Conspicuous morphological differentiation without speciation in <i>Anemonia viridis</i> (Cnidaria, Actiniaria)

Mallien, Cédric; Porro, Barbara; Zamoum, Thamilla; Olivier, Caroline; Wiedenmann, Jörg; Furla, Paola; Forcioli, Didier

doi:10.1080/14772000.2017.1383948

Cited by 14 publications

(21 citation statements)

References 70 publications

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“…smaragdina in the ଏrst 2 meters of depth, raising the question of the adaptive nature of the morphs. In our previous work (Mallien et al 2017), using exon-primed introncrossing (EPIC) polymorphism analysis with relatively few EPIC loci (n = 5) for a relatively low number of individuals (n = 34), we did not detect any clear phylogenetic split among the morphs. However, our conclusions may have lacked the resolution needed to detect incompletely separated lineages.…”

Section: Introductionmentioning

confidence: 65%

“…rustica and smaragdina). Previously, using ଏve EPIC markers, we showed that these morphs were not differentiated species (Mallien et al 2017). However, we could have missed a low level of differentiation if the morphs were still in the speciation grey zone (De Queiroz 2007).…”

Section: Absence Of Genetic Differentiation Among the Morphs Of Anemomentioning

confidence: 83%

“…Considering the propensity for clonal reproduction of A. viridis (Wiedenmann et al 1999;Mallien et al 2017), we determined the putative presence of clonal lineages within host samples. Since all the individual RADseq genotypes we obtained were different, the classical way of identifying clonal genets through the detection of repeated multilocus genotypes was not applicable.…”

Section: Clonality Testmentioning

confidence: 99%

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The many faced symbiotic snakelocks anemone (Anemonia viridis, Anthozoa): host and symbiont genetic differentiation among colour morphs

et al. 2019

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How can we explain morphological variations in a holobiont? The genetic determinism of phenotypes is not always obvious and could be circumstantial in complex organisms. In symbiotic cnidarians, it is known that morphology or colour can misrepresent a complex genetic and symbiotic diversity. Anemonia viridis is a symbiotic sea anemone from temperate seas. This species displays different colour morphs based on pigment content and lives in a wide geographical range. Here, we investigated whether colour morph differentiation correlated with host genetic diversity or associated symbiotic genetic diversity by using RAD sequencing and symbiotic dinoଏagellate typing of 140 sea anemones from the English Channel and the Mediterranean Sea. We did not observe genetic differentiation among colour morphs of A. viridis at the animal host or symbiont level, rejecting the hypothesis that A. viridis colour morphs correspond to species level differences. Interestingly, we however identiଏed at least four independent animal host genetic lineages in A. viridis that differed in their associated symbiont populations. In conclusion, although the functional role of the different morphotypes of A. viridis remains to be determined, our approach provides new insights on the existence of cryptic species within A. viridis.

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Section: Introductionmentioning

confidence: 65%

Section: Absence Of Genetic Differentiation Among the Morphs Of Anemomentioning

confidence: 83%

Section: Clonality Testmentioning

confidence: 99%

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The many faced symbiotic snakelocks anemone (Anemonia viridis, Anthozoa): host and symbiont genetic differentiation among colour morphs

et al. 2019

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“…This has typically been seen with allozymes markers (Solé-Cava and Thorpe, 1992;Monteiro et al, 1997;Manchenko et al, 2000;Schama et al, 2005); although analyses using high-throughput sequencing technologies have reached quite similar conclusions (Reitzel et al, 2013;Spano et al, 2018). Phylogenetic approaches using single or concatenated genes are less consistent, detecting both high and low levels of differentiation among closely related lineages (Acuña et al, 2007;Gomes et al, 2012;Pereira et al, 2014;Canales-Aguirre et al, 2015;González-Muñoz et al, 2015;Mallien et al, 2018). In terms of phylogenetic informativeness, the fragments12S rDNA and 18S rDNA have proved to be more proficient to recover well-supported nodes compared to 16S rDNA, 28S rDNA and other barcode markers, such as COI and ITS (Daly et al, 2010;Dohna and Kochzius, 2016).…”

Section: The Multidisciplinary Era Of Species Delimitationmentioning

confidence: 98%

“…It is especially important to know the role played by phenotypic plasticity and local adaptation in the morphological radiation of closely related linages (e.g. Mallien et al, 2018). In fact, compared to bilaterian animals, sea anemone populations exhibit very high differentiation values, even among individuals from close localities (e.g.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Species Delimitation in Sea Anemones (Anthozoa: Actiniaria): From Traditional Taxonomy to Integrative Approaches

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Cb²,

Ss³

et al. 2019

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The present review provides an in-depth look into the complex topic of delimiting species in sea anemones. For most part of history this has been based on a small number of variable anatomic traits, many of which are used indistinctly across multiple taxonomic ranks. Early attempts to classify this group succeeded to comprise much of the diversity known to date, yet numerous taxa were mostly characterized by the lack of features rather than synapomorphies. Of the total number of species names within Actiniaria, about 77% are currently considered valid and more than half of them have several synonyms. Besides the nominal problem caused by large intraspecific variations and ambiguously described characters, genetic studies show that morphological convergences are also widespread among molecular phylogenies. On the contrary, spatial distribution has been emerging as a more reliable parameter to explain cryptic relationships among sea anemones. Integrative approaches and genome-wide data have been especially helpful to unveil the mechanisms behind the speciation process, which is typically marked by large genetic differences among populations, even from neighbouring localities. This paper further discusses current gaps in our knowledge and offers some future directions on how to address the issue of species delimitation in the extremely polymorphic group of sea anemones.

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An integrative study of Anemonia viridis (Forsskål, 1775) and Aiptasia couchii (Cocks, 1851) (Cnidaria: Anthozoa) from the North Adriatic Sea

et al. 2021

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Conspicuous morphological differentiation without speciation in Anemonia viridis (Cnidaria, Actiniaria)

Cited by 14 publications

References 70 publications

The many faced symbiotic snakelocks anemone (Anemonia viridis, Anthozoa): host and symbiont genetic differentiation among colour morphs

The many faced symbiotic snakelocks anemone (Anemonia viridis, Anthozoa): host and symbiont genetic differentiation among colour morphs

Species Delimitation in Sea Anemones (Anthozoa: Actiniaria): From Traditional Taxonomy to Integrative Approaches

An integrative study of Anemonia viridis (Forsskål, 1775) and Aiptasia couchii (Cocks, 1851) (Cnidaria: Anthozoa) from the North Adriatic Sea

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