Species delimitation in Amblyosyllis (Annelida, Syllidae).
Amblyosyllis is a worldwide distributed group of annelids mainly found in coastal environments. It is well known among the polychaete specialists mostly because of its notable beauty, showing bright colourful patterns and outstanding long and coiled appendices. Amblyosyllis is a monophyletic genus e...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2019-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0214211 |
| _version_ | 1818725533857349632 |
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| author | María Teresa Aguado María Capa Domingo Lago-Barcia João Gil Fredrik Pleijel Arne Nygren |
| author_facet | María Teresa Aguado María Capa Domingo Lago-Barcia João Gil Fredrik Pleijel Arne Nygren |
| author_sort | María Teresa Aguado |
| collection | DOAJ |
| description | Amblyosyllis is a worldwide distributed group of annelids mainly found in coastal environments. It is well known among the polychaete specialists mostly because of its notable beauty, showing bright colourful patterns and outstanding long and coiled appendices. Amblyosyllis is a monophyletic genus easy to identify due to its distinct diagnostic features; however, the species and their boundaries are, in most cases, not well defined. Herein, we provide an extensive sample of Amblyosyllis material (115 specimens) from several world geographic areas. We have studied the morphological features of each specimen and photographed them alive. Two mitochondrial DNA markers (COI and 16S) and one nuclear gene fragment (28S, D1 region) were sequenced. We performed phylogenetic analyses based on each DNA partition, as well as the combined data sets, obtaining congruent results. Species delimitation methods such as distance analyses, statistical parsimony networks and multi-rate Poisson tree processes were also applied. The combined results obtained from different methodologies and data sets are used to differentiate between, at least, 19 lineages compatible with the separately evolving meta-populations species concept. Four of these lineages are identified as nominal species, including the type species of Amblyosyllis, A. rhombeata. For three other lineages previously synonymized names are recovered, and seven lineages are described as new species. All of these species are described and supported by appropriate iconography. We recognize several morphological characters useful to identify species of Amblyosyllis, which in some cases should also be combined with molecular methods for species delineation. The genetic divergence in the genus is high, contrary to the morphological homogeneity observed. Two species show a wide geographical distribution, while the rest have a more restricted distribution. There are several examples of species with overlapping distribution patterns. |
| first_indexed | 2024-12-17T21:43:50Z |
| format | Article |
| id | doaj.art-6f0229b2334b465085c90318ab72918a |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-17T21:43:50Z |
| publishDate | 2019-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-6f0229b2334b465085c90318ab72918a2022-12-21T21:31:32ZengPublic Library of Science (PLoS)PLoS ONE1932-62032019-01-01144e021421110.1371/journal.pone.0214211Species delimitation in Amblyosyllis (Annelida, Syllidae).María Teresa AguadoMaría CapaDomingo Lago-BarciaJoão GilFredrik PleijelArne NygrenAmblyosyllis is a worldwide distributed group of annelids mainly found in coastal environments. It is well known among the polychaete specialists mostly because of its notable beauty, showing bright colourful patterns and outstanding long and coiled appendices. Amblyosyllis is a monophyletic genus easy to identify due to its distinct diagnostic features; however, the species and their boundaries are, in most cases, not well defined. Herein, we provide an extensive sample of Amblyosyllis material (115 specimens) from several world geographic areas. We have studied the morphological features of each specimen and photographed them alive. Two mitochondrial DNA markers (COI and 16S) and one nuclear gene fragment (28S, D1 region) were sequenced. We performed phylogenetic analyses based on each DNA partition, as well as the combined data sets, obtaining congruent results. Species delimitation methods such as distance analyses, statistical parsimony networks and multi-rate Poisson tree processes were also applied. The combined results obtained from different methodologies and data sets are used to differentiate between, at least, 19 lineages compatible with the separately evolving meta-populations species concept. Four of these lineages are identified as nominal species, including the type species of Amblyosyllis, A. rhombeata. For three other lineages previously synonymized names are recovered, and seven lineages are described as new species. All of these species are described and supported by appropriate iconography. We recognize several morphological characters useful to identify species of Amblyosyllis, which in some cases should also be combined with molecular methods for species delineation. The genetic divergence in the genus is high, contrary to the morphological homogeneity observed. Two species show a wide geographical distribution, while the rest have a more restricted distribution. There are several examples of species with overlapping distribution patterns.https://doi.org/10.1371/journal.pone.0214211 |
| spellingShingle | María Teresa Aguado María Capa Domingo Lago-Barcia João Gil Fredrik Pleijel Arne Nygren Species delimitation in Amblyosyllis (Annelida, Syllidae). PLoS ONE |
| title | Species delimitation in Amblyosyllis (Annelida, Syllidae). |
| title_full | Species delimitation in Amblyosyllis (Annelida, Syllidae). |
| title_fullStr | Species delimitation in Amblyosyllis (Annelida, Syllidae). |
| title_full_unstemmed | Species delimitation in Amblyosyllis (Annelida, Syllidae). |
| title_short | Species delimitation in Amblyosyllis (Annelida, Syllidae). |
| title_sort | species delimitation in amblyosyllis annelida syllidae |
| url | https://doi.org/10.1371/journal.pone.0214211 |
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