Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae)
Abstract Among Antarctic amphipods of the genus Eusirus, a highly distinctive clade of giant species is characterized by a dorsal, blade-shaped tooth on pereionites 5–7 and pleonites 1–3. This lineage, herein named ‘crested Eusirus’, includes two potential species complexes, the Eusirus perdentatus...
Published in: | Zoological Journal of the Linnean Society |
---|---|
Main Authors: | , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1093/zoolinnean/zlaa141 https://academic.oup.com/zoolinnean/article-pdf/193/1/31/49555553/zlaa141.pdf |
id |
croxfordunivpr:10.1093/zoolinnean/zlaa141 |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1093/zoolinnean/zlaa141 2023-11-12T04:06:33+01:00 Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) Verheye, Marie L D’Udekem D’Acoz, Cédric Australian Antarctic Division Institut polaire français Paul Émile Victor Fonds Léopold III 2020 http://dx.doi.org/10.1093/zoolinnean/zlaa141 https://academic.oup.com/zoolinnean/article-pdf/193/1/31/49555553/zlaa141.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights Zoological Journal of the Linnean Society volume 193, issue 1, page 31-77 ISSN 0024-4082 1096-3642 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2020 croxfordunivpr https://doi.org/10.1093/zoolinnean/zlaa141 2023-10-13T10:52:59Z Abstract Among Antarctic amphipods of the genus Eusirus, a highly distinctive clade of giant species is characterized by a dorsal, blade-shaped tooth on pereionites 5–7 and pleonites 1–3. This lineage, herein named ‘crested Eusirus’, includes two potential species complexes, the Eusirus perdentatus and Eusirus giganteus complexes, in addition to the more distinctive Eusirus propeperdentatus. Molecular phylogenies and statistical parsimony networks (COI, CytB and ITS2) of crested Eusirus are herein reconstructed. This study aims to formally revise species diversity within crested Eusirus by applying several species delimitation methods (Bayesian implementation of the Poisson tree processes model, general mixed Yule coalescent, multi-rate Poisson tree processes and automatic barcode gap discovery) on the resulting phylogenies. In addition, results from the DNA-based methods are benchmarked against a detailed morphological analysis of all available specimens of the E. perdentatus complex. Our results indicate that species diversity of crested Eusirus is underestimated. Overall, DNA-based methods suggest that the E. perdentatus complex is composed of three putative species and that the E. giganteus complex includes four or five putative species. The morphological analysis of available specimens from the E. perdentatus complex corroborates molecular results by identifying two differentiable species, the genuine E. perdentatus and a new species, herein described as Eusirus pontomedon sp. nov. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Oxford University Press (via Crossref) Antarctic Southern Ocean Giganteus ENVELOPE(62.500,62.500,-67.567,-67.567) Zoological Journal of the Linnean Society |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Verheye, Marie L D’Udekem D’Acoz, Cédric Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Among Antarctic amphipods of the genus Eusirus, a highly distinctive clade of giant species is characterized by a dorsal, blade-shaped tooth on pereionites 5–7 and pleonites 1–3. This lineage, herein named ‘crested Eusirus’, includes two potential species complexes, the Eusirus perdentatus and Eusirus giganteus complexes, in addition to the more distinctive Eusirus propeperdentatus. Molecular phylogenies and statistical parsimony networks (COI, CytB and ITS2) of crested Eusirus are herein reconstructed. This study aims to formally revise species diversity within crested Eusirus by applying several species delimitation methods (Bayesian implementation of the Poisson tree processes model, general mixed Yule coalescent, multi-rate Poisson tree processes and automatic barcode gap discovery) on the resulting phylogenies. In addition, results from the DNA-based methods are benchmarked against a detailed morphological analysis of all available specimens of the E. perdentatus complex. Our results indicate that species diversity of crested Eusirus is underestimated. Overall, DNA-based methods suggest that the E. perdentatus complex is composed of three putative species and that the E. giganteus complex includes four or five putative species. The morphological analysis of available specimens from the E. perdentatus complex corroborates molecular results by identifying two differentiable species, the genuine E. perdentatus and a new species, herein described as Eusirus pontomedon sp. nov. |
author2 |
Australian Antarctic Division Institut polaire français Paul Émile Victor Fonds Léopold III |
format |
Article in Journal/Newspaper |
author |
Verheye, Marie L D’Udekem D’Acoz, Cédric |
author_facet |
Verheye, Marie L D’Udekem D’Acoz, Cédric |
author_sort |
Verheye, Marie L |
title |
Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) |
title_short |
Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) |
title_full |
Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) |
title_fullStr |
Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) |
title_full_unstemmed |
Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae) |
title_sort |
integrative taxonomy of giant crested eusirus in the southern ocean, including the description of a new species (crustacea: amphipoda: eusiridae) |
publisher |
Oxford University Press (OUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1093/zoolinnean/zlaa141 https://academic.oup.com/zoolinnean/article-pdf/193/1/31/49555553/zlaa141.pdf |
long_lat |
ENVELOPE(62.500,62.500,-67.567,-67.567) |
geographic |
Antarctic Southern Ocean Giganteus |
geographic_facet |
Antarctic Southern Ocean Giganteus |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Zoological Journal of the Linnean Society volume 193, issue 1, page 31-77 ISSN 0024-4082 1096-3642 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1093/zoolinnean/zlaa141 |
container_title |
Zoological Journal of the Linnean Society |
_version_ |
1782327637687926784 |