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Actinella gessneri Hustedt (Eunotiaceae, Bacillariophyceae), a rare and endemic species in Amazonian blackwater, Brazil

2024; Q15088586; Volume: 636; Issue: 2 Linguagem: Inglês

10.11646/phytotaxa.636.2.5

1179-3163

João Marcos Souza Coêlho, Elton Augusto Lehmkuhl, CAMILA CARIME AZEVEDO DE ARAÚJO, Thelma Alvim Veiga Ludwig, Angela Maria da Silva-Lehmkuhl,

Aquatic Ecosystems and Phytoplankton Dynamics

Actinella gessneri Hustedt is a rare and poorly known Amazonian diatom species. Low records and restricted distribution to acid waters suggest that this species may be threatened with extinction. We record a new occurrence of Actinella gessneri Hustedt in Amazonian blackwaters, providing detailed images on LM and SEM, and approaching ecological aspects concerning habitat, quality water and hydrological periods.