Revealing the diversity of the green Eulalia (Annelida, Phyllodocidae) species complex along the European coast, with description of three new species

Teixeira, Marcos A. L.; Vieira, Pedro E.; Fenwick, D. W.; Langeneck, Joachim; Pleijel, Fredrik; Sampieri, Bruno Rodrigues; Hernández, José Carlos; Ravara, Ascensão; Costa, Filipe O.; Nygren, Arne

doi:10.1007/s13127-022-00597-1

Cited by 5 publications

(6 citation statements)

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“…1A ), despite being divergent lineages, with genetic distances that are in the range used for delimitating polychaete species (i.e., Kvist 2016 ; Lobo et al 2016 ; Nygren et al 2018 ). This situation, together with the absence or subtle morphological differences previously overlooked, resembles cryptic lineages within a species complex ( Teixeira et al 2022b , 2023 ), and further sampling efforts between the Red Sea to the Indo-Pacific region are needed to assess this.…”

Section: Discussionmentioning

confidence: 99%

“…Based on genetic databases (i.e., BOLD and GenBank), and despite the recent advances in integrative studies focused on polychaetes (i.e., Nygren et al 2010 ; Villalobos-Guerrero et al 2021 ; Teixeira et al 2023 ), there are still many taxonomic ambiguities and unidentified annelid species in some groups of Nereididae (i.e., Martin et al 2021 ; Elgetany et al 2022 ). Perinereis Kinberg, 1865 is one of the most diverse genera in this family, currently including between 97 ( Wilson et al 2023 ) to 106 ( WoRMS Editorial Board 2024 ) valid species distributed worldwide.…”

Section: Introductionmentioning

confidence: 99%

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Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region

Teixeira,

Fourreau,

Sempere-Valverde

et al. 2024

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Annelid biodiversity studies in the Red Sea are limited and integrative taxonomy is needed to accurately improve reference libraries in the region. As part of the bioblitz effort in Saudi Arabia to assess the invertebrate biodiversity in the northern Red Sea and Gulf of Aqaba, Perinereis specimens from intertidal marine and lagoon-like rocky environments were selected for an independent assessment, given the known taxonomic ambiguities in this genus. This study used an integrative approach, combining molecular with morphological and geographic data. Our results demonstrate that specimens found mainly in the Gulf of Aqaba are not only morphologically different from other five similar Perinereis Group I species reported in the region, but phylogenetic analysis using available COI sequences from GenBank revealed different molecular operational taxonomic units, suggesting an undescribed species, P. kaustianasp. nov. The new species is genetically close and shares a similar paragnath pattern to the Indo-Pacific distributed P. helleri, in particular in Area III and Areas VII–VIII. Therefore, we suggest it may belong to the same species complex. However, P. kaustianasp. nov. differs from the latter mainly in the shorter length of the postero-dorsal tentacular cirri, median parapodia with much longer dorsal Tentacular cirri, posteriormost parapodia with much wider and greatly expanded dorsal ligules. Additionally, two new records are reported for the Saudi Neom area belonging to P. damietta and P. suezensis, previously described only for the Egyptian coast (Suez Canal) and are distributed sympatrically with the new species, but apparently not sympatric with each other.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region

Teixeira,

Fourreau,

Sempere-Valverde

et al. 2024

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“…3). Similarly, when study effort increases, many known species complexes often reveal additional CS, as was the case in polychaetes (Nygren et al, 2018;Teixeira, 2022;Teixeira et al, 2022aTeixeira et al, ,b, 2023. (4) Currently undescribed CS may therefore be concentrated among species which were described before the first half of the nineteenth century and have wide distributions and no hard skeleton, particularly in polar zones.…”

Section: Discussionmentioning

confidence: 99%

“…3). Similarly, when study effort increases, many known species complexes often reveal additional CS, as was the case in polychaetes (Nygren et al ., 2018; Teixeira, 2022; Teixeira et al ., 2022 a , b , 2023). Currently undescribed CS may therefore be concentrated among species which were described before the first half of the nineteenth century and have wide distributions and no hard skeleton, particularly in polar zones. Although this study focuses on marine metazoans, we expect the historical, geographic, and biological factors identified as important could be applied to other taxa and biomes (De Jode et al ., 2019), although further research is necessary. Identifying the many missing CS would aid many areas in biology that rely on accurate species identification, such as assessment of ecosystem vulnerability or censuses of rare species. That CS are not a random sample of extant nominal species has two contrasting consequences: first, undiagnosed CS impact inferences from species data sets (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Scientific history, biogeography, and biological traits predict presence of cryptic or overlooked species

Cahill,

Meglécz,

Chenuil

2023

Biological Reviews

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Genetic data show that many nominal species are composed of more than one biological species, and thus contain cryptic species in the broad sense (including overlooked species). When ignored, cryptic species generate confusion which, beyond biodiversity or vulnerability underestimation, blurs our understanding of ecological and evolutionary processes and may impact the soundness of decisions in conservation or medicine. However, very few hypotheses have been tested about factors that predispose a taxon to contain cryptic or overlooked species. To fill this gap, we surveyed the literature on free‐living marine metazoans and built two data sets, one of 187,603 nominal species and another of 83 classes or phyla, to test several hypotheses, correcting for sequence data availability, taxon size and phylogenetic relatedness. We found a strong effect of scientific history: the probability of a taxon containing cryptic species was highest for the earliest described species and varied among time periods potentially consistently with an influence of prevailing scientific theories. The probability of cryptic species being present was also increased for species with large distribution ranges. They were more frequent in the north polar and south polar zones, contradicting previous predictions of more cryptic species in the tropics, and supporting the hypothesis that many cryptic species diverged recently. The number of cryptic species varied among classes, with an excess in hydrozoans and polychaetes, and a deficit in actinopterygians, for example, but precise class ranking was relatively sensitive to the statistical model used. For all models, biological traits, rather than phylum, appeared responsible for the variation among classes: there were fewer cryptic species than expected in classes with hard skeletons (perhaps because they provide good characters for taxonomy) and image‐forming vision (in which selection against heterospecific mating may enhance morphological divergence), and more in classes with internal fertilisation. We estimate that among marine free‐living metazoans, several thousand additional cryptic species complexes could be identified as more sequence data become available. The factors identified as important for marine animal cryptic species are likely important for other biomes and taxa and should aid many areas in biology that rely on accurate species identification.

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Annotated checklist and community composition of introduced, cryptogenic, and native polychaetes in floating dock communities of New England, USA

Davinack,

Carlton,

Pederson

2024

J. Mar. Biol. Ass.

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This study presents the first comprehensive annotated checklist of polychaetes collected from floating dock communities across New England and adjacent New York areas, emphasizing the significance of rapid biodiversity assessment surveys in understanding marine biodiversity. With 61% of the identified species classified as cryptogenic, the research highlights the complexity of marine biogeography and the challenges of distinguishing between native and non-native species. The incorporation of DNA barcoding has significantly improved species identification and revealed the presence of cryptic species complexes. The study's findings illustrate the prevalence of tubicolous families (Spionidae, Serpulidae, Sabellidae, and Terebelllidae) that are susceptible to anthropogenic dispersal mechanisms. It also addresses the challenge posed by the high proportion of cryptogenic species, calling for enhanced taxonomic and genetic analyses to resolve their origins and ecological roles. Despite the temporal variation in polychaete composition across years, the absence of distinct community assemblages suggests a level of resilience within floating dock communities. Our study advocates for the continuation and expansion of rapid assessment surveys, coupled with the integration of genetic methodologies, to provide a clearer picture of marine biodiversity.

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Revealing the diversity of the green Eulalia (Annelida, Phyllodocidae) species complex along the European coast, with description of three new species

Cited by 5 publications

References 76 publications

Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region

Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region

Scientific history, biogeography, and biological traits predict presence of cryptic or overlooked species

Annotated checklist and community composition of introduced, cryptogenic, and native polychaetes in floating dock communities of New England, USA

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