Is the Mediterranean nudibranch<i>Cratena peregrina</i>(Gmelin, 1791) present on the Brazilian coast? Integrative species delimitation and description of<i>Cratena minor</i>n. sp.

Padula, Vinícius; Araujo, Ana Karla; Matthews-Cascon, Helena; Schrödl, Michael

doi:10.1093/mollus/eyu052

Cited by 32 publications

(26 citation statements)

References 43 publications

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“…Numerous field guides and websites currently offer identifications of nudibranchs based on the external features visible in colour photographs, but due to supposed cryptic diversity, such identifications have become more and more problematic. Hidden genetic diversity has been reported for some nudibranchs at the very beginning of the molecular era (Morrow, Thorpe, & Picton, ) and recently several cryptic/“semi‐cryptic” species have been discovered (Carmona, Bhave, et al., ; Carmona, Lei, et al., ; Churchill, Alejandrino, Valdés, & Foighil, ; Jörger & Schrödl, ; Krug, Ellingson, Burton, & Valdés, ; Padula, Araújo, Matthews‐Cascon, & Schrödl, ; Padula et al., ; Wilson, Schrödl, & Halanych, ). However, taking into account that more than 6,000 opisthobranch species have already been described worldwide in premolecular times (Wägele et al., ), the few cryptic species cases so far reported are just the beginning of an expected explosive increase of the species number in the near future.…”

Section: Introductionmentioning

confidence: 99%

External diversity is restrained by internal conservatism: New nudibranch mollusc contributes to the cryptic species problem

et al. 2017

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Cryptic species are an important concept of modern biodiversity studies and a potential basis for immensely increasing the amount of biological diversity worldwide; however, the conceptual grounds of cryptic species still need to be refined. Here, using a remarkable example from marine invertebrates, the case of a species complex of common large-sized nudibranchs of the genus Dendronotus in European waters is presented, which is relevant for the ongoing cryptic species discussion. Based on extensive sampling in the seas of Northern Hemisphere from United Kingdom to the Sea of Japan, a morphological and molecular framework is constructed for understanding the diversity of European Dendronotus nudibranchs. The present study discovered notable multilevel character diversity within the common Dendronotus "frondosus" species complex. This implies the highest degree of variation of external characters with parallel colour patterns among different species and significantly constrained conservatism of internal characters. The molecular data are congruent with the stable differences in the internal features and confirm the presence of three distinct species in this complex. While two species were already known, the third species is evidently new, based on morphological and molecular evidence and is described here as Dendronotus europaeus sp. n. In the light of multilevel character diversity, the general problem of plausibility of the distinction and practical usage of the terms "cryptic" and "pseudocryptic" species is discussed.

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Section: Introductionmentioning

confidence: 99%

External diversity is restrained by internal conservatism: New nudibranch mollusc contributes to the cryptic species problem

et al. 2017

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“…Developments in molecular biology, population genetics, and phylogeographic methods have boosted research on diversity and evolution in the marine environment. Molecular methods have highlighted the presence of several cryptic species in Heterobranchia (Carmona et al ., ,b; Cooke et al ., ; Espinoza, DuPont & Valdés, ; Padula et al ., ; Pola, Roldán & Padilla, ; Shipman & Gosliner, ; Wilson & Burghardt, ). Therefore, the wide and discontinuous geographic range of A. papillosa , as well as its variability in coloration, suggests that we may be dealing with more than a single species.…”

Section: Introductionmentioning

confidence: 99%

Aeolidia papillosa(Linnaeus, 1761) (Mollusca: Heterobranchia: Nudibranchia), single species or a cryptic species complex? A morphological and molecular study

et al. 2016

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Aeolidia papillosa (Linnaeus, 1761) is a well-known aeolidiid species that has been reported to have a worldwide distribution in cold-temperate waters, mainly from the northern hemisphere. Molecular tools have recently shown that most cosmopolitan species usually belong to a taxonomic species complex. Here we used integrative taxonomy to test the range of distribution of A. papillosa, and to assess the existence of a putative species complex that has been traditionally included as a single species under the name A. papillosa. Maximumlikelihood and Bayesian analyses of partial DNA sequences of the mitochondrial cytochrome c oxidase subunit I and 16S rRNA genes, and the nuclear gene histone 3, were used to infer phylogenetic trees. Automatic Barcode Gap Discovery (ABGD) species delimitation analyses and morphological study complemented the phylogenetic approach. Our results show that A. papillosa is a cosmopolitan and an amphi-Atlantic species, being distributed in the eastern and western Atlantic as well as in the eastern Pacific; however, some specimens from the UK and the Netherlands, together with specimens from Portugal, Galicia, and France, as well as the Californian and Oregon populations, emerge as two pseudocryptic species described herein: Aeolidia filomenae sp. nov. and Aeolidia loui sp. nov., respectively. Finally, the specimens from Chilean coasts, previously attributed to A. papillosa, belong to a different species, Aeolidia campbellii (Cunningham, 1871), that is a senior synonym of Aeolidia serotina Bergh, 1873.

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“…Jörger et al (2012), Jörger and Schrödl (2013), Padula et al (2014). To define species, we use an integrative approach (Dayrat 2005) including tree topologies, pairwise uncorrected distances, and ABGD as well as morphological data.…”

Section: Resultsmentioning

confidence: 99%

Two new species and a remarkable record of the genus Dendronotus from the North Pacific and Arctic oceans (Nudibranchia)

Korshunova¹,

Sanamyan²,

Зимина³

et al. 2016

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Two new species of the nudibranch genus Dendronotus, Dendronotus arcticus sp. n. and Dendronotus robilliardi sp. n., are described from the Arctic and North Pacific oceans respectively, based on morphological and molecular data, and the North Pacific Dendronotus albus is revealed to be a species complex. The species Dendronotus robilliardi sp. n. is described from the northwestern Pacific (Kamchatka) differing from the northeastern Pacific Dendronotus albus by molecular and morphological data. The synonymy of Dendronotus diversicolor with Dendronotus albus is confirmed by analysis of their original descriptions. An endemic Arctic species Dendronotus arcticus sp. n. is also described here, differing substantially from all species of the genus Dendronotus using morphological and molecular data. An unusual record of the recently described Dendronotus kamchaticus Ekimova, Korshunova, Schepetov, Neretina, Sanamyan, Martynov, 2015 is also presented, the first from the northeastern Pacific, geographically separated from the type locality of this species in the northwestern Pacific by a distance ca. 6000 km; molecular data show them to belong to the same species.

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Is the Mediterranean nudibranchCratena peregrina(Gmelin, 1791) present on the Brazilian coast? Integrative species delimitation and description ofCratena minorn. sp.

Cited by 32 publications

References 43 publications

External diversity is restrained by internal conservatism: New nudibranch mollusc contributes to the cryptic species problem

External diversity is restrained by internal conservatism: New nudibranch mollusc contributes to the cryptic species problem

Aeolidia papillosa(Linnaeus, 1761) (Mollusca: Heterobranchia: Nudibranchia), single species or a cryptic species complex? A morphological and molecular study

Two new species and a remarkable record of the genus Dendronotus from the North Pacific and Arctic oceans (Nudibranchia)

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