Oocystis apicurvata sp. nov. (Oocystaceae, Trebouxiophyceae), a new species of green algae from Chapada Diamantina, northeast Brazil

Ramos, Geraldo José Peixoto; Bicudo, Carlos Eduardo de Mattos; Moura, Carlos Wallace do Nascimento

doi:10.1007/s40415-014-0118-6

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…New species of microchlorophytes continue to be described at steady rate ( e . g ., [ 2 , 12 , 74 – 78 ]), sometimes even in groups in which the taxonomy is presumptively consolidated [ 79 , 80 ]. This suggests that the real species diversity for many groups of microchlorophytes is not yet adequately known, and therefore it is difficult to understand how reliable DNA delimitation analyses may be for these algae.…”

Section: Discussionmentioning

confidence: 99%

DNA-Based Taxonomy in Ecologically Versatile Microalgae: A Re-Evaluation of the Species Concept within the Coccoid Green Algal Genus Coccomyxa (Trebouxiophyceae, Chlorophyta)

et al. 2016

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Coccomyxa is a genus of unicellular green algae of the class Trebouxiophyceae, well known for its cosmopolitan distribution and great ecological amplitude. The taxonomy of this genus has long been problematic, due to reliance on badly-defined and environmentally variable morphological characters. In this study, based on the discovery of a new species from an extreme habitat, we reassess species circumscription in Coccomyxa, a unicellular genus of the class Trebouxiophyceae, using a combination of ecological and DNA sequence data (analyzed with three different methods of algorithmic species delineation). Our results are compared with those of a recent integrative study of Darienko and colleagues that reassessed the taxonomy of Coccomyxa, recognizing 7 species in the genus. Expanding the dataset from 43 to 61 sequences (SSU + ITS rDNA) resulted in a different delimitation, supporting the recognition of a higher number of species (24 to 27 depending on the analysis used, with the 27-species scenario receiving the strongest support). Among these, C. melkonianii sp. nov. is described from material isolated from a river highly polluted by heavy metals (Rio Irvi, Sardinia, Italy). Analyses performed on ecological characters detected a significant phylogenetic signal in six different characters. We conclude that the 27-species scenario is presently the most realistic for Coccomyxa and we suggest that well-supported lineages distinguishable by ecological preferences should be recognized as different species in this genus. We also recommend that for microbial lineages in which the overall diversity is unknown and taxon sampling is sparse, as is often the case for green microalgae, the results of analyses for algorithmic DNA-based species delimitation should be interpreted with extreme caution.

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Section: Discussionmentioning

confidence: 99%

DNA-Based Taxonomy in Ecologically Versatile Microalgae: A Re-Evaluation of the Species Concept within the Coccoid Green Algal Genus Coccomyxa (Trebouxiophyceae, Chlorophyta)

et al. 2016

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“…For the Amazon hydrographic region the monotypic new genera Eunotioforma Kociolek & Burliga and Bicudoa C.E.Wetzel et al (Wetzel et al 2012a;Burliga et al 2013), as well as a species of Tursiocola R.W.Holmes et al (Wetzel et al 2012b) and another of Aulacoseira Thwaites (Tremarin et al 2013b) were described. A new species of Oocystis A.Braun (Ramos et al 2015) was described from the West Atlantic hydrographic region. Three new species of Diatomaceae (one Eunotia and two Aulacoseira) described have wider distribution and span through two or more hydrographic regions (Metzeltin & Tremarin 2011;Tremarin et al 2012;Tremarin et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Update of the Brazilian floristic list of Algae and Cyanobacteria

Menezes¹,

Bicudo²,

Moura³

et al. 2015

Rodriguésia

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An updated synthesis of cyanobacteria and algae information is presented for Brazil aiming to refine the data gathered to date and evaluate the progress of the biodiversity knowledge about these organisms in the country since the publication of the Catálogo de Plantas e Fungos do Brasil. The results of 2015 showed an increase of 1,250 species (35.7%) when compared to 2010, reaching a total of 4,747 species. The most diverse classes in species number were the Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae and Euglenophyceae. Bacillariophyceae and Cyanophyceae had the highest increase in species number in the five-year interval. The Southeast and South regions were the most diverse, however, the Northeast, with the states of Piauí and Sergipe, and the Central-west region, with Mato Grosso, Goiás and Distrito Federal, also stood out in the national algal biodiversity scenario. Despite the shortage of taxonomists and limited infrastructure, the results showed a significant improvement in the knowledge regarding the diversity of cyanobacteria and algae in the country during the study period, starting to even out regional geographical differences caused by subsampling. Key words: Biodiversity, phycology. ResumoApresenta-se uma síntese atualizada de informações sobre algas no Brasil objetivando refinar os dados reunidos até o presente, bem como avaliar os avanços sobre o conhecimento da diversidade de algas no país desde a publicação do Catálogo de Plantas e Fungos do Brasil. Os resultados de 2015 mostraram um acréscimo de 1.250 espécies (35.7%) a um total de 4.747 em relação a 2010. As classes mais diversas em número de espécies foram Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae e Euglenophyceae. Bacillariophyceae e Cyanophyceae tiveram o maior acréscimo de espécies no intervalo de cinco anos. A região Sudeste e Sul foram as mais diversas, porém, as regiões Nordeste com os estados do Piauí e Sergipe e Centro-Oeste com os estados de Mato Grosso, Goiás e Distrito Federal destacaram--se no cenário da biodiversidade nacional. Apesar da escassez de taxonomistas e da infraestrutura limitada, os resultados obtidos evidenciaram um avanço significativo no conhecimento da diversidade de algas no país nesse período de cinco anos, iniciando uma mudança quanto as diferenças geográficas regionais. Palavras-chave: Biodiversidade, ficologia.

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“…Hence, the south region (Marimbus do Baiano), where most of the present study samples were gathered, is the only one officially unprotected (Fig 11B). Some papers are reporting the rich biodiversity from that area, including plants and fishes (Moura & Marques 2007;França et al 2010;Lima et al 2012), as well as a number of endemic and rare species of algae, especially chlorophytes and desmids (Ramos et al 2015;2020;Costa et al 2018;2020). Currently, that area has been quite used also for tourist activities, such as Stand-Up paddle or paddle yourself with Canadian canoes.…”

Section: Conservationmentioning

confidence: 99%

How hidden is the diversity of the genus Cosmarium (Desmidiaceae) in the Brazilian Caatinga?

2021

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The Caatinga domain is the largest and most diverse tropical semiarid ecoregion of South America; however, little is known about the diversity of desmids it harbors, especially the genus Cosmarium (Desmidiaceae, Zygnematophyceae). Our study contributes to the knowledge of Cosmarium in the Caatinga through the report of 42 interesting taxa, including a new species (Cosmarium imperiale), 22 new records for South America, and 19 additions to the desmid flora from Brazil. The samples were gathered from periphytic material from the "Pantanal dos Marimbus" in the Chapada Diamantina region of Northeast Brazil. We provide taxonomic notes, ecological information, including habitat conditions with limnological data, and updated global distributions for all taxa of Cosmarium. A complementary quantitative study was performed during the last year of sampling ( 2018), which revealed that most taxa have their highest densities in the months with low precipitation and when the water's conductivity and transparency are greater. Our results also have implications for the conservation of the biota from Marimbus do Baiano and understand South America's desmids' biogeography since some rare taxa identified here were previously only known from other continents such as Europe and Africa.

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Oocystis apicurvata sp. nov. (Oocystaceae, Trebouxiophyceae), a new species of green algae from Chapada Diamantina, northeast Brazil

Cited by 6 publications

References 7 publications

DNA-Based Taxonomy in Ecologically Versatile Microalgae: A Re-Evaluation of the Species Concept within the Coccoid Green Algal Genus Coccomyxa (Trebouxiophyceae, Chlorophyta)

DNA-Based Taxonomy in Ecologically Versatile Microalgae: A Re-Evaluation of the Species Concept within the Coccoid Green Algal Genus Coccomyxa (Trebouxiophyceae, Chlorophyta)

Update of the Brazilian floristic list of Algae and Cyanobacteria

How hidden is the diversity of the genus Cosmarium (Desmidiaceae) in the Brazilian Caatinga?

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