The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae)
Abstract Parasitic ‘turbellarians’ are known from various animals such as echinoderms, crustaceans, annelids, bivalve and gastropod molluscs. So far, however, no ‘turbellarians’ have been reported from cephalopods. In this paper we report a parasitic ‘turbellarian’ from the giant Antarctic octopus,...
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Cambridge University Press (CUP)
2022
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Online Access: | http://dx.doi.org/10.1017/s0022149x22000657 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X22000657 |
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crcambridgeupr:10.1017/s0022149x22000657 2024-03-03T08:38:31+00:00 The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) Gordeev, I. Biserova, N. Zhukova, K. Ekimova, I. 2022 http://dx.doi.org/10.1017/s0022149x22000657 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X22000657 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Helminthology volume 96 ISSN 0022-149X 1475-2697 Animal Science and Zoology General Medicine Parasitology journal-article 2022 crcambridgeupr https://doi.org/10.1017/s0022149x22000657 2024-02-08T08:45:06Z Abstract Parasitic ‘turbellarians’ are known from various animals such as echinoderms, crustaceans, annelids, bivalve and gastropod molluscs. So far, however, no ‘turbellarians’ have been reported from cephalopods. In this paper we report a parasitic ‘turbellarian’ from the giant Antarctic octopus, Megaleledone setebos . We dissected two specimens of M. setebos caught in the Ross Sea (Antarctica) and found numerous worms in their intestine and liver. The worms were spherical or oblong and had two morphologically different poles. The frontal pole bears a small conical protrusion containing large elongated pear-shaped frontal glands and large polygonal cells. The ducts of the frontal glands open terminally to form the frontal organ. The caudal pole has an opening shaped as a folded tube connected by the genital pore with a common genital atrium, which continues into a canal with a muscular sheath. The worms were identified as ‘turbellarians’ from the family Notenteridae (Fecampiida). This family contains only one species, Notentera ivanovi , reported from the gut of a polychaete at the White Sea. The worms that we found in the gastrointestinal tract of the octopuses were morphologically similar to N. ivanovi but differed from it in several important respects. Phylogenetic analysis based on 28S rDNA gene showed that the newly found worm clustered together with other fecampiids in a highly supported clade and was closely related to N. ivanovi . On the basis of these morphological and molecular data, we described a new species, Octopoxenus antarcticus gen. nov., sp. nov. (Fecampiida: Notenteridae), establishing a new genus to accommodate it and provided an updated diagnosis of the family Notenteridae. This is the first report of a parasitic ‘turbellarian’ from a cephalopod mollusc. Article in Journal/Newspaper Antarc* Antarctic Antarctic Octopus Antarctica antarcticus Giant Antarctic Octopus Megaleledone Setebos Ross Sea White Sea Cambridge University Press Antarctic Ross Sea White Sea Journal of Helminthology 96 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Animal Science and Zoology General Medicine Parasitology |
spellingShingle |
Animal Science and Zoology General Medicine Parasitology Gordeev, I. Biserova, N. Zhukova, K. Ekimova, I. The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) |
topic_facet |
Animal Science and Zoology General Medicine Parasitology |
description |
Abstract Parasitic ‘turbellarians’ are known from various animals such as echinoderms, crustaceans, annelids, bivalve and gastropod molluscs. So far, however, no ‘turbellarians’ have been reported from cephalopods. In this paper we report a parasitic ‘turbellarian’ from the giant Antarctic octopus, Megaleledone setebos . We dissected two specimens of M. setebos caught in the Ross Sea (Antarctica) and found numerous worms in their intestine and liver. The worms were spherical or oblong and had two morphologically different poles. The frontal pole bears a small conical protrusion containing large elongated pear-shaped frontal glands and large polygonal cells. The ducts of the frontal glands open terminally to form the frontal organ. The caudal pole has an opening shaped as a folded tube connected by the genital pore with a common genital atrium, which continues into a canal with a muscular sheath. The worms were identified as ‘turbellarians’ from the family Notenteridae (Fecampiida). This family contains only one species, Notentera ivanovi , reported from the gut of a polychaete at the White Sea. The worms that we found in the gastrointestinal tract of the octopuses were morphologically similar to N. ivanovi but differed from it in several important respects. Phylogenetic analysis based on 28S rDNA gene showed that the newly found worm clustered together with other fecampiids in a highly supported clade and was closely related to N. ivanovi . On the basis of these morphological and molecular data, we described a new species, Octopoxenus antarcticus gen. nov., sp. nov. (Fecampiida: Notenteridae), establishing a new genus to accommodate it and provided an updated diagnosis of the family Notenteridae. This is the first report of a parasitic ‘turbellarian’ from a cephalopod mollusc. |
format |
Article in Journal/Newspaper |
author |
Gordeev, I. Biserova, N. Zhukova, K. Ekimova, I. |
author_facet |
Gordeev, I. Biserova, N. Zhukova, K. Ekimova, I. |
author_sort |
Gordeev, I. |
title |
The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) |
title_short |
The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) |
title_full |
The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) |
title_fullStr |
The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) |
title_full_unstemmed |
The first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae) |
title_sort |
first report of a parasitic ‘turbellarian’ from a cephalopod mollusc, with description of octopoxenus antarcticus gen. nov., sp. nov. (platyhelminthes: fecampiida: notenteridae) |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/s0022149x22000657 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X22000657 |
geographic |
Antarctic Ross Sea White Sea |
geographic_facet |
Antarctic Ross Sea White Sea |
genre |
Antarc* Antarctic Antarctic Octopus Antarctica antarcticus Giant Antarctic Octopus Megaleledone Setebos Ross Sea White Sea |
genre_facet |
Antarc* Antarctic Antarctic Octopus Antarctica antarcticus Giant Antarctic Octopus Megaleledone Setebos Ross Sea White Sea |
op_source |
Journal of Helminthology volume 96 ISSN 0022-149X 1475-2697 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0022149x22000657 |
container_title |
Journal of Helminthology |
container_volume |
96 |
_version_ |
1792506907999600640 |