Mitogenomics does not resolve deep molluscan relationships (yet?)

Stöger, Isabella; Schrödl, Michael

doi:10.1016/j.ympev.2012.11.017

Cited by 100 publications

(90 citation statements)

References 86 publications

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“…4)38, with Heterodonta and Pteriomorphia in a sister group relationship3855. Nonetheless, in a recent and more robust molecular study, Palaeoheterodonta was recovered as sister taxa to Heterodonta, both forming a clade sister to Pteriomorphia56.…”

Section: Resultsmentioning

confidence: 99%

Mitogenomics of southern hemisphere blue mussels (Bivalvia: Pteriomorphia): Insights into the evolutionary characteristics of the Mytilus edulis complex

Gaitán‐Espitía

Nespolo

Mesas

et al. 2016

Sci Rep

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Marine blue mussels (Mytilus spp.) are widespread species that exhibit an antitropical distribution with five species occurring in the Northern Hemisphere (M. trossulus, M. edulis, M. galloprovincialis, M. californianus and M. coruscus) and three in the Southern Hemisphere (M. galloprovincialis, M. chilensis and M. platensis). Species limits in this group remain controversial, in particular for those forms that live in South America. Here we investigated structural characteristics of marine mussels mitogenomes, based on published F mtDNA sequences of Northern Hemisphere species and two newly sequenced South American genomes, one from the Atlantic M. platensis and another from the Pacific M. chilensis. These mitogenomes exhibited similar architecture to those of other genomes of Mytilus, including the presence of the Atp8 gene, which is missing in most of the other bivalves. Our evolutionary analysis of mitochondrial genes indicates that purifying selection is the predominant force shaping the evolution of the coding genes. Results of our phylogenetic analyses supported the monophyly of Pteriomorphia and fully resolved the phylogenetic relationships among its five orders. Finally, the low genetic divergence of specimens assigned to M. chilensis and M. platensis suggests that these South American marine mussels represent conspecific variants rather than distinct species.

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Section: Resultsmentioning

confidence: 99%

Mitogenomics of southern hemisphere blue mussels (Bivalvia: Pteriomorphia): Insights into the evolutionary characteristics of the Mytilus edulis complex

Gaitán‐Espitía

Nespolo

Mesas

et al. 2016

Sci Rep

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“…4b) systematic and evolutionary conclusions was presented by Schrödl et al (2011b). Recent analyses of metazoan and all molluscan mitogenomes available in July 2011 show that Heterobranchia are on a very long branch that may suffer from artificial attraction of distant taxa (Stöger and Schrödl 2012). Since long-branched stylommatophoran pulmonates are recovered as the most basal heterobranchs, the authors assume that inner-heterobranch topology is not appropriately rooted.…”

Section: Molecular Approachesmentioning

confidence: 99%

Flashback and foreshadowing—a review of the taxon Opisthobranchia

et al. 2013

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Opisthobranchia have experienced an unsettled taxonomic history. At the moment their taxonomy is in state of dramatic flux as recent phylogenetic studies have revealed traditional Opisthobranchia to be paraphyletic or even polyphyletic, allocating some traditional opisthobranch taxa to other groups of Heterobranchia, e.g. Pulmonata. Here we review the history of Opisthobranchia and their subgroups, explain their traditionally proposed relationships, and outline the most recent phylogenetic analyses based on various methods (morphology, single gene and multiple gene analyses, as well as genomic data). We also present a phylogenetic hypothesis on Heterobranchia that, according to the latest results, represents a consensus and is the most probable one available to date. The proposed phylogeny supports the Acteonoidea outside of monophyletic Euthyneura, the basal euthyneuran split into Nudipleura (Nudibranchia plus Pleurobranchoidea) and the recently established taxon Tectipleura. The latter divides into the Euopisthobranchia, containing most of the major traditional opisthobranch clades, and the Panpulmonata, with a mix of the former opisthobranch, putative allogastropod and pulmonate taxa. This "new euthyneuran tree" rejects the traditional taxa Opisthobranchia and Pulmonata, and, in particular, has profound implications for preconceived textbook scenarios of opisthobranch and pulmonate evolution, which must now be reconsidered. In the absence of systematic barriers, research communities-which have traditionally investigated marine and non-marine heterobranchs separately-need to interact and finally merge for the sake of science.

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“…It has been suggested that this result could be due to a long-branch attraction (LBA) phenomenon (Grande et al, 2008;Stöger and Schrödl, 2013). However, Lottia has a long branch, regardless of the marker, and the effect of the LBA would be to push the branch of Patellogastropoda next to the root not to Heterobranchia.…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

The mitochondrial genome of Ifremeria nautilei and the phylogenetic position of the enigmatic deep-sea Abyssochrysoidea (Mollusca: Gastropoda)

Osca

Templado

Zardoya

2014

Gene

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The complete nucleotide sequence of the mitochondrial (mt) genome of the deep-sea vent snail Ifremeria nautilei (Gastropoda: Abyssochrysoidea) was determined. The double stranded circular molecule is 15,664 pb in length and encodes for the typical 37 metazoan mitochondrial genes. The gene arrangement of the Ifremeria mt genome is most similar to genome organization of caenogastropods and differs only on the relative position of the trnW gene.The deduced amino acid sequences of the mt protein coding genes of Ifremeria mt genome were aligned with orthologous sequences from representatives of the main lineages of gastropods and phylogenetic relationships were inferred. The reconstructed phylogeny supports that Ifremeria belongs toCaenogastropoda and that is closely related to hypsogastropod superfamilies.Results were compared with a reconstructed nuclear-based phylogeny.Moreover, a relaxed molecular-clock timetree calibrated with fossils dated the divergence of Abyssochrysoidea in the Late Jurassic-Early Cretaceous indicating a relatively modern colonization of deep-sea environments by these snails.

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Mitogenomics does not resolve deep molluscan relationships (yet?)

Cited by 100 publications

References 86 publications

Mitogenomics of southern hemisphere blue mussels (Bivalvia: Pteriomorphia): Insights into the evolutionary characteristics of the Mytilus edulis complex

Mitogenomics of southern hemisphere blue mussels (Bivalvia: Pteriomorphia): Insights into the evolutionary characteristics of the Mytilus edulis complex

Flashback and foreshadowing—a review of the taxon Opisthobranchia

The mitochondrial genome of Ifremeria nautilei and the phylogenetic position of the enigmatic deep-sea Abyssochrysoidea (Mollusca: Gastropoda)

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