Sertularella sacciformis Choong, 2015, sp. nov.
Sertularella sacciformis sp. nov. (Figure 7) Material . Holotype: CANADA: British Columbia. Hecate Strait, Gwaii Haanas National Marine Park Reserve, 53 ˚ 32 ’ 48 ”N, 131 ˚ 19 ’ 30 ”W, 26. ix.1985, 26 meters, coll. R.O. Brinckhurst, hydrocaulus section, without gonothecae, ROMIZ B...
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Online Access: | https://dx.doi.org/10.5281/zenodo.6093742 https://zenodo.org/record/6093742 |
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ftdatacite:10.5281/zenodo.6093742 |
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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 Sertulariidae Sertularella Sertularella sacciformis |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Sertularella Sertularella sacciformis Choong, Henry H. C. Sertularella sacciformis Choong, 2015, sp. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Sertularella Sertularella sacciformis |
description |
Sertularella sacciformis sp. nov. (Figure 7) Material . Holotype: CANADA: British Columbia. Hecate Strait, Gwaii Haanas National Marine Park Reserve, 53 ˚ 32 ’ 48 ”N, 131 ˚ 19 ’ 30 ”W, 26. ix.1985, 26 meters, coll. R.O. Brinckhurst, hydrocaulus section, without gonothecae, ROMIZ B 2341. Paratype: CANADA: British Columbia. 54 ˚ 13 ’00”N, 132 ˚09’00”W, 29.iv. 1961, 98.8 meters, coll. D.B. Quayle, hydrocauli sections, without gonothecae, ROMIZ B 4070. Reported distribution . CANADA: British Columbia, Vancouver island, off Clayoquot Sound as Sertularella rugosa . Description . Hydrocaulus flexuous, stem geniculate; axis divided into internodes. Perisarc thin throughout. If present, ramifications arise from axis directly under axillary hydrotheca on same plane or angled perpendicularly. Ramification structure same as axis. Beginning of internode marked with two or three well-marked, oblique annular constrictions of perisarc. Internode segments narrowed basally, widening distally. Hydrothecae alternate, distant, one per internode on upper part, on same plane or slightly inclined, following ramification orientation; shape distinctly saccate basally, narrow distally. Saccate shape asymmetrical, adcauline side prominently protuberant. Adcauline wall approximately ¼ adnate, basal part of free portion fairly straight or moderately concavo-convex, distally inclined towards adcauline side. Distal portion of adcauline wall also slightly inclined outwards, forming slight concavity. Hydrothecae strongly annulated basally; apex of 3–4 annulations forming ribs or uneven, crested folds, widening towards adcauline side. Distal part of hydrothecae smooth, giving appearance of cylindrical neck, widening basally. Opercular opening rectangular, embayments shallow but flared, meeting to form four prominent cusps. Operculum of four triangular flaps, forming a low peak when closed. Intrathecal cusps not present. Gonothecae not found. Differential diagnosis . Due to the occasionally acute angle of the outward bend, the square-shaped hydrothecal aperture, and the general rugosity of the perisarc, the hydrothecae of Sertularella sacciformis can resemble those of S. rugosa (Linnaeus, 1758) or S. tenella . ROMIZ B 2341 was originally identified as S. rugosa , but S. rugosa lacks the smooth hydrothecal neck found in S. sacciformis . The absence or presence of a notch below the rim on the abcauline wall of the hydrotheca as seen from the side is considered to be a diagnostic feature separating S. rugosa from its congeners, although its systematic value has been questioned by some authors (Cornelius 1979, 1995; Schuchert 2001). Nevertheless, in S. sacciformis this notch is absent, although the appearance of a notch is occasionally approximated by the abcauline incline of the hydrothecal neck and the tumidity of the basal portion. This gives appearance of a notch, but the area below the hydrothecal rim is actually straight. In S. tenella , the hydrotheca resembles a broad-necked bottle, rather than the saccate, bent-neck shape of S. sacciformis . The nature of the rugosity is also different in all three species. In S. rugosa the encircling transverse ridges are sharp, forming deep furrows, which are especially marked on the abcauline side; in S. tenella , the sharp ridges which encircle the hydrotheca appear more evenly spaced, but in S. sacciformis , the annular segments form uneven, crested folds, widening towards the adcauline side. Moreover, in S. rugosa the colony tends to be poorly ramified on a single plane (Naumov 1969). In S. sacciformis , the stem is slender, and the hydrothecae are not as closely spaced as in S. rugosa . Etymology . The species name refers to the shape of the hydrothecae, from the Latin saccus (sack or pouchshaped). : Published as part of Choong, Henry H. C., 2015, Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species, pp. 387-408 in Zootaxa 3925 (3) on pages 402-404, DOI: 10.11646/zootaxa.3925.3.4, http://zenodo.org/record/236318 : {"references": ["Linnaeus, C. (1758) Systema naturae per regna tria naturae, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. Laurentii Salvii, Holmiae, 823 pp.", "Cornelius, P. F. S. (1979) A revision of the species of Sertulariidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bulletin of the British Museum (Natural History), Zoology, 34, 243 - 321.", "Cornelius, P. F. S. (1995) North-west European thecate hydroids and their medusae. Part 2. Sertulariidae to Campanulariidae. Synopses of the British Fauna, New Series, 50, 1 - 386.", "Schuchert, P. (2001) Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om Gronland, Bioscience, 53, 1 - 184."]} |
format |
Text |
author |
Choong, Henry H. C. |
author_facet |
Choong, Henry H. C. |
author_sort |
Choong, Henry H. C. |
title |
Sertularella sacciformis Choong, 2015, sp. nov. |
title_short |
Sertularella sacciformis Choong, 2015, sp. nov. |
title_full |
Sertularella sacciformis Choong, 2015, sp. nov. |
title_fullStr |
Sertularella sacciformis Choong, 2015, sp. nov. |
title_full_unstemmed |
Sertularella sacciformis Choong, 2015, sp. nov. |
title_sort |
sertularella sacciformis choong, 2015, sp. nov. |
publisher |
Zenodo |
publishDate |
2015 |
url |
https://dx.doi.org/10.5281/zenodo.6093742 https://zenodo.org/record/6093742 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-61.250,-61.250,-62.633,-62.633) ENVELOPE(70.203,70.203,-49.626,-49.626) ENVELOPE(-131.170,-131.170,53.500,53.500) |
geographic |
Canada Greenland Pacific British Columbia Rugosa Gronland Hecate Strait |
geographic_facet |
Canada Greenland Pacific British Columbia Rugosa Gronland Hecate Strait |
genre |
Greenland Iceland |
genre_facet |
Greenland Iceland |
op_relation |
http://zenodo.org/record/236318 http://publication.plazi.org/id/AF39F27C2F02AF69FFBEFF834232FFC2 http://zoobank.org/8CA0F940-B481-4D02-AC6E-B254AE4EF986 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3925.3.4 http://zenodo.org/record/236318 http://publication.plazi.org/id/AF39F27C2F02AF69FFBEFF834232FFC2 https://dx.doi.org/10.5281/zenodo.236324 http://zoobank.org/8CA0F940-B481-4D02-AC6E-B254AE4EF986 https://dx.doi.org/10.5281/zenodo.6093741 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC0 |
op_doi |
https://doi.org/10.5281/zenodo.6093742 https://doi.org/10.11646/zootaxa.3925.3.4 https://doi.org/10.5281/zenodo.236324 https://doi.org/10.5281/zenodo.6093741 |
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spelling |
ftdatacite:10.5281/zenodo.6093742 2023-05-15T16:30:48+02:00 Sertularella sacciformis Choong, 2015, sp. nov. Choong, Henry H. C. 2015 https://dx.doi.org/10.5281/zenodo.6093742 https://zenodo.org/record/6093742 unknown Zenodo http://zenodo.org/record/236318 http://publication.plazi.org/id/AF39F27C2F02AF69FFBEFF834232FFC2 http://zoobank.org/8CA0F940-B481-4D02-AC6E-B254AE4EF986 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3925.3.4 http://zenodo.org/record/236318 http://publication.plazi.org/id/AF39F27C2F02AF69FFBEFF834232FFC2 https://dx.doi.org/10.5281/zenodo.236324 http://zoobank.org/8CA0F940-B481-4D02-AC6E-B254AE4EF986 https://dx.doi.org/10.5281/zenodo.6093741 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 Sertulariidae Sertularella Sertularella sacciformis article-journal ScholarlyArticle Taxonomic treatment Text 2015 ftdatacite https://doi.org/10.5281/zenodo.6093742 https://doi.org/10.11646/zootaxa.3925.3.4 https://doi.org/10.5281/zenodo.236324 https://doi.org/10.5281/zenodo.6093741 2022-04-01T10:31:00Z Sertularella sacciformis sp. nov. (Figure 7) Material . Holotype: CANADA: British Columbia. Hecate Strait, Gwaii Haanas National Marine Park Reserve, 53 ˚ 32 ’ 48 ”N, 131 ˚ 19 ’ 30 ”W, 26. ix.1985, 26 meters, coll. R.O. Brinckhurst, hydrocaulus section, without gonothecae, ROMIZ B 2341. Paratype: CANADA: British Columbia. 54 ˚ 13 ’00”N, 132 ˚09’00”W, 29.iv. 1961, 98.8 meters, coll. D.B. Quayle, hydrocauli sections, without gonothecae, ROMIZ B 4070. Reported distribution . CANADA: British Columbia, Vancouver island, off Clayoquot Sound as Sertularella rugosa . Description . Hydrocaulus flexuous, stem geniculate; axis divided into internodes. Perisarc thin throughout. If present, ramifications arise from axis directly under axillary hydrotheca on same plane or angled perpendicularly. Ramification structure same as axis. Beginning of internode marked with two or three well-marked, oblique annular constrictions of perisarc. Internode segments narrowed basally, widening distally. Hydrothecae alternate, distant, one per internode on upper part, on same plane or slightly inclined, following ramification orientation; shape distinctly saccate basally, narrow distally. Saccate shape asymmetrical, adcauline side prominently protuberant. Adcauline wall approximately ¼ adnate, basal part of free portion fairly straight or moderately concavo-convex, distally inclined towards adcauline side. Distal portion of adcauline wall also slightly inclined outwards, forming slight concavity. Hydrothecae strongly annulated basally; apex of 3–4 annulations forming ribs or uneven, crested folds, widening towards adcauline side. Distal part of hydrothecae smooth, giving appearance of cylindrical neck, widening basally. Opercular opening rectangular, embayments shallow but flared, meeting to form four prominent cusps. Operculum of four triangular flaps, forming a low peak when closed. Intrathecal cusps not present. Gonothecae not found. Differential diagnosis . Due to the occasionally acute angle of the outward bend, the square-shaped hydrothecal aperture, and the general rugosity of the perisarc, the hydrothecae of Sertularella sacciformis can resemble those of S. rugosa (Linnaeus, 1758) or S. tenella . ROMIZ B 2341 was originally identified as S. rugosa , but S. rugosa lacks the smooth hydrothecal neck found in S. sacciformis . The absence or presence of a notch below the rim on the abcauline wall of the hydrotheca as seen from the side is considered to be a diagnostic feature separating S. rugosa from its congeners, although its systematic value has been questioned by some authors (Cornelius 1979, 1995; Schuchert 2001). Nevertheless, in S. sacciformis this notch is absent, although the appearance of a notch is occasionally approximated by the abcauline incline of the hydrothecal neck and the tumidity of the basal portion. This gives appearance of a notch, but the area below the hydrothecal rim is actually straight. In S. tenella , the hydrotheca resembles a broad-necked bottle, rather than the saccate, bent-neck shape of S. sacciformis . The nature of the rugosity is also different in all three species. In S. rugosa the encircling transverse ridges are sharp, forming deep furrows, which are especially marked on the abcauline side; in S. tenella , the sharp ridges which encircle the hydrotheca appear more evenly spaced, but in S. sacciformis , the annular segments form uneven, crested folds, widening towards the adcauline side. Moreover, in S. rugosa the colony tends to be poorly ramified on a single plane (Naumov 1969). In S. sacciformis , the stem is slender, and the hydrothecae are not as closely spaced as in S. rugosa . Etymology . The species name refers to the shape of the hydrothecae, from the Latin saccus (sack or pouchshaped). : Published as part of Choong, Henry H. C., 2015, Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species, pp. 387-408 in Zootaxa 3925 (3) on pages 402-404, DOI: 10.11646/zootaxa.3925.3.4, http://zenodo.org/record/236318 : {"references": ["Linnaeus, C. (1758) Systema naturae per regna tria naturae, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. Laurentii Salvii, Holmiae, 823 pp.", "Cornelius, P. F. S. (1979) A revision of the species of Sertulariidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bulletin of the British Museum (Natural History), Zoology, 34, 243 - 321.", "Cornelius, P. F. S. (1995) North-west European thecate hydroids and their medusae. Part 2. Sertulariidae to Campanulariidae. Synopses of the British Fauna, New Series, 50, 1 - 386.", "Schuchert, P. (2001) Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om Gronland, Bioscience, 53, 1 - 184."]} Text Greenland Iceland DataCite Metadata Store (German National Library of Science and Technology) Canada Greenland Pacific British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Rugosa ENVELOPE(-61.250,-61.250,-62.633,-62.633) Gronland ENVELOPE(70.203,70.203,-49.626,-49.626) Hecate Strait ENVELOPE(-131.170,-131.170,53.500,53.500) |