Circumscription of species in the genus<i>Sirodotia</i>(Batrachospermales, Rhodophyta) based on molecular and morphological data

Lam, Daryl W.; Entwisle, Timothy J.; Eloranta, Pertti; Kwandrans, Janina; Vis, Morgan L.

doi:10.1080/09670262.2011.645885

Cited by 19 publications

(20 citation statements)

References 23 publications

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“…Pröschold et al, 2001;Vanormelingen et al, 2007;Walker et al, 2009;Bendif et al, 2011;McManus & Lewis, 2011;Neustupa et al, 2011;Ni-Ni-Win et al, 2011;Lam et al, 2012;Milstein & Saunders, 2012;Škaloud & Rindi, 2013). Although comparisons of DNA-based species delimitation and species boundaries based on integrative taxonomy are useful in this respect, we argue that DNA sequence data serve as a reliable source of data for testing species boundaries even in the absence of additional phenotypic evidence.…”

Section: Future Perspectivesmentioning

confidence: 99%

DNA-based species delimitation in algae

Leliaert

Verbruggen

Vanormelingen

et al. 2014

European Journal of Phycology

313

285

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Given the problems of species delimitation in algae using morphology or sexual compatibility, molecular data are becoming the standard for delimiting species and testing their traditional boundaries. The idea that species are separately evolving metapopulation lineages, along with theoretical progress in phylogenetic and population genetic analyses, has led to the development of new methods of species delimitation. We review these recent developments in DNA-based species delimitation methods, and discuss how they have changed and continue to change our understanding of algal species boundaries. Although single-locus approaches have proven effective for a first rapid and large-scale assessment of species diversity, species delimitation based on single gene trees falls short due to gene tree-species tree incongruence, caused by confounding processes like incomplete lineage sorting, trans-species polymorphism, hybridization and introgression. Data from unlinked loci and multi-species coalescent methods, which combine principles from phylogenetics and population genetics, may now be able to account for these complicating factors. Several of these methods also provide statistical support regarding species boundaries, which is important because speciation is a process and therefore uncertainty about precise species boundaries is inevitable in recently diverged lineages.

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Section: Future Perspectivesmentioning

confidence: 99%

DNA-based species delimitation in algae

Leliaert

Verbruggen

Vanormelingen

et al. 2014

European Journal of Phycology

313

285

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“…In very fast current, thalli are dense almost without distinct whorls, whereas in moderate current species occurs as 'typical' form. According to the mo lecular analyses, all these forms are ecotypes with very similar sequence data (Vis & shEath 1999;lam et al 2012). Typical features for Sirodotia suecica are car pogonium with hemispherical protuberance, and inde finite carposporophytes with carposporohyte filaments creeping along cortical filaments.…”

Section: Taxonomical Notesmentioning

confidence: 99%

Intensive study of freshwater red algae (Rhodophyta) in Finland

Eloranta¹,

Eloranta²,

Perämäki³

2016

Fottea

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Abstract:Freshwater red algae (Rhodophyta) were studied in Central Finland by examining 2224 rivers and brooks during the open water periods of the years 2012-2015 with supplementary sampling in S-and SWFinland, the W-coast rivers and Lapland. A total of 1957 records of algae were made. Approximately 56.2% of the studied locations had 1-6 taxa. The total taxa collected were 25, with 5 taxa new to Finland. While sampling, ecological variables were recorded and measured. The most common taxa were Batrachospermum gelatinosum (37.0%), Sheathia arcuata (10.7%), Audouinella hermannii (11.2%) and Sirodotia suecica (7.0%). Lemanea spp. (9.9%) occurred in larger rivers. Most records were from July and August, but some also in winter months. From the most rare taxa, Lemanea condensata was found in Lapland rivers, Batrachospermum vogesiacum in acid, dystrophic rivers in Central Finland, B. atrum in 7 eutrophic rivers, Kumanoa globospora in 6 rivers of Central Finland, Batrachospermum elegans in 6 and K. virgatodecaisneana in 5 harder-water rivers of SW-Finland.

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“…The red algal genus Sirodotia is a member of the exclusively freshwater order Batrachospermales and is similar in gross morphology to the genera Batrachospermum and Kumanoa (Lam et al . ). It is distinguished from these and all other genera in the order by its gametophyte having an asymmetrical carpogonial base (with a protuberance) and a carposporophyte with indeterminate gonimoblast filaments extending over the axial cortical filaments (Necchi et al .…”

Section: Introductionmentioning

confidence: 97%

“…, ; Kumano ; Lam et al . ). Species delimitation is based on gross morphology of the gametophyte; size, arrangement and shape of spermatangia, carpogonia and carposporangia; and the origin of gonimoblast filaments (Necchi et al .…”

Section: Introductionmentioning

confidence: 97%

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Phylogeography of the freshwater red alga Sirodotia (Batrachospermales, Rhodophyta) in Brazil

Paiano

Necchi

2013

Phycological Research

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Summary Considering the lack of knowledge on genetic variation on members of the freshwater red algal of the order Batrachospermales in tropical regions, phylogeographic patterns in Sirodotia populations were investigated using two mitochondrial regions: the cox2‐3 spacer and partial cox1 gene (barcode). Individuals identified as Sirodotia delicatula were analyzed from 14 stream segments across its distribution in Brazil. Phylogenetic analyses based on the ribulose‐1,5‐bisphosphate carboxylase/oxygenase large sub‐unit gene showed three clades, one representing S. delicatula, from all locations in southeastern Brazil and other regions from Brazil. The remaining samples formed two clades, which were highly divergent and distantly positioned from those of S. delicatula: 2.5–2.7% and 3.4–3.7%. This level of variation would warrant the species split of these taxa from mid‐western Brazil. A total of eight cox2‐3 spacer and nine cox1 haplotypes were observed among the 122 individuals studied. One location had two cox2‐3 haplotypes and three locations had two cox1 haplotypes; all others had a single dominant haplotype each. The existence of high intraspecific genetic variation among individuals of distinct locations (several haplotypes), but little variation within a location seems to be a pattern for the Batrachospermales. Haplotype networks showed low variation among the haplotypes from southeastern Brazil (10 locations with divergence of 0.3–1.1% for cox2‐3, 0.1–0.3% for cox1) and high variation among the haplotypes from the mid‐west region (four locations, 4.0–9.3% for cox2‐3, 6.2–8.4% for cox1). Thus, the present data clearly suggest the existence of cryptic species in Sirodotia in Brazil.

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Circumscription of species in the genusSirodotia(Batrachospermales, Rhodophyta) based on molecular and morphological data

Cited by 19 publications

References 23 publications

DNA-based species delimitation in algae

DNA-based species delimitation in algae

Intensive study of freshwater red algae (Rhodophyta) in Finland

Phylogeography of the freshwater red alga Sirodotia (Batrachospermales, Rhodophyta) in Brazil

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