Two cryptic species of the Hediste diversicolor group (Polychaeta, Nereididae) in the Baltic Sea, with mitochondrial signatures of different population histories

Audzijonytė, Asta; Ovcarenko, Irina; Bastrop, Ralf; Väinölä, Risto

doi:10.1007/s00227-008-1055-3

Cited by 32 publications

(52 citation statements)

References 41 publications

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“…At least two of these lineages are likely to be cryptic species, consistent with the results of studies that used nuclear molecular markers (Audzijonyte et al . ). Moreover, the mean sequence divergence between the haplogroups of O. labronica was 18 and 43 times higher than within‐haplogroup variation for HG‐A and HG‐B (K2P distance = 0.94% and 0.41%), respectively.…”

Section: Discussionmentioning

confidence: 97%

Phylogeography of Ophryotrocha labronica (Polychaeta, Dorvilleidae) along the Italian coasts

et al. 2014

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Species of the genus Ophryotrocha are a well‐studied group of organisms but, despite the relatively large body of biological studies, little is known about their intra‐specific patterns of genetic diversity. In the present study, we analysed the patterns of genetic variation in samples of Ophryotrocha labronica (Polychaeta, Dorvilleidae) collected along the Italian coasts within three regions with different thermal regimes: the Northern Adriatic Sea (NAS), the Ligurian Sea (LS), and the South/Southeast Sicilian Sea (SS). A partial sequence of the cytochrome c oxidase subunit I (COI) gene was used as a genetic marker. An analysis of molecular variance (AMOVA) showed significant genetic differentiation between the NAS and the other regions. Conversely, little or no genetic structuring was found between the LS and the SS or amongst locations within a given region. A Bayesian phylogenetic tree and a median‐joining network provided evidence for the occurrence of two highly divergent genetic lineages characterized by a high average sequence divergence (17.2%, Kimura two‐parameter distance). The spatial patterns of genetic variation found in O. labronica may reflect the signature of past expansion events of the two genetic lineages. Although the high sequence divergence suggested that cryptic speciation within O. labronica may have occurred, other traits such as the absence of reproductive isolation, pattern of phenotypic variation and habitat specificity prompted us to regard the two groups as distinct COI lineages of O. labronica.

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Section: Discussionmentioning

confidence: 97%

Phylogeography of Ophryotrocha labronica (Polychaeta, Dorvilleidae) along the Italian coasts

et al. 2014

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“…As a consequence, a steadily increasing number of species are delimited genetically but lack a formal, morphology-based description (e.g. Audzijonyte et al 2008, Barroso et al 2009, Osborn and Rouse 2010). This problem is amplified by the so-called “taxonomic impediment”: fewer and fewer resources—both human and financial—are available for conventional taxonomic and systematic research (Carvalho et al 2007), and the field is lacking a global electronic infrastructure (Godfray 2002a, Wheeler et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Micro-computed tomography: Introducing new dimensions to taxonomy

Faulwetter¹,

Vasileiadou²,

Kouratoras³

et al. 2013

183

217

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Continuous improvements in the resolution of three-dimensional imaging have led to an increased application of these techniques in conventional taxonomic research in recent years. Coupled with an ever increasing research effort in cybertaxonomy, three-dimensional imaging could give a boost to the development of virtual specimen collections, allowing rapid and simultaneous access to accurate virtual representations of type material. This paper explores the potential of micro-computed tomography (X-ray micro-tomography), a non-destructive three-dimensional imaging technique based on mapping X-ray attenuation in the scanned object, for supporting research in systematics and taxonomy. The subsequent use of these data as virtual type material, so-called “cybertypes”, and the creation of virtual collections lie at the core of this potential. Sample preparation, image acquisition, data processing and presentation of results are demonstrated using polychaetes (bristle worms), a representative taxon of macro-invertebrates, as a study object. Effects of the technique on the morphological, anatomical and molecular identity of the specimens are investigated. The paper evaluates the results and discusses the potential and the limitations of the technique for creating cybertypes. It also discusses the challenges that the community might face to establish virtual collections. Potential future applications of three-dimensional information in taxonomic research are outlined, including an outlook to new ways of producing, disseminating and publishing taxonomic information.

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“…Further, at least von Marenzeller (1874) and Bobretzky (1881) regarded N. falsa as a junior synonym of H. diversicolor which would somehow support the second alternative. However, two different species currently regarded as H. diversicolor were recognized in the Baltic Sea (Audzijonyte, Ovcarenko, Bastrop, & Väinölä, 2008), and three different clades that can be regarded as different species were found in European seas, with a distinct form present in the Black Sea (Virgilio, Fauvelot Constantini, Abbiati, & Backeljau, 2009).…”

Section: Means For Solution?mentioning

confidence: 99%

How false is Nereis falsa (Annelida, Phyllodocida, Nereididae)?

Salazar‐Vallejo

Gillet²,

Surugiu

2017

RBT

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Abstract:There are many taxonomic problems in polychaete species names and solving confusing or inadequate taxonomic procedures is both time-demanding and extremely important. Our objective in this contribution was to analyse what is the current taxonomic situation for Nereis falsa de Quatrefages, 1866; it was based upon Nereis pulsatoria? Rathke, 1837 from the Black Sea, and it is currently regarded as having a very wide distribution. The species has been collected from different benthic substrates and even can be found on floating objects or marine turtles. Nereis falsa has been recorded from the Mediterranean Sea, the Eastern Atlantic along Africa, the Western Atlantic (Gulf of Mexico, Caribbean Sea, Brazil), and the Indian Ocean. However, despite the fact N. falsa was proposed as a species from the Black Sea, it has not yet been found there. How can we explain that a species is able to attain a very wide distribution and yet be missing from its type locality? After a careful study of previous publications and with our understanding of the systematics of nereidid polychaetes, we clarify the current situation by examining several related species and pointed out some nomenclatural issues. Our analysis indicates there is more than one species included under the same name, and in this contribution we propose some means to promote discussion and actions, and suggest some basic research for solving this issue. Rev. Biol. Trop. 65 (3): 847-857. Epub 2017 September 01.

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Two cryptic species of the Hediste diversicolor group (Polychaeta, Nereididae) in the Baltic Sea, with mitochondrial signatures of different population histories

Cited by 32 publications

References 41 publications

Phylogeography of Ophryotrocha labronica (Polychaeta, Dorvilleidae) along the Italian coasts

Phylogeography of Ophryotrocha labronica (Polychaeta, Dorvilleidae) along the Italian coasts

Micro-computed tomography: Introducing new dimensions to taxonomy

How false is Nereis falsa (Annelida, Phyllodocida, Nereididae)?

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