The marine brooder Excirolana braziliensis (Crustacea: Isopoda) is also a complex of cryptic species on the coast of Chile

Varela, Andrea I.; Haye, Pilar A.

doi:10.4067/s0716-078x2012000400011

Cited by 31 publications

(29 citation statements)

References 9 publications

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“…On the other hand, the highest average distance observed between the nine MOTUs within D. edwardsi complex (21.92%) surpasses the average distance between D. bidentata and D. magnitorata (16.55%). The range of COI genetic distances observed within the D. edwardsi complex is similar to values reported for a number of complexes of cryptic species of isopods, such as the Ligia occidentalis complex comprising 15 putative cryptic species with a divergence range of 13%–27% (Markow & Pfeiler, ); Excirolana braziliensis with three putative species, ranging from 14% to 19% (Varela & Haye, ); Chelator insignis , five lineages with > 20% divergence (Brix et al, ); and Sphaeroma terebrans with four distinct clades diverging from 15% to 18% (Baratti, Filippelli, & Messana, ; Baratti, Goti, & Messana, ).…”

Section: Discussionsupporting

confidence: 83%

“…In order to resolve taxonomic ambiguity, molecular taxonomy has been successfully applied to isopods. Examples include the validation of new species (Khalaji‐Pirbalouty & Raupach, ; Xavier et al, ), discrimination of morphologically similar species (Radulovici, Sainte‐Marie, & Dufresne, ; Xavier et al, ) or unravelling multiple cryptic species complexes (Brix, Svavarsson, & Leese, ; Markow & Pfeiler, ; Raupach et al, ; Raupach & Wägele, ; Varela & Haye, ).…”

Section: Introductionmentioning

confidence: 99%

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Deep segregation in the open ocean: Macaronesia as an evolutionary hotspot for low dispersal marine invertebrates

Vieira

Desiderato

Holdich³

et al. 2019

Molecular Ecology

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Diversification and speciation of terrestrial organisms are anticipated in oceanic islands such as Macaronesia, a group of Atlantic islands that have remained unconnected to continental landmasses. Hitherto, the diversification of marine organisms in oceanic islands, especially those with low vagility, has received little direct empirical analysis using molecular markers. Here, we focus on such a case study, through applying a multilocus molecular approach to investigate the diversity and evolution of a group that lacks a planktonic larval stage, the isopod genus Dynamene, in Macaronesia and Northeast Atlantic. Sequences of two mitochondrial (cytochrome c oxidase subunit I and 16S rRNA) and two nuclear (18S rRNA and 28S rRNA) loci were obtained from specimens of Dynamene edwardsi (Lucas, 1849), Dynamene magnitorata Holdich, 1968 and Dynamene bidentata (Adams, 1800) collected along the Northeast Atlantic and Macaronesia. Although no major phylogeographic structure was detected in D. bidentata and D. magnitorata, from five to nine deeply divergent lineages were evident within D. edwardsi. The divergent lineages displayed genetic distances comparable to those found among established species of peracarids. D. edwardsi exhibits a long, rich and complex phylogeographic history in Macaronesia, where the geodynamics of the islands possibly associated with founder effects and subsequent lack of gene flow among populations confounds patterns based on geographic proximity of targeted populations. Our findings collectively suggest a much larger role of oceanic islands in the diversification of marine invertebrates than previously anticipated. The work provides insights into the origins and dynamics of ongoing geographic segregation and associated deep divergence among sister evolutionary lineages in Macaronesia.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Deep segregation in the open ocean: Macaronesia as an evolutionary hotspot for low dispersal marine invertebrates

Vieira

Desiderato

Holdich³

et al. 2019

Molecular Ecology

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“…Concordantly, recent phylogeographic studies of intertidal isopods indicate that several species presumed to occupy broad distributions, instead correspond to diverse species complexes comprised of multiple highly divergent cryptic lineages, which often have very restricted geographic ranges (Sponer and Lessios ; Hurtado et al. , , ; Varela and Haye ; Santamaria et al. , , ).…”

Section: Introductionmentioning

confidence: 92%

Multiple transisthmian divergences, extensive cryptic diversity, occasional long‐distance dispersal, and biogeographic patterns in a marine coastal isopod with an amphi‐American distribution

Hurtado

Mateos

Mattos

et al. 2016

Ecology and Evolution

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Excirolana braziliensis is a coastal intertidal isopod with a broad distribution spanning the Atlantic and Pacific tropical and temperate coasts of the American continent. Two separate regional studies (one in Panama and one in Chile) revealed the presence of highly genetically divergent lineages, implying that this taxon constitutes a cryptic species complex. The relationships among the lineages found in these two different regions and in the rest of the distribution, however, remain unknown. To better understand the phylogeographic patterns of E. braziliensis, we conducted phylogenetic analyses of specimens from much of its entire range. We obtained DNA sequences for fragments of four mitochondrial genes (16S rDNA, 12S rDNA, COI, and Cytb) and also used publicly available sequences. We conducted maximum likelihood and Bayesian phylogenetic reconstruction methods. Phylogeographic patterns revealed the following: (1) new highly divergent lineages of E. braziliensis; (2) three instances of Atlantic–Pacific divergences, some of which appear to predate the closure of the Isthmus of Panama; (3) the distributional limit of highly divergent lineages found in Brazil coincides with the boundary between two major marine coastal provinces; (4) evidence of recent long‐distance dispersal in the Caribbean; and (5) populations in the Gulf of California have closer affinities with lineages further south in the Pacific, which contrasts with the closer affinity with the Caribbean reported for other intertidal organisms. The high levels of cryptic diversity detected also bring about challenges for the conservation of this isopod and its fragile environment, the sandy shores. Our findings underscore the importance of comprehensive geographic sampling for phylogeographic and taxonomical studies of broadly distributed putative species harboring extensive cryptic diversity.

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“…Several cases of cryptic species have been reported for marine species with relatively wide geographical range and low dispersal potential (BAIRD et al, 2011;BOISSIN et al, 2008;CARR et al, 2011;HELD;WÄGELE, 2005;LARSEN et al, 2014;MARKOW;PFEILER, 2010;RAUPACH et al, 2007;REMERIE et al, 2006;SPONER;LESSIOS, 2009;VARELA;HAYE, 2012;XAVIER et al, 2016). In a low dispersal scenario, as in many marine brooders, isolation by distance and outbreeding depression are enough to account for a high speciation rate (HOELZER et al, 2008).…”

mentioning

confidence: 99%

“…Only the telson muscle of each individual was used, unless individuals were smaller than 5 mm, in which case the whole body was used. The COI marker was selected since it was the gene used by VARELA and HAYE (2012) and SPONER and LESSIOS (2009) in their studies of E. braziliensis genetic diversity, and it has been successfully used for the detection of cryptic species in marine invertebrates (COSTA et al, 2007).…”

mentioning

confidence: 99%

A new evolutionary unit in the Excirolana braziliensis species complex

et al. 2016

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The marine brooder Excirolana braziliensis (Crustacea: Isopoda) is also a complex of cryptic species on the coast of Chile

Cited by 31 publications

References 9 publications

Deep segregation in the open ocean: Macaronesia as an evolutionary hotspot for low dispersal marine invertebrates

Deep segregation in the open ocean: Macaronesia as an evolutionary hotspot for low dispersal marine invertebrates

Multiple transisthmian divergences, extensive cryptic diversity, occasional long‐distance dispersal, and biogeographic patterns in a marine coastal isopod with an amphi‐American distribution

A new evolutionary unit in the Excirolana braziliensis species complex

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