Cryptic speciation in the cosmopolitan Epiphanes senta complex (Monogononta, Rotifera) with the description of new species

Schröder, Thomas; Walsh, Elizabeth J.

doi:10.1007/s10750-007-9066-5

Cited by 59 publications

(55 citation statements)

References 33 publications

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“…In monogonont rotifers, cryptic species complexes have been described for species such as Brachionus plicatilis (Gómez & Serra, 1995;Gómez & Snell, 1996;Gómez et al, 2002), B. calyciflorus (Schröder & Walsh, 2007;Xi et al, 2011), Epiphanes senta (Gilbert & Walsh, 2005), Lecane spp. (García-Morales & Elías-Gutiér-rez, 2013), Polyarthra dolichoptera (Obertegger et al, 2014), Synchaeta spp.…”

Section: Introductionmentioning

confidence: 99%

High diversity in Keratella cochlearis (Rotifera, Monogononta): morphological and genetic evidence

2016

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Rotifers are ubiquitous freshwater animals for which many complexes of cryptic species (i.e. distinct species that are morphologically difficult to distinguish) are described. Keratella cochlearis occurs globally and shows a wide phenotypic diversity indicating the potential presence of a species complex. We sampled lakes of the Trentino-South Tyrol region (Italy) and investigated mitochondrial genetic diversity in K. cochlearis in relation to detailed lorica measurements. We sequenced the mitochondrial cytochrome c oxidase subunit I and used the generalised mixed Yule coalescent approach, Poisson tree process model and automatic barcode gap discovery to delimit mitochondrial groups, associated with putative evolutionary significant units (ESUs). Based on 248 sequences, eight putative ESUs were indicated that could only partially be delimited by lorica morphology. Specifically, several morphological characteristics (i.e. spinelets, bended median ridge, and posterior spine) were found in specimens of different putative ESUs, and thus, these characters seem to be of poor discriminatory value. Furthermore, different putative ESUs of K. cochlearis were found in the same lake. We conclude that the high mitochondrial genetic diversity may be linked to tolerance of K. cochlearis to varying environmental conditions.

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Section: Introductionmentioning

confidence: 99%

High diversity in Keratella cochlearis (Rotifera, Monogononta): morphological and genetic evidence

2016

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“…In the last two decades, many potential cryptic rotifer species which were genetically divergent but morphologically similar have been discriminated and subdivided such as the monogont rotifers through the application of molecular phylogenetics and mating tests (Ciros-P erez et al 2001;G omez et al, 2002b;Derry et al 2003;Gilbert & Walsh 2005;Schr€ oder & Walsh 2007;Xiang et al 2011aXiang et al , 2011b) and the bdelloid rotifers using a coalescent approach Fontaneto et al 2007Fontaneto et al , 2008Fontaneto et al , 2009Fontaneto et al , 2011. The effects of such hidden diversity are usually overlooked in ecological studies.…”

Section: Introductionmentioning

confidence: 99%

Differences in life history characteristics among three sympatric evolutionary species of theRotaria rotatoriacomplex

Xiang

Jiang

Tao

et al. 2016

Journal of Freshwater Ecology

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The Bdelloidea rotifer, a kind of asexually microscopic invertebrate, is the largest Metazoan group that reproduces only through parthenogenesis. Here the potential evolutionary species composition was analyzed using a coalescent approach to infer independently evolving entities from a phylogenetic tree obtained from cytochrome oxidase I sequences. Three clones (HX4, HX8 and HX19) of Bdelloidea Rotaria rotatoria were selected to be the representatives of three sympatric putative cryptic taxa for detecting the effects of temperature (24, 28 and 32 ℃) on their life history traits. The results showed that the responses of life table parameters to increasing temperature were different among the three evolving entities. Evolutionary species, temperatures and their interaction significantly affected all life history parameters except that evolutionary species did not significantly affect the durations of post-reproductive period and mean lifespan. In addition, the interaction of evolutionary species and temperatures did not significantly affect the durations of postreproductive period, offspring production or net reproductive rate. No matter what the evolutionary species was, the age-specific survival curves tended to decrease earlier and more quickly, and the peak of age-specific fecundity curves appeared earlier with increasing temperature. The three potential cryptic R. rotatoria taxa adopted variable life history strategies, low reproduction and high survivorship at low temperature, as well as high reproduction and low survivorship at high temperature. The similar adaptation abilities of HX4, HX8 and HX19 to water temperatures could be the best explanation for their coexistence in the subtropical shallow pond at a high temperature.

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“…Often, morphologically very similar species from relatively distant locations show genetic divergence (Schröder & Walsh 2007), while it is less common to determine genetic differentiation in taxa sharing a common habitat and similar ecological requirements (Maltagliati et al 2004, Barluenga et al 2006. Besides, although few geographical obstacles are faced by pelagic larvae in the marine realm (Palumbi 1992, Pechenik 1999, many molecular studies of marine organisms show that genetic divergence may occur at small spatial scales or with minimal morphological diversifications (Palumbi 1992, Knowlton 1993, Tarjuelo et al 2004, Collin 2005, Bleidorn et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Molecular evidence of intraspecific variability in Lysidice ninetta (Polychaeta: Eunicidae) in the Mediterranean Sea

Iannotta¹,

Gambi²,

Patti³

2009

Aquat. Biol.

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A first study of the phylogeography of the polychaete Lysidice ninetta Audouin & MilneEdwards (Polychaeta: Eunicidae) in the Mediterranean Sea, based on analyses of the molecular markers ITS1 and COI, indicated the occurrence of strong intraspecific variability and possible sibling species. Here, we report further evidence of the presence of sibling species within L. ninetta, revealed by analysing a new molecular marker (16S rRNA) and supported by preliminary morphological observations. Specimens were collected in association with the seagrass Posidonia oceanica in 6 meadows of the Mediterranean basin; in one of the meadows in which putative siblings co-occurred (Cava meadow off the island of Ischia, Naples, Italy), additional samples were collected for genetic and morphological analysis. The mitochondrial region 16S rRNA of 78 specimens revealed 2 haplotypes (nA and nB); morphological characters, associated with these 2 molecular clades were also observed in a sub-set of the analysed specimens of L. ninetta, revealing the presence of 2 morphotypes. The morphotype termed 'dark', characterised by a typical dark colour pattern on the prostomium and first anterior segments, as well as by black aciculae all along the examined body portion, matching quite well with the description of L. ninetta from the Atlantic type locality, corresponded to haplotype nA. The morphotype termed 'light', with lighter colouration of the prostomium and first anterior segments, and both black and yellow aciculae on the examined body portion, corresponded to haplotype nB, suggesting the existence of a different species. The hypotheses that can be addressed are the following: (1) only a single new species (the light morph/genotype) is present, while the dark morph corresponds to the original L. ninetta species; (2) both morphs/genotypes (dark and light) are new taxa and need to be fully and properly described; and (3) one or both of the species corresponds to previously described species, synonymised by previous authors as L. ninetta. In all cases there is an urgent need for revision of the genus Lysidice and the nominal species in the Mediterranean Sea basin. This is a complex task far beyond the scope of this work.

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Cryptic speciation in the cosmopolitan Epiphanes senta complex (Monogononta, Rotifera) with the description of new species

Cited by 59 publications

References 33 publications

High diversity in Keratella cochlearis (Rotifera, Monogononta): morphological and genetic evidence

High diversity in Keratella cochlearis (Rotifera, Monogononta): morphological and genetic evidence

Differences in life history characteristics among three sympatric evolutionary species of theRotaria rotatoriacomplex

Molecular evidence of intraspecific variability in Lysidice ninetta (Polychaeta: Eunicidae) in the Mediterranean Sea

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