Species delimitation in Amblyosyllis (Annelida, Syllidae)

Autor: João Gil, María Capa, Fredrik Pleijel, Maria Teresa Aguado, Domingo Lago-Barcia, Arne Nygren
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
PLoS ONE, Vol 14, Iss 4, p e0214211 (2019)
Digital.CSIC. Repositorio Institucional del CSIC
instname
e0214211-?
PLOS ONE
ISSN: 2015-6359
Popis: Este artículo contiene 71 páginas, 33 figuras, 2 tablas.
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.
This study is a contribution of the project “Macroevolutionary transitions in Syllidae” CGL2015-63593-P supported by MINECO (http:// www.mineco.gob.es)/FEDER, UE funds, PI: MTA. Funding was also provided by the ForBio Research School (supported by the Research Council of Norway (https://forskningsradet.no, project no. 248799) and the Norwegian Taxonomy Initiative (https://artsdatabanken.no, project no. 70184215); and the Ramon y Cajal program (RYC-2016- 20799) funded by Spanish MINECO, Agencia Estatal de Investigacio´n, Comunidad Auto´noma de las Islas Baleares and the European Social Fund to MC. Financial support was provided to AN by the Norwegian Taxonomy Initiative (Cryptic polychaete species in Norwegian waters, (project no. 70184228, and by Kungliga Fysiografiska sa¨llskapet Nilsson-Ehle donationerna (https:// fysiografen.se). NTNU publication fund (http://ntnu. edu) to MC covered the publication costs.
Databáze: OpenAIRE
Externí odkaz: