RT Journal Article
SR Electronic
A1 Tusset, Eduardo Antonio
A1 Izabel Tremarin, Priscila
A1 Rodrigues Maciel, Maria Gabrielle
A1 Cavalcante, Kaoli Pereira
A1 Ludwig, Thelma A.V.
A1 de Souza Cardoso, Luciana
T1 Three new Simonsenia species (Bacillariophyta) from Brazil
JF Fottea
YR 2024
VO 24
IS 1
SP 61
OP 72
DO 10.5507/fot.2023.009
UL https://fottea.czechphycology.cz/artkey/fot-202401-0005.php
AB The genus Simonsenia is characterized by the raphe system that opens into a longitudinal channel over a marginal keel, and small circular areolae, occluded by hymens. So far, the occurrence of Simonsenia species in Brazil is known only by two records of S. delognei, documented in light microscopy. Here, are described three new species of Simonsenia, one from karst freshwater environments and two from an estuarine stream. Also, we report S. delicatula for the first time to Brazil, in a lotic freshwater body. The new species are distinguished from each other and from similar Simonsenia taxa mainly due to size, valve contour, apices shape, morphology of transapical ribs, and number of areolae rows of the striae. This study is an important contribution to the taxonomy, diversity and distribution of the genus, still underestimated, especially in estuaries and karst of tropical regions.