Diversity of freshwater dinoflagellates in the State of Paraná, southern Brazil, with taxonomic and distributional notes

Abstract

Dinoflagellate taxonomy has been undergoing a comprehensive review in recent decades. Knowledge on Brazilian dinoflagellate flora remains quite incomplete, particularly regarding the size of the country. This study is the first taxonomic survey of freshwater dinoflagellates in the State of Paraná, southern Brazil. Fortyone freshwater environments were sampled in Paraná and two others on the border between Paraná and Santa Catarina during 2010-2015, and 21 dinoflagellate taxa assigned to 13 genera were identified and described based on light (LM) and scanning electron (SEM) microscopy. A new combination is proposed: Parvodinium africanum var. javanicum comb. nov. Three taxa are new records for Brazilian freshwaters: Glenodiniopsis uliginosa, P. africanum var. javanicum and Tyrannodinium edax. Taxonomic and nomenclatural comments about the recorded species as well as their known distribution in Brazil are also given.

The first floristic study of freshwater dinoflagellates (Dinophyceae) in Colombia

“…Worldwide Floristic studies on thecate dinoflagellate ensembles have reported richness from seven to twenty-two species (Ling et al, 1989;Carty, 1993;Borics et al, 2005;Hansen and Flaim, 2007;Cavalcante et al, 2017). This study, despite studying fewer systems ( 14), yielded evidence for a relative floristic richness (13 spp.)…”

“…The limited number of studies conducted in freshwater ecosystems reflects the lack of knowledge about continental dinoflagellates' ecological requirements (Grigorszky et al, 2003a;Rengefors and Kremp, 2018). Thus, the most relevant studies have emphasized community composition, geographical distribution, and blooms (Boltovskoy, 1983;Ling et al, 1989;Cavalcante et al, 2013Cavalcante et al, , 2017Craveiro et al, 2015). Although the biogeographical pattern distributions have not been unveiled, relevant information about the species' biology and life histories has been discussed (Pollingher, 1987;Moestrup and Calado, 2018).…”

“…In South America, dinoflagellate flora are still little studied; some surveys have been performed in Brazil and Argentina (Boltovskoy, 1999;Borics et al, 2005;Cavalcante et al, 2017), but none in the northwest region. Indeed, most of the Colombian studies regarding dinoflagellates are embedded in ecological assessments of the plankton of reservoirs ( Donato-Rondon, 1991;López-Muñoz et al, 2016) or included in checklists of sporadic studies carried out at different altitudes with different trophic conditions or in different systems (Ramírez et al, 2005;Jaramillo-Londoño and Aguirre-Ramírez, 2012;León-López et al, 2012).…”

Reporte de Peridiniopsis borgei Lemmermann (Dinophyceae) en aguas continentales de Perú

“…Peridiniopsis presenta una amplia distribución mundial (Krakhmalny et al 2000, Zhang et al 2012, Carty 2014, Moestrup & Calado 2018. En América del Sur los estudios taxonómicos enfocados en los dinoflagelados de ecosistemas acuáticos continentales son limitados (e.g., Boltovskoy 1973, 1975, 1999, 2003, Ascencio et al 2015, Samanez 2015, Cavalcante et al 2017) y concretamente los reportes de especies de Peridiniopsis son muy escasos (Meyer et al 1997, Boltovskoy 1999, Cavalcante et al 2017.…”

Fixação de nitrogênio pelo fitoplâncton de água doce: experimentos >i<in situ>/i< e >i<in vitro>/i< para análise da influência de fatores ambientais

“…As amostras para análise quantitativa do fitoplâncton, obtidas nas duas profundidades Bicudo, 2007); Dinophyceae (Bicudo, 2011;Cavalcante et al, 2017); Coscinodiscophyceae (Bicudo et al, 2016;Lehmkuhl et al, 2010); Bacillariophyceae (Brassac;Ludwig, 2003;Bicudo, 2008;Marquardt;Costa et al, 2017;Morais et al, 2018); e demais bibliografias especializadas para grupos menos frequentes. A análise taxonômica foi baseada nas características morfométricas de amostras populacionais (mínimo de 20 indivíduos), exceto as espécies raras.…”