Adição de registros de Cosmarium Corda ex Ralfs (Conjugatophyceae, Desmidiaceae) para a região Nordeste do Brasil

Abstract

RESUMO A partir do estudo taxonômico de desmídias em ambientes lóticos e lênticos da Área de Proteção Ambiental Litoral Norte, Bahia, Brasil, foram catalogados 35 táxons pertencentes ao gênero Cosmarium Corda ex Ralfs, dos quais 33 estão sendo registrados pela primeira vez para a flora ficológica do Nordeste do Brasil, incluindo táxons pouco conhecidos e outros redescobertos após 100 anos da última citação, como C. trinodulum Nordst. var. brasiliense Borge e Cosmarium horridum Borge. Os materiais estudados provieram de amostras coletadas em dois períodos, no verão (janeiro-março de 2009) e no inverno (junho-agosto de 2009). São fornecidas descrições e comentários com táxons afins, bem como ampliada a distribuição geográfica destes no Brasil.

Periphytic algal flora of the low Doce river, Espírito Santo State, Brazil, after ore tailings flow, 1: smooth cell walled Cosmarium Corda (Zygnematophyceae, Desmidiaceae.

“…Ralfs 1848, West & West 1895, 1902, Croasdale 1956, Scott & Grönblad 1957, Krieger 1932) and recent papers (e.g. Coesel & Meesters 2007, Oliveira et al 2016, Bicudo et al 2019.…”

“…L: 12-16.9 µm; W: 9.4-14 µm; I: 2.8-3.9 µm. Note: According to Oliveira et al (2016), Cosmarium contractum var. sparsipunctatum differs from the typical variety in its smaller dimensions, punctate cell wall, elliptical semicells, and a more round and broad isthmus.…”

“…Over 600 Cosmarium taxa were recorded for Brazil (Biolo & Bicudo 2018), and the genus was more intensively studied in the south region where numerous taxonomic studies revealed its presence in both phytoplankton and periphyton of reservoirs and rivers. Recent floristic studies recording the presence of Cosmarium in Brazil include States such as Paraná (Silva & Cecy 2004, Bortolini et al 2010, Felisberto & Rodrigues 2010, Biolo et al 2013, Menezes et al 2011, Carvalho et al 2015, Aquino et al 2016, Osório et al 2018, Rodrigues & Moresco 2021), São Paulo (Bicudo et al 2019, Felisberto & Rodrigues 2010, Bahia (Oliveira et al 2010, Oliveira et al 2011, Oliveira et al 2016, Ramos et al 2018, Ramos et al 2021, Goiás (Felisberto & Rodrigues 2004), Distrito Federal (Estrela et al 2011), Amazonas (Saturnino et al 2020), Sergipe (Burle et al 2020), Mato Grosso and Rio de Janeiro (Kanetsuna 2004). Furthermore, in the last 10 years five new species of Cosmarium were described based on Brazilian material: Cosmarium bahianum G.J.P.…”

Some interesting desmids (Desmidiaceae, Zygnematophyceae): first records, taxonomic notes, and distribution for the Amazon Brazilian flora

“…Geographic distribution in Brazil. Bahia (Oliveira et al 2016), Federal District (Senna et al 1998;Estrela et al 2011), Mato Grosso (Borge 1903(Borge , 1918 and São Paulo (Borge 1918;Bicudo et al 2019).…”

Periphytic algal flora of the low Doce river, Espírito Santo State, Brazil, after ore tailings flow, 1: smooth cell walled Cosmarium Corda (Zygnematophyceae, Desmidiaceae

“…Over 600 Cosmarium taxa were recorded for Brazil (Biolo & Bicudo 2018), and the genus was more intensively studied in the south region where numerous taxonomic studies revealed its presence in both phytoplankton and periphyton of reservoirs and rivers. Recent floristic studies recording the presence of Cosmarium in Brazil include States such as Paraná (Silva & Cecy 2004, Bortolini et al 2010, Felisberto & Rodrigues 2010, Biolo et al 2013, Menezes et al 2011, Carvalho et al 2015, Aquino et al 2016, Osório et al 2018, Rodrigues & Moresco 2021), São Paulo (Bicudo et al 2019, Felisberto & Rodrigues 2010, Bahia (Oliveira et al 2010, Oliveira et al 2011, Oliveira et al 2016, Ramos et al 2018, Ramos et al 2021, Goiás (Felisberto & Rodrigues 2004), Distrito Federal (Estrela et al 2011), Amazonas (Saturnino et al 2020), Sergipe (Burle et al 2020), Mato Grosso and Rio de Janeiro (Kanetsuna 2004). Furthermore, in the last 10 years five new species of Cosmarium were described based on Brazilian material: Cosmarium bahianum G.J.P.…”