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Halecium interpolatum

Halecium interpolatum

Ritchie, 1907

GBIF:146019680

0year

ABOUT

Descriptions(4)

Ecology and distribution. Our material was collected at depths from 325 to 409 m, epibiotic on Symplectoscyphus glacialis. Watson’s (2008) material was found at a depth of 4 – 13 m, in Commonwealth Bay. Circum-Antarctic distribution (Peña Cantero 2014 c).
Peña Cantero, Álvaro L., Marzal, Marina Fresneda (2018): Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica). Zootaxa 4441 (1): 121-136, DOI: 10.11646/zootaxa.4441.1.7
Halecium interpolatum — watson, 2008: 171 – 172, fig. 7 A, B; Peña Cantero, 2014 c: 261 – 263, figs 5 G – J, 8 A – B (synonymy).
Peña Cantero, Álvaro L., Marzal, Marina Fresneda (2018): Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica). Zootaxa 4441 (1): 121-136, DOI: 10.11646/zootaxa.4441.1.7
Remarks. Incipient stems with up to two hydrothecae. Species easily recognizable by the characteristic long and straight basal part of internodes (Fig. 3 F) and the size of the microbasic eurytele nematocysts (10 X 5 µm).
Peña Cantero, Álvaro L., Marzal, Marina Fresneda (2018): Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica). Zootaxa 4441 (1): 121-136, DOI: 10.11646/zootaxa.4441.1.7
Material examined. 48 EV 194, a few tiny stems up to 2 mm high, on S. glacialis (IK – 2012 – 10437).
Peña Cantero, Álvaro L., Marzal, Marina Fresneda (2018): Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica). Zootaxa 4441 (1): 121-136, DOI: 10.11646/zootaxa.4441.1.7

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CLASSIFICATION

Taxonomic Classification Tree

AnimaliaCnidariaHydrozoaLeptothecataHaleciidaeHaleciumHalecium interpolatum

MULTIMEDIA

Media Files(1)

FIGURE 3. Staurotheca antarctica Hartlaub, 1904: A, hydrothecae. Staurotheca nonscripta Peña Cantero, Svoboda & Vervoort, 1997: B, hydrotheca. Staurotheca pachyclada (Jäderholm, 1904): C, hydrotheca. Antarctoscyphus spiralis (Hickson & Gravely, 1907): D, internode with hydrotheca showing intrathecal cusps (arrow). Symplectoscyphus glacialis (Jäderholm, 1904): E, internode with hydrotheca. Halecium interpolatum Ritchie, 1907: F, incipient stem with distal hydrotheca (arrow pointing to characteristic long and straight basal part of internode). Abietinella operculata (Jäderholm, 1903): G, hydrotheca (arrow pointing to disc-shaped operculum) and nematotheca (arrow). Schizotricha nana Peña Cantero, Svoboda & Vervoort, 1996: H, unforked hydrocladial internodes showing hydrothecae and nematothecae. Oswaldella erratum Peña Cantero & Vervoort, 1997: I, hydrocladial internode showing hydrotheca and mesial inferior nematotheca (arrow). Scale bars: 200 µm.

Imageimage/png© Peña Cantero, Álvaro L.;Marzal, Marina FresnedaPeña Cantero, Álvaro L.;Marzal, Marina Fresneda

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Source Information

Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica)

checklist

This dataset contains the digitized treatments in Plazi based on the original journal article Peña Cantero, Álvaro L., Marzal, Marina Fresneda (2018): Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica). Zootaxa 4441 (1): 121-136, DOI: 10.11646/zootaxa.4441.1.7

Abstract

Hydrozoans are one of the main and most characteristic zoological groups of Antarctic benthic communities, yet there are Antarctic areas where the hydrozoan fauna is completely unknown or scarcely known as off George V Coast (East Antarctica). Hitherto, only two studies have dealt with hydroids from this area and only 16 species have been reported. The present study contributes to increase knowledge of the benthic hydroid fauna off George V Coast by studying material collected during a sampling survey associated with the CEAMARC project. A total of 12 species of benthic hydroids were found. Anthoathecata is only represented by Bimeria corynopsis, the remaining species, including Schizotricha auroraaustralis sp. nov., belong to Leptothecata. Seven of the 12 species found in the study represent new records for the area; therefore, the number of benthic hydroids known off George V Coast is raised to 23. Staurotheca is the most speciose genus, represented by three species, followed by Schizotricha with two; the remaining genera are each represented by a single species. All species are restricted to Antarctic or Antarctic/sub-Antarctic waters. Nine species (75%) are endemic to the Antarctic region, most with a circum-Antarctic distribution (7 species); only two are endemic to East Antarctica. Three species are also distributed in sub-Antarctic waters.

Peña Cantero Á L, Marzal M F, plazi (2018). Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica). Plazi.org taxonomic treatments database. Checklist dataset https://doi.org/10.11646/zootaxa.4441.1.7 accessed via GBIF.org on 2026-06-16.

CC0Published 6/26/2018View dataset
GBIF Usage Key
146019680
Dataset Key
0535eaeb-2e3b-4b6d-9ced-58a61fd02e03
Origin
source
Backbone Key
2268537
Taxon ID
03AC2855FF8CFFB3E7FE7AAC6BC1282F.taxon
Last Crawled
6/10/2026
Last Interpreted
6/10/2026
View on GBIFSource Reference