "Durand, N., Cornett, A. & Bourban, S. (2008) 3 D modelling and assessment of tidal current energy resources in the Bay of Fundy. National Research Council of Canada, Canadian Hydraulics Centre Technical Report, CHC-TR- 052, 1 - 110."]} Text Faroe Islands Faroes Lophelia pertusa National Environmental Research Institute DataCite Metadata Store (German National Library of Science and Technology) Faroe Islands Canada Norway Kattegat ENVELOPE(9.692,9.692,63.563,63.563) Petersen ENVELOPE(-101.250,-101.250,-71.917,-71.917) Faroe Shelf ENVELOPE(-6.000,-6.000,62.000,62.000) |