Historical biogeography and mitogenomics of two endemic Mediterranean gorgonians (Holaxonia, Plexauridae)

Poliseno, Angelo; Altuna, Álvaro; Cerrano, Carlo; Wörheide, Gert; Vargas, Sergio

doi:10.1007/s13127-017-0322-x

Cited by 14 publications

(25 citation statements)

References 52 publications

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“…The Mediterranean Paramuricea species represent two highly divergent lineages resulting from two independent vicariance events related to the Messinian and Gelasian crises, as documented by Poliseno et al (2017). This diversity has been considered to reflect also the ecology of the endemic Paramuricea species, with P. clavata occurring at shallower depths and P. macrospina being restricted to deeper habitats.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, these features have been overlooked, and were not taken into account by all authors. Due to its wide morphological and chromatic plasticity, P. macrospina has often been confused with P. clavata (Koch 1887;Stiasny 1942;Pax & Müller 1962;Carpine & Grasshoff 1975;Aguilar et al 2015) even if these two species are genetically separated (Poliseno et al 2017).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution and phenotypic variability of the Mediterranean gorgonian Paramuricea macrospina (Cnidaria: Octocorallia)

Pica

Calcinai

Poliseno

et al. 2018

The European Zoological Journal

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The genus Paramuricea is present in the Mediterranean Sea with two species, P. clavata and P. macrospina. These species have similar bathymetric distributions and can live in sympatry. P. macrospina shows morphological plasticity leading sometimes to an erroneous classification as P. clavata. Studying four ambiguous morphotypes of P. macrospina collected in different localities of the Mediterranean Sea, we provide new insights on both the taxonomy and the distribution of this species. Our analyses reveal high morphological plasticity within the sampled colonies, which in two cases were characterised by a peculiar pigmentation and a morphological pattern resembling that of P. clavata. After having confirmed the genetic identity of the samples, we tested the validity of traditional taxonomic characters, and found that the most reliable character to discriminate between P. macrospina and P. clavata is the number of rows of spindles in the collaret of the polyps. All other features are highly variable and therefore do not allow a correct identification. The bathymetric and geographic distribution of P. macrospina is here updated, showing, with the exception of the southeastern side, broad preference in the whole basin. Moreover, further studies are needed to investigate the gene flow among and within the Mediterranean populations of P. macrospina and to assess whether the morphological plasticity is driven by adaptive genetic processes of populations exposed to different environmental, climatic and bathymetric conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution and phenotypic variability of the Mediterranean gorgonian Paramuricea macrospina (Cnidaria: Octocorallia)

Pica

Calcinai

Poliseno

et al. 2018

The European Zoological Journal

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“…Five of them are known from the Bay of Biscay, although only three have been found in the southern sector: P. coronata (Carpine and Grasshoff, 1975), P. graciosa (Tixier Durivaut and d'Hondt, 1975) and P. massiliensis (Carpine and Grasshoff, 1975). Most species are rarely collected; they are poorly known animals and the genus needs revision (Poliseno et al, 2017). Little is known about their variability, and illustrations of long series of sclerites have been never published.…”

Section: The Placogorgia Speciesmentioning

confidence: 99%

“…However, it has been suggested that variability within the genus is presumable high, three of the recorded species probably being variants of a single one (Brito and Ocaña, 2004). Unfortunately, the contribution of genetics to differentiate among species has not been effective, not even to discriminate between Placogorgia and Paramuricea with certitude (McFadden et al, 2011;Poliseno et al, 2017), species belonging to both genera occurring in the same clades. For these reasons, a sound species identification is still pending.…”

Section: The Placogorgia Speciesmentioning

confidence: 99%

Analysis of the population structure of a gorgonian forest (Placogorgia sp.) using a photogrammetric 3D modeling approach at Le Danois Bank, Cantabrian Sea

Prado

Sánchez

Rodríguez-Básalo

et al. 2019

Deep Sea Research Part I: Oceanographic Research Papers

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“…Foundational studies 1,2 pointed to a clear division between Anthozoa and Medusozoa, with medusozoans sharing the derived feature of linear mitogenomes. Subsequent studies have confirmed a circular mitochondrial genome in diverse octocorals (reviewed in 3–6 and hexacorals (reviewed by 3,7–14 and a linear mitogenome in additional diverse medusozoans (reviewed by 3,15–17 but see) 18,19 . Some studies have identified other characters that support a fundamental split within Cnidaria between Medusozoa and Anthozoa (e.g.…”

Section: Introductionmentioning

confidence: 95%

Linear Mitochondrial Genome in Anthozoa (Cnidaria): A Case Study in Ceriantharia

Stampar

Broe

Macrander

et al. 2019

Sci Rep

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Sequences and structural attributes of mitochondrial genomes have played a critical role in the clarification of relationships among Cnidaria, a key phylum of early-diverging animals. Among the major lineages of Cnidaria, Ceriantharia (“tube anemones”) remains one of the most enigmatic in terms of its phylogenetic position. We sequenced the mitochondrial genomes of two ceriantharians to see whether the complete organellar genome would provide more support for the phylogenetic placement of Ceriantharia. For both Isarachnanthus nocturnus and Pachycerianthus magnus , the mitochondrial gene sequences could not be assembled into a single circular genome. Instead, our analyses suggest that both species have mitochondrial genomes consisting of multiple linear fragments. Linear mitogenomes are characteristic of members of Medusozoa, one of the major lineages of Cnidaria, but are unreported for Anthozoa, which includes the Ceriantharia. The inferred number of fragments and variation in gene order between species is much greater within Ceriantharia than among the lineages of Medusozoa. We identify origins of replication for each of the five putative chromosomes of the Isarachnanthus nocturnus mitogenome and for each of the eight putative chromosomes of the Pachycerianthus magnus mitogenome. At 80,923 bp, I. nocturnus now holds the record for the largest animal mitochondrial genome reported to date. The novelty of the mitogenomic structure in Ceriantharia highlights the distinctiveness of this lineage but, because it appears to be both unique to and diverse within Ceriantharia, it is uninformative about the phylogenetic position of Ceriantharia relative to other Anthozoa. The presence of tRNA Met and tRNA Trp in both ceriantharian mitogenomes supports a closer relationship between Ceriantharia and Hexacorallia than between Ceriantharia and any other cnidarian lineage, but phylogenetic analysis of the genes contained in the mitogenomes suggests that Ceriantharia is sister to a clade containing Octocorallia + Hexacorallia indicating a possible suppression of tRNA Trp in Octocorallia.

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Historical biogeography and mitogenomics of two endemic Mediterranean gorgonians (Holaxonia, Plexauridae)

Cited by 14 publications

References 52 publications

Distribution and phenotypic variability of the Mediterranean gorgonian Paramuricea macrospina (Cnidaria: Octocorallia)

Distribution and phenotypic variability of the Mediterranean gorgonian Paramuricea macrospina (Cnidaria: Octocorallia)

Analysis of the population structure of a gorgonian forest (Placogorgia sp.) using a photogrammetric 3D modeling approach at Le Danois Bank, Cantabrian Sea

Linear Mitochondrial Genome in Anthozoa (Cnidaria): A Case Study in Ceriantharia

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