Symplectoscyphus densus CANTERO, 2017, sp. nov.
Symplectoscyphus densus sp. nov. (Figs 3 C, 12D–E, 14) Material examined. Stn 7, fragment 5 mm long (paratype, NIWA 115618); Stn 97, stem 7 mm high, slightly polysiphonic basally (holotype, NIWA 115617). Description (Holotype). Stem 7 mm high, slightly polysiphonic basally (Fig. 3 C). Stem with side...
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ftzenodo:oai:zenodo.org:4386856 2023-06-06T11:46:32+02:00 Symplectoscyphus densus CANTERO, 2017, sp. nov. ÁLVARO L. PEÑA CANTERO 2017-07-14 https://zenodo.org/record/4386856 https://doi.org/10.5281/zenodo.4386856 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/C84B87CACC3FFF9CE8DD00DF0B10F07C doi:10.11646/zootaxa.4293.1.1 http://zenodo.org/record/828475 http://publication.plazi.org/id/3472FFB2CC16FFB5E84A00470F1FF553 doi:10.5281/zenodo.828481 doi:10.5281/zenodo.828499 doi:10.5281/zenodo.828503 http://zoobank.org/6FF96B5C-1F80-47ED-9962-19603DCBF550 doi:10.5281/zenodo.4386855 https://zenodo.org/communities/biosyslit https://zenodo.org/record/4386856 https://doi.org/10.5281/zenodo.4386856 oai:zenodo.org:4386856 info:eu-repo/semantics/openAccess Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293(1) 42 Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Symplectoscyphus Symplectoscyphus densus info:eu-repo/semantics/other publication-taxonomictreatment 2017 ftzenodo https://doi.org/10.5281/zenodo.438685610.11646/zootaxa.4293.1.110.5281/zenodo.82848110.5281/zenodo.82849910.5281/zenodo.82850310.5281/zenodo.4386855 2023-04-13T21:12:52Z Symplectoscyphus densus sp. nov. (Figs 3 C, 12D–E, 14) Material examined. Stn 7, fragment 5 mm long (paratype, NIWA 115618); Stn 97, stem 7 mm high, slightly polysiphonic basally (holotype, NIWA 115617). Description (Holotype). Stem 7 mm high, slightly polysiphonic basally (Fig. 3 C). Stem with side branch (Fig. 3 C). Hydrothecae closely packed, alternately arranged, approximately planar (Fig. 12 D, 14A–B); almost opposite distally. Plane of hydrothecae of side branch roughly perpendicular to that of stem. Hydrotheca elongate (Fig. 12 D, 14A–D), diameter distinctly decreasing distally from median part (Fig. 12 D, 14A–D), sometimes looking like a distal neck (Fig. 12 D). Hydrotheca straight at basal half, curving abcaudally at distal half (Fig. 12 D, 14C–D). Hydrotheca free over half its adcauline length (Fig. 12 D, 14C–D). Free part of adcauline wall roughly straight or slightly convex; abcauline wall straight or slightly convex basally, concave distally. Rim of hydrothecal aperture with three well-developed, blunt cusps (Fig. 14 E); adcauline one frequently longer than abcauline ones (Fig. 12 D, 14C–E), projecting farther. Measurements (in µm). Hydrothecae: length of abcauline wall 380–400, length free part of adcauline wall 250–275, length adnate part of adcauline wall 230–250, length adcauline wall 480–525, diameter at aperture 120–130, diameter at diaphragm 100–120, maximum diameter 150–160. Cnidome: larger microbasic mastigophores, range 9.0–10.0 x 2.0–2.5, mean 9.8±0.4 x 2.4±0.2 (n=5); ratio, range 4.0–4.5, mean 4.1±0.2 (n=5). Remarks. There is a side branch in the paratype, similar to the holotype, but the hydrothecae of the side branch of the paratype are in the same plane of those of the corresponding stem. The material studied differs from all known Antarctic species of Symplectoscyphus and is considered here to represent a new species to science. Notwithstanding the scarcity of material available, this species is perfectly recognizable, among the Antarctic species of Symplectoscyphus, by the shape and ... Other/Unknown Material Antarc* Antarctic Zenodo Antarctic The Antarctic |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Symplectoscyphus Symplectoscyphus densus |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Symplectoscyphus Symplectoscyphus densus ÁLVARO L. PEÑA CANTERO Symplectoscyphus densus CANTERO, 2017, sp. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Sertulariidae Symplectoscyphus Symplectoscyphus densus |
description |
Symplectoscyphus densus sp. nov. (Figs 3 C, 12D–E, 14) Material examined. Stn 7, fragment 5 mm long (paratype, NIWA 115618); Stn 97, stem 7 mm high, slightly polysiphonic basally (holotype, NIWA 115617). Description (Holotype). Stem 7 mm high, slightly polysiphonic basally (Fig. 3 C). Stem with side branch (Fig. 3 C). Hydrothecae closely packed, alternately arranged, approximately planar (Fig. 12 D, 14A–B); almost opposite distally. Plane of hydrothecae of side branch roughly perpendicular to that of stem. Hydrotheca elongate (Fig. 12 D, 14A–D), diameter distinctly decreasing distally from median part (Fig. 12 D, 14A–D), sometimes looking like a distal neck (Fig. 12 D). Hydrotheca straight at basal half, curving abcaudally at distal half (Fig. 12 D, 14C–D). Hydrotheca free over half its adcauline length (Fig. 12 D, 14C–D). Free part of adcauline wall roughly straight or slightly convex; abcauline wall straight or slightly convex basally, concave distally. Rim of hydrothecal aperture with three well-developed, blunt cusps (Fig. 14 E); adcauline one frequently longer than abcauline ones (Fig. 12 D, 14C–E), projecting farther. Measurements (in µm). Hydrothecae: length of abcauline wall 380–400, length free part of adcauline wall 250–275, length adnate part of adcauline wall 230–250, length adcauline wall 480–525, diameter at aperture 120–130, diameter at diaphragm 100–120, maximum diameter 150–160. Cnidome: larger microbasic mastigophores, range 9.0–10.0 x 2.0–2.5, mean 9.8±0.4 x 2.4±0.2 (n=5); ratio, range 4.0–4.5, mean 4.1±0.2 (n=5). Remarks. There is a side branch in the paratype, similar to the holotype, but the hydrothecae of the side branch of the paratype are in the same plane of those of the corresponding stem. The material studied differs from all known Antarctic species of Symplectoscyphus and is considered here to represent a new species to science. Notwithstanding the scarcity of material available, this species is perfectly recognizable, among the Antarctic species of Symplectoscyphus, by the shape and ... |
format |
Other/Unknown Material |
author |
ÁLVARO L. PEÑA CANTERO |
author_facet |
ÁLVARO L. PEÑA CANTERO |
author_sort |
ÁLVARO L. PEÑA CANTERO |
title |
Symplectoscyphus densus CANTERO, 2017, sp. nov. |
title_short |
Symplectoscyphus densus CANTERO, 2017, sp. nov. |
title_full |
Symplectoscyphus densus CANTERO, 2017, sp. nov. |
title_fullStr |
Symplectoscyphus densus CANTERO, 2017, sp. nov. |
title_full_unstemmed |
Symplectoscyphus densus CANTERO, 2017, sp. nov. |
title_sort |
symplectoscyphus densus cantero, 2017, sp. nov. |
publishDate |
2017 |
url |
https://zenodo.org/record/4386856 https://doi.org/10.5281/zenodo.4386856 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293(1) 42 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/C84B87CACC3FFF9CE8DD00DF0B10F07C doi:10.11646/zootaxa.4293.1.1 http://zenodo.org/record/828475 http://publication.plazi.org/id/3472FFB2CC16FFB5E84A00470F1FF553 doi:10.5281/zenodo.828481 doi:10.5281/zenodo.828499 doi:10.5281/zenodo.828503 http://zoobank.org/6FF96B5C-1F80-47ED-9962-19603DCBF550 doi:10.5281/zenodo.4386855 https://zenodo.org/communities/biosyslit https://zenodo.org/record/4386856 https://doi.org/10.5281/zenodo.4386856 oai:zenodo.org:4386856 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.438685610.11646/zootaxa.4293.1.110.5281/zenodo.82848110.5281/zenodo.82849910.5281/zenodo.82850310.5281/zenodo.4386855 |
_version_ |
1767951887131213824 |