Navicula (Naviculaceae) in the periphyton of streams and new occurrences for Goiás state

Abstract

This study aimed to describe and inventory the species of Navicula present in the periphyton of the Goiás state streams, and to contribute to state records with the identification of new taxonomic characteristics. Samples were collected from nine lotic environments, where the periphytic material was removed from submerged Gramineae and stones. Afterwards, to facilitate the observation, identification, and description of specimens, slides were prepared from oxidized material. As a result, ten species were identified, four of which were newly recorded in the state: Navicula leptostriata, Navicula symmetrica, Navicula neomundana, Jarlman & and Navicula parablis. The most common taxon identified in this study was Navicula leptostriata, followed by Navicula parablis.

Key words:
Central-western Brazil; Cerrado; diatoms; taxonomy