KFU. Card publication. The first report of a parasitic 'turbellarian' from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae).

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THE FIRST REPORT OF A PARASITIC 'TURBELLARIAN' FROM A CEPHALOPOD MOLLUSC, WITH DES&SHY;CRIPTION OF OCTOPOXENUS ANTARCTICUS GEN. NOV., SP. NOV. (PLATYHELMINTHES: FECAMPIIDA: NOTENTERIDAE).

Form of presentation

Articles in international journals and collections

Year of publication

2023

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Authors, employees of KFU

Biserova Natalya Mikhaylovna, author

Bibliographic description in the original language

Gordeev I., Biserova N., Zhukova K., Ekimova I. 2022. The first report of a parasitic 'turbellarian' from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae). Journal of Helminthology. V.26. Pp1-11. DOI: 10.1017/S0022149X22000657

Annotation

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.

Keywords

Platyhelminthes, Turbellaria, microscopic anatomy, cephalopoda

The name of the journal

Journal of Helminthology

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=280867&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Biserova Natalya Mikhaylovna	ru_RU
dc.date.accessioned	2023-01-01T00:00:00Z	ru_RU
dc.date.available	2023-01-01T00:00:00Z	ru_RU
dc.date.issued	2023	ru_RU
dc.identifier.citation	Gordeev I., Biserova N., Zhukova K., Ekimova I. 2022. The first report of a parasitic 'turbellarian' from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae). Journal of Helminthology. V.26. Pp1-11. DOI: 10.1017/S0022149X22000657	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=280867&p_lang=2	ru_RU
dc.description.abstract	Journal of Helminthology	ru_RU
dc.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.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Platyhelminthes	ru_RU
dc.subject	Turbellaria	ru_RU
dc.subject	microscopic anatomy	ru_RU
dc.subject	cephalopoda	ru_RU
dc.title	The first report of a parasitic 'turbellarian' from a cephalopod mollusc, with description of Octopoxenus antarcticus gen. nov., sp. nov. (Platyhelminthes: Fecampiida: Notenteridae).	ru_RU
dc.type	Articles in international journals and collections	ru_RU