A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica
Polygordius antarcticus sp. nov. is described from benthic material collected at depths ranging between 31 and 61 m in Terra Nova Bay, Ross Sea, during the 1987-1988 and 1988-1989 expeditions of the Italian National Research Program in Antarctica. This is the first named species of the genus from An...
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Springer Berlin Heidelberg
1999
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Online Access: | http://hdl.handle.net/2108/55252 https://doi.org/10.1007/s003000050354 |
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ftunivromatorver:oai:art.torvergata.it:2108/55252 2024-02-27T08:33:26+00:00 A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica Rota, E CARCHINI, GIAN MARIA Rota, E Carchini, Gm 1999 http://hdl.handle.net/2108/55252 https://doi.org/10.1007/s003000050354 eng eng Springer Berlin Heidelberg place:NEW YORK info:eu-repo/semantics/altIdentifier/wos/WOS:000079518700001 volume:21 issue:4 firstpage:201 lastpage:213 journal:POLAR BIOLOGY http://hdl.handle.net/2108/55252 doi:10.1007/s003000050354 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0032896280 benthic infauna morphology new specie Ross Sea Polygordius antarcticu Polygordius triestinus Settore BIO/05 - ZOOLOGIA info:eu-repo/semantics/article 1999 ftunivromatorver https://doi.org/10.1007/s003000050354 2024-01-31T00:02:18Z Polygordius antarcticus sp. nov. is described from benthic material collected at depths ranging between 31 and 61 m in Terra Nova Bay, Ross Sea, during the 1987-1988 and 1988-1989 expeditions of the Italian National Research Program in Antarctica. This is the first named species of the genus from Antarctic waters. Although no fully mature specimens were available, the new species appears unique in combining the following features: a regular pygidium, inflated and with a single ring of round adhesive pads, a conical prostomium with short antennae (only half as long as the prostomium) and shallow head fold, and a well-developed circulatory apparatus, with circumoesophageal commissures entering the prostomium and long intersegmental commissures insinuating into the ventrolateral compartments of the trunk. These and other significant features were investigated by light and scanning electron microscopy. In the construction of the head and the scheme of the blood system, the new species resembles Polygordius triestinus Woltereck, described by Hempelmann in 1906, an aberrant species inhabiting muddy, anoxic sediments in the Adriatic Sea, but it differs significantly from it in the shape of the mouth (in P. triestinus the upper lip is hypertrophied and strongly protruding) and the pygidium (in P. triestinus this region is stump-like and non-adhesive). The pygidium of P. antarcticus sp, nov. is encircled by 28-30 small adhesive pads, each with 15-20 glandular openings. Preterminal cirri are lacking, as are perianal appendages. The anus is surrounded by six to seven lobes of which the midventral is largest and longest. A world distribution map of the genus is provided. Article in Journal/Newspaper Antarc* Antarctic Antarctica antarcticus Ross Sea Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca Antarctic Ross Sea Terra Nova Bay Stump ENVELOPE(-153.167,-153.167,-86.183,-86.183) Polar Biology 21 4 201 213 |
institution |
Open Polar |
collection |
Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca |
op_collection_id |
ftunivromatorver |
language |
English |
topic |
benthic infauna morphology new specie Ross Sea Polygordius antarcticu Polygordius triestinus Settore BIO/05 - ZOOLOGIA |
spellingShingle |
benthic infauna morphology new specie Ross Sea Polygordius antarcticu Polygordius triestinus Settore BIO/05 - ZOOLOGIA Rota, E CARCHINI, GIAN MARIA A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica |
topic_facet |
benthic infauna morphology new specie Ross Sea Polygordius antarcticu Polygordius triestinus Settore BIO/05 - ZOOLOGIA |
description |
Polygordius antarcticus sp. nov. is described from benthic material collected at depths ranging between 31 and 61 m in Terra Nova Bay, Ross Sea, during the 1987-1988 and 1988-1989 expeditions of the Italian National Research Program in Antarctica. This is the first named species of the genus from Antarctic waters. Although no fully mature specimens were available, the new species appears unique in combining the following features: a regular pygidium, inflated and with a single ring of round adhesive pads, a conical prostomium with short antennae (only half as long as the prostomium) and shallow head fold, and a well-developed circulatory apparatus, with circumoesophageal commissures entering the prostomium and long intersegmental commissures insinuating into the ventrolateral compartments of the trunk. These and other significant features were investigated by light and scanning electron microscopy. In the construction of the head and the scheme of the blood system, the new species resembles Polygordius triestinus Woltereck, described by Hempelmann in 1906, an aberrant species inhabiting muddy, anoxic sediments in the Adriatic Sea, but it differs significantly from it in the shape of the mouth (in P. triestinus the upper lip is hypertrophied and strongly protruding) and the pygidium (in P. triestinus this region is stump-like and non-adhesive). The pygidium of P. antarcticus sp, nov. is encircled by 28-30 small adhesive pads, each with 15-20 glandular openings. Preterminal cirri are lacking, as are perianal appendages. The anus is surrounded by six to seven lobes of which the midventral is largest and longest. A world distribution map of the genus is provided. |
author2 |
Rota, E Carchini, Gm |
format |
Article in Journal/Newspaper |
author |
Rota, E CARCHINI, GIAN MARIA |
author_facet |
Rota, E CARCHINI, GIAN MARIA |
author_sort |
Rota, E |
title |
A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica |
title_short |
A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica |
title_full |
A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica |
title_fullStr |
A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica |
title_full_unstemmed |
A new Polygordius (Annelida: Polychaeta) from Terra Nova Bay, Ross Sea, Antarctica |
title_sort |
new polygordius (annelida: polychaeta) from terra nova bay, ross sea, antarctica |
publisher |
Springer Berlin Heidelberg |
publishDate |
1999 |
url |
http://hdl.handle.net/2108/55252 https://doi.org/10.1007/s003000050354 |
long_lat |
ENVELOPE(-153.167,-153.167,-86.183,-86.183) |
geographic |
Antarctic Ross Sea Terra Nova Bay Stump |
geographic_facet |
Antarctic Ross Sea Terra Nova Bay Stump |
genre |
Antarc* Antarctic Antarctica antarcticus Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica antarcticus Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000079518700001 volume:21 issue:4 firstpage:201 lastpage:213 journal:POLAR BIOLOGY http://hdl.handle.net/2108/55252 doi:10.1007/s003000050354 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0032896280 |
op_doi |
https://doi.org/10.1007/s003000050354 |
container_title |
Polar Biology |
container_volume |
21 |
container_issue |
4 |
container_start_page |
201 |
op_container_end_page |
213 |
_version_ |
1792045677358874624 |