Hydractinia angusta Hartlaub 1904
Hydractinia angusta Hartlaub, 1904 (Pl. 1 A–E, Fig. 2 A–C) Hydractinia angusta Hartlaub, 1904: 7, pl. 4. — Naumov & Stepanjants, 1972: 35, fig. 1. — Stepanjants, 1979: 13, pl. 1 fig. 7. — Peña Cantero & Ramil, 2006: 950, fig. 2 A. — Peña Cantero, 2012: 855. Hydronema angustum — Stechow, 1923...
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ftzenodo:oai:zenodo.org:3506944 2023-05-15T13:55:25+02:00 Hydractinia angusta Hartlaub 1904 Galea, Horia R. Schories, Dirk 2012-12-31 https://zenodo.org/record/3506944 https://doi.org/10.5281/zenodo.3506944 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/170887E3F447161EFF194B2EEB2D2400 doi:10.5281/zenodo.213236 http://publication.plazi.org/id/EB31FF9BF446161FFF8E4803EF1C224D doi:10.5281/zenodo.213238 doi:10.5281/zenodo.3506943 https://zenodo.org/communities/biosyslit https://zenodo.org/record/3506944 https://doi.org/10.5281/zenodo.3506944 oai:zenodo.org:3506944 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Some hydrozoans (Cnidaria) from King George Island, Antarctica, pp. 1-21 in Zootaxa 3321 2 Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Hydractiniidae Hydractinia Hydractinia angusta info:eu-repo/semantics/other publication-taxonomictreatment 2012 ftzenodo https://doi.org/10.5281/zenodo.350694410.5281/zenodo.21323610.5281/zenodo.21323810.5281/zenodo.3506943 2023-03-10T16:09:21Z Hydractinia angusta Hartlaub, 1904 (Pl. 1 A–E, Fig. 2 A–C) Hydractinia angusta Hartlaub, 1904: 7, pl. 4. — Naumov & Stepanjants, 1972: 35, fig. 1. — Stepanjants, 1979: 13, pl. 1 fig. 7. — Peña Cantero & Ramil, 2006: 950, fig. 2 A. — Peña Cantero, 2012: 855. Hydronema angustum — Stechow, 1923: 67. — Totton, 1930: 138. — Briggs, 1939: 10. Hydractinia dendritica Hickson & Gravely, 1907: 9, pl. 2 figs 7–10. Hydronema dendriticum — Stechow, 1921: 252. — Stechow, 1923: 67, fig. F. ? Hydractinia sp. —Stepanjants, 1972: 59, fig. 4. Material examined. Stn. SHO — 16.ii. 2011, Ant.09/ 2011 (43 m): fertile (female) colony on worm tube (MHNG- INVE- 79798). Stn. ARD — 28.i. 2011, Ant. 11 / 2011 (39 m): fertile (female) colony on worm tube (MHNG-INVE- 79799). Description. Hydrorhiza an encrusting mat issued through the coalescence of the stolonal system, covered by naked coenosarc (Pl. 1 C). Spines present, often continuous with each other (Pl. 1 D), provided with low ridges of perisarc (Pl. 1 E), open or closed at tips. Polyps dimorphic: gastro- and gonozooids. Gastrozooids up to 5 mm high in fixed material, notably longer in life (Pl. 1 A); with 12–14 amphicoronate tentacles and dome-shaped hypostome. Gonozooids dwarfed, less than 0.5 mm high, and degenerate, with 1–5 tentacles, and possibly no mouth; 4–6 rounded gonophores basally, each carrying three eggs. Nematocysts: desmonemes (6.0– 6.5) × (3.6–3.8) µm and microbasic euryteles (8.9–9.8) × (3.1–3.5) µm (both measured undischarged). Remarks. Totton (1930) reexamined the type of H. dendritica Hickson & Gravely, 1907 and suggested that it could reasonably be considered as conspecific with Hartlaub's (1904) species, an opinion which is followed here. Geographical distribution. Circum-Antarctic (Peña Cantero & Ramil 2006). Published as part of Galea, Horia R. & Schories, Dirk, 2012, Some hydrozoans (Cnidaria) from King George Island, Antarctica, pp. 1-21 in Zootaxa 3321 on page 2, DOI:10.5281/zenodo.213236 Other/Unknown Material Antarc* Antarctic Antarctica King George Island Zenodo Antarctic Briggs ENVELOPE(-63.017,-63.017,-64.517,-64.517) King George Island |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Hydractiniidae Hydractinia Hydractinia angusta |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Hydractiniidae Hydractinia Hydractinia angusta Galea, Horia R. Schories, Dirk Hydractinia angusta Hartlaub 1904 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Hydractiniidae Hydractinia Hydractinia angusta |
description |
Hydractinia angusta Hartlaub, 1904 (Pl. 1 A–E, Fig. 2 A–C) Hydractinia angusta Hartlaub, 1904: 7, pl. 4. — Naumov & Stepanjants, 1972: 35, fig. 1. — Stepanjants, 1979: 13, pl. 1 fig. 7. — Peña Cantero & Ramil, 2006: 950, fig. 2 A. — Peña Cantero, 2012: 855. Hydronema angustum — Stechow, 1923: 67. — Totton, 1930: 138. — Briggs, 1939: 10. Hydractinia dendritica Hickson & Gravely, 1907: 9, pl. 2 figs 7–10. Hydronema dendriticum — Stechow, 1921: 252. — Stechow, 1923: 67, fig. F. ? Hydractinia sp. —Stepanjants, 1972: 59, fig. 4. Material examined. Stn. SHO — 16.ii. 2011, Ant.09/ 2011 (43 m): fertile (female) colony on worm tube (MHNG- INVE- 79798). Stn. ARD — 28.i. 2011, Ant. 11 / 2011 (39 m): fertile (female) colony on worm tube (MHNG-INVE- 79799). Description. Hydrorhiza an encrusting mat issued through the coalescence of the stolonal system, covered by naked coenosarc (Pl. 1 C). Spines present, often continuous with each other (Pl. 1 D), provided with low ridges of perisarc (Pl. 1 E), open or closed at tips. Polyps dimorphic: gastro- and gonozooids. Gastrozooids up to 5 mm high in fixed material, notably longer in life (Pl. 1 A); with 12–14 amphicoronate tentacles and dome-shaped hypostome. Gonozooids dwarfed, less than 0.5 mm high, and degenerate, with 1–5 tentacles, and possibly no mouth; 4–6 rounded gonophores basally, each carrying three eggs. Nematocysts: desmonemes (6.0– 6.5) × (3.6–3.8) µm and microbasic euryteles (8.9–9.8) × (3.1–3.5) µm (both measured undischarged). Remarks. Totton (1930) reexamined the type of H. dendritica Hickson & Gravely, 1907 and suggested that it could reasonably be considered as conspecific with Hartlaub's (1904) species, an opinion which is followed here. Geographical distribution. Circum-Antarctic (Peña Cantero & Ramil 2006). Published as part of Galea, Horia R. & Schories, Dirk, 2012, Some hydrozoans (Cnidaria) from King George Island, Antarctica, pp. 1-21 in Zootaxa 3321 on page 2, DOI:10.5281/zenodo.213236 |
format |
Other/Unknown Material |
author |
Galea, Horia R. Schories, Dirk |
author_facet |
Galea, Horia R. Schories, Dirk |
author_sort |
Galea, Horia R. |
title |
Hydractinia angusta Hartlaub 1904 |
title_short |
Hydractinia angusta Hartlaub 1904 |
title_full |
Hydractinia angusta Hartlaub 1904 |
title_fullStr |
Hydractinia angusta Hartlaub 1904 |
title_full_unstemmed |
Hydractinia angusta Hartlaub 1904 |
title_sort |
hydractinia angusta hartlaub 1904 |
publishDate |
2012 |
url |
https://zenodo.org/record/3506944 https://doi.org/10.5281/zenodo.3506944 |
long_lat |
ENVELOPE(-63.017,-63.017,-64.517,-64.517) |
geographic |
Antarctic Briggs King George Island |
geographic_facet |
Antarctic Briggs King George Island |
genre |
Antarc* Antarctic Antarctica King George Island |
genre_facet |
Antarc* Antarctic Antarctica King George Island |
op_source |
Some hydrozoans (Cnidaria) from King George Island, Antarctica, pp. 1-21 in Zootaxa 3321 2 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/170887E3F447161EFF194B2EEB2D2400 doi:10.5281/zenodo.213236 http://publication.plazi.org/id/EB31FF9BF446161FFF8E4803EF1C224D doi:10.5281/zenodo.213238 doi:10.5281/zenodo.3506943 https://zenodo.org/communities/biosyslit https://zenodo.org/record/3506944 https://doi.org/10.5281/zenodo.3506944 oai:zenodo.org:3506944 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.350694410.5281/zenodo.21323610.5281/zenodo.21323810.5281/zenodo.3506943 |
_version_ |
1766262022505234432 |