High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey
The most important causative agent of human diphyllobothriosis in South America, Diphyllobothrium pacificum, is transferred to the original genus Adenocephalus Nybelin, 1931; revised and redescribed on the basis of the evaluation of an extensive material collected mainly from northern fur seal, Call...
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ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0450741 2024-02-04T10:05:15+01:00 High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey Hernández-Orts, Jesús S. Scholz, T. (Tomáš) Brabec, J. (Jan) Kuzmina, T. Kuchta, R. (Roman) 2015 https://doi.org/10.1016/j.actatropica.2015.05.017 http://hdl.handle.net/11104/0252003 eng eng doi:10.1016/j.actatropica.2015.05.017 urn:pissn: 0001-706x urn:eissn: 1873-6254 http://hdl.handle.net/11104/0252003 biogeography Cestoda cox1 lsrDNA helminth Diphyllobothriidea diphyllobothriosis phylogeny Pseudophyllidea seals info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftczacademyscien https://doi.org/10.1016/j.actatropica.2015.05.017 2024-01-09T17:33:12Z The most important causative agent of human diphyllobothriosis in South America, Diphyllobothrium pacificum, is transferred to the original genus Adenocephalus Nybelin, 1931; revised and redescribed on the basis of the evaluation of an extensive material collected mainly from northern fur seal, Callorhinus ursinus, from St. Paul Island, Alaska. Detailed analysis of morphological and morphometrical data shows a high variability in most of the characteristics traditionally used in diagnosis of diphyllobothriid tapeworms. Phylogenetic analyses based on newly characterised sequences of mitochondrial cytochrome c oxidase subunit 1 and nuclear large subunit ribosomal RNA genes consistently reveal Adenocephalus pacificus as a sister lineage to the clade formed of the remaining Diphyllobothrium species and other genera (Digramma, Diplogonoporus, Ligula). Despite the generally similar morphology, A. pacificus can be differentiated from the closely related taxa in the presence of transverse papilla-like tegumental protuberances distributed anteriorly, separated by narrow semicircular grooves on the ventral surface of proglottids between their anterior margin and the anterior edge of the male gonopore, and relatively small eggs. A. pacificus displays a relatively low host specificity (found in 9 of 16 otariids, and in accidental hosts such as man, dog and jackal, the latter representing a new host) and a uniquely wide geographical distribution on both hemispheres. In addition, suitability of morphological criteria used in diagnostics of diphyllobothriid cestodes is discussed. Article in Journal/Newspaper Alaska Callorhinus ursinus Northern fur seal The Czech Academy of Sciences: Publication Activity (ASEP) Pacific Acta Tropica 149 168 178 |
institution |
Open Polar |
collection |
The Czech Academy of Sciences: Publication Activity (ASEP) |
op_collection_id |
ftczacademyscien |
language |
English |
topic |
biogeography Cestoda cox1 lsrDNA helminth Diphyllobothriidea diphyllobothriosis phylogeny Pseudophyllidea seals |
spellingShingle |
biogeography Cestoda cox1 lsrDNA helminth Diphyllobothriidea diphyllobothriosis phylogeny Pseudophyllidea seals Hernández-Orts, Jesús S. Scholz, T. (Tomáš) Brabec, J. (Jan) Kuzmina, T. Kuchta, R. (Roman) High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey |
topic_facet |
biogeography Cestoda cox1 lsrDNA helminth Diphyllobothriidea diphyllobothriosis phylogeny Pseudophyllidea seals |
description |
The most important causative agent of human diphyllobothriosis in South America, Diphyllobothrium pacificum, is transferred to the original genus Adenocephalus Nybelin, 1931; revised and redescribed on the basis of the evaluation of an extensive material collected mainly from northern fur seal, Callorhinus ursinus, from St. Paul Island, Alaska. Detailed analysis of morphological and morphometrical data shows a high variability in most of the characteristics traditionally used in diagnosis of diphyllobothriid tapeworms. Phylogenetic analyses based on newly characterised sequences of mitochondrial cytochrome c oxidase subunit 1 and nuclear large subunit ribosomal RNA genes consistently reveal Adenocephalus pacificus as a sister lineage to the clade formed of the remaining Diphyllobothrium species and other genera (Digramma, Diplogonoporus, Ligula). Despite the generally similar morphology, A. pacificus can be differentiated from the closely related taxa in the presence of transverse papilla-like tegumental protuberances distributed anteriorly, separated by narrow semicircular grooves on the ventral surface of proglottids between their anterior margin and the anterior edge of the male gonopore, and relatively small eggs. A. pacificus displays a relatively low host specificity (found in 9 of 16 otariids, and in accidental hosts such as man, dog and jackal, the latter representing a new host) and a uniquely wide geographical distribution on both hemispheres. In addition, suitability of morphological criteria used in diagnostics of diphyllobothriid cestodes is discussed. |
format |
Article in Journal/Newspaper |
author |
Hernández-Orts, Jesús S. Scholz, T. (Tomáš) Brabec, J. (Jan) Kuzmina, T. Kuchta, R. (Roman) |
author_facet |
Hernández-Orts, Jesús S. Scholz, T. (Tomáš) Brabec, J. (Jan) Kuzmina, T. Kuchta, R. (Roman) |
author_sort |
Hernández-Orts, Jesús S. |
title |
High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey |
title_short |
High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey |
title_full |
High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey |
title_fullStr |
High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey |
title_full_unstemmed |
High morphological plasticity and global geographical distribution ofthe Pacific broad tapeworm Adenocephalus pacificus (syn.Diphyllobothrium pacificum): Molecular and morphological survey |
title_sort |
high morphological plasticity and global geographical distribution ofthe pacific broad tapeworm adenocephalus pacificus (syn.diphyllobothrium pacificum): molecular and morphological survey |
publishDate |
2015 |
url |
https://doi.org/10.1016/j.actatropica.2015.05.017 http://hdl.handle.net/11104/0252003 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Alaska Callorhinus ursinus Northern fur seal |
genre_facet |
Alaska Callorhinus ursinus Northern fur seal |
op_relation |
doi:10.1016/j.actatropica.2015.05.017 urn:pissn: 0001-706x urn:eissn: 1873-6254 http://hdl.handle.net/11104/0252003 |
op_doi |
https://doi.org/10.1016/j.actatropica.2015.05.017 |
container_title |
Acta Tropica |
container_volume |
149 |
container_start_page |
168 |
op_container_end_page |
178 |
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1789974327447257088 |