Molecular data reveal a highly diverse species flock within the munnopsoid deep-sea isopod Betamorpha fusiformis (Barnard, 1920) (Crustacea: Isopoda: Asellota) in the Southern Ocean

Raupach, Michael J.; Malyutina, Marina V.; Brandt, Angelika; Wägele, Johann‐Wolfgang

doi:10.1016/j.dsr2.2007.07.009

Cited by 111 publications

(82 citation statements)

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“…A first step may include the analysis of the complete 28S rDNA. While classic mitochondrial gene fragments (CO1, 12S and 16S rDNA) are useful for phylogenetic/phylogeographic studies of closely related species or genera (Wetzer 2001(Wetzer , 2002Raupach & Wägele 2006;Raupach et al 2007), recent analyses of complete mitochondrial sequence data and gene arrangement information of isopods (Kilpert & Podsiadlowski 2006;Podsiadlowski & Bartolomaeus 2006) are highly promising and may be useful for a more detailed reconstruction of basal asellote phylogenetic relationships. We conclude that future studies should consider samples from rare taxa currently missing, such as specimens of the families Echinothambematidae, Katianiridae or Mictosomatidae, in order to confirm the colonization of the deep sea by the Asellota in more detail.…”

Section: Discussionmentioning

confidence: 99%

“…These isopods are mostly very small benthic or epibenthic blind animals with a body size of a few millimetres, which are difficult to identify at the species level. As with all Peracarida, they have no planktonic larvae, which probably limits gene flow and increases the probability of speciation events (Raupach & Wägele 2006;Raupach et al 2007;Brö keland & Raupach 2008). Deepsea Asellota show an amazing variety of bizarre and extravagant body forms, including elongated stick-like animals (Ischnomesidae), burrowing dozer-like forms (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…To date, the majority of molecular phylogenetic works on deep-sea organisms focus on phylogeographic patterns or population genetics of single species (e.g. Creasey & Rogers 1999;Etter et al 2005;Zardus et al 2006;Raupach et al 2007), and only a few studies analyse deep-sea colonization patterns and events of more than one species (Shank et al 1999;Le Goff-Vitry et al 2004;Raupach et al 2004;Knudsen et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Multiple origins of deep-sea Asellota (Crustacea: Isopoda) from shallow waters revealed by molecular data

et al. 2008

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The Asellota are a highly variable group of Isopoda with many species in freshwater and marine shallowwater environments. However, in the deep sea, they show their most impressive radiation with a broad range of astonishing morphological adaptations and bizarre body forms. Nevertheless, the evolution and phylogeny of the deep-sea Asellota are poorly known because of difficulties in scoring morphological characters. In this study, the molecular phylogeny of the Asellota is evaluated for 15 marine shallowwater species and 101 deep-sea species, using complete 18S and partial 28S rDNA gene sequences. Our molecular data support the monophyly of most deep-sea families and give evidence for a multiple colonization of the deep sea by at least four major lineages of asellote isopods. According to our molecular data, one of these lineages indicates an impressive radiation in the deep sea. Furthermore, the present study rejects the monophyly of the family Janiridae, a group of plesiomorphic shallow-water Asellota, and several shallow-water and deep-sea genera (Acanthaspidia, Ianthopsis, Haploniscus, Echinozone, Eurycope, Munnopsurus and Syneurycope).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multiple origins of deep-sea Asellota (Crustacea: Isopoda) from shallow waters revealed by molecular data

et al. 2008

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“…Complexes of sibling species and cr yptic species have been widely identified using DNA markers (e.g., Gouws et al 2004, Moura et al 2008, Jordaens et al 2010, Azuma et al 2011, and most cr yptic species are marine invertebrates (Knowlton 1993). Cryptic species have been repor ted along the geographic range that was assumed for one benthic marine species with low dispersal potential (Held & Wägele 2005, Raupach & Wägele 2006, Remerie et al 2006, Linse et al 2007, Raupach et al 2007, Boissin et al 2008, Baird et al 2011, Carr et al 2011, Doellman et al 2011. Under a low dispersal scenario, isolation by distance and outbreeding depression are enough to account for a high speciation rate (Hoelzer et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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

Varela¹,

Haye

2012

Rev. chil. hist. nat.

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The marine brooder Excirolana braziliensis (Crustacea: Isopoda) is also a complex of cryptic species on the coast of Chile ABSTRACTSpeciation is a direct consequence of isolated populations in taxa with low dispersal potential. The brooding crustacean Excirolana braziliensis, with a presumably wide geographic range of distribution (~16º N-41º S in the Pacifi c and ~19º N-35º S in the Atlantic), has been detected to correspond to cryptic species on the coast of Panama. Latitudinal variations in reproductive features in E. braziliensis have been attributed to phenotypic plasticity, however, the differences may be the result of divergent populations. Considering that the taxon has been reported to be a complex of cryptic species in other geographic areas and given the phenotypic differences detected along its distribution range, we hypothesized that E. braziliensis is a complex of species in the coast of Chile. We used partial cytochrome c oxidase subunit I (COI) sequences from 132 individuals with the diagnostic morphology of E. braziliensis collected along ~2200 km of coast to determine the genetic structure of E. braziliensis. Phylogenetic and phylogeographic analyses showed three distinct clades with 14 to 19 % of genetic divergence and high values of genetic differentiation. Intra and inter-clade divergence revealed the existence of a species complex of E. braziliensis on the coast of Chile, supporting growing evidence of the high abundance of cryptic species in marine invertebrate taxa.Key words: cryptic species, genetic differentiation, genetic distance, marine peracarids, phylogenetics. RESUMENLa especiación es una consecuencia directa de poblaciones aisladas en taxa con bajo potencial de dispersión. El crustáceo incubador Excirolana braziliensis tiene un rango de distribución presumiblemente amplio (~16º N-41º S en el Pacífi co y ~19º N-35º S en el Atlántico). Se ha detectado que este taxón representa un complejo de especies crípticas en la costa de Panamá. Variaciones latitudinales en características reproductivas en E. braziliensis han sido atribuidas a plasticidad fenotípica, sin embargo, las diferencias podrían deberse a la existencia de poblaciones divergentes. Considerando que se ha reportado que este taxón es un complejo de especies crípticas en otras áreas geográfi cas y dadas las diferencias fenotípicas detectadas a lo largo de su rango de distribución, hipotetizamos que E. braziliensis es un complejo de especies en la costa de Chile. Utilizamos secuencias parciales del gen citocromo c oxidasa subunidad I (COI) de 132 individuos con la morfología diagnóstica de E. braziliensis recolectados a lo largo de ~2200 km de costa para determinar la estructura genética de E. braziliensis. Análisis fi logenéticos y fi logeográfi cos revelaron tres clados que presentaron una divergencia genética entre 14-19 % y valores de diferenciación altos. La divergencia intra e interclados indican que existe un complejo de especies de E. braziliensis en la costa de Chile, lo que se suma a la creciente evidencia de la al...

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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).…”

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A new evolutionary unit in the Excirolana braziliensis species complex

et al. 2016

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Molecular data reveal a highly diverse species flock within the munnopsoid deep-sea isopod Betamorpha fusiformis (Barnard, 1920) (Crustacea: Isopoda: Asellota) in the Southern Ocean

Cited by 111 publications

References 54 publications

Multiple origins of deep-sea Asellota (Crustacea: Isopoda) from shallow waters revealed by molecular data

Multiple origins of deep-sea Asellota (Crustacea: Isopoda) from shallow waters revealed by molecular data

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

A new evolutionary unit in the Excirolana braziliensis species complex

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