This volume provides an image-rich documentation of the morphology and ultrastructure of Eunotia species from southeastern Brazil, including description of new taxa and restudy of some original materials. Moreover, it represents the fi rst combination of taxonomic and ecological approaches to the study of Eunotia in tropical and subtropical regions.
The materials studied included samples from distinct habitats (planktonic, periphytic and surface sediment) collected from 32 reservoirs of southeastern Brazil. Eighty-seven Eunotia species are illustrated with light and scanning electron microscopy on 108 plates and compared with other similar taxa. Among these, 13 taxa are reported here for the first time in Brazil, and 15 new taxa are described. Morphometric features of all taxa are described and compared with data from the literature. The ecological preferences (optima) of 19 taxa were calculated for nutrients (total phosphorus and total nitrogen), pH and conductivity. A comprehensive sample table with reservoirs, drainage basins, geographic coordinates and herbarium numbers as well as an extensive reference list complete the volume.The results of this work confirm the ecological preference of the genus for clean waters (ultraoligo- to mesotrophic). Two species (E. rhomboidea Hustedt and Eunotia maconi sp. nov.) were associated with eutrophic waters.
This survey of Eunotia species from southeastern Brazil is of general interest to all readers working on diatoms.

It is always a great help for the experts if a book guiding in the labyrinth of a diverse and complicated group of diatoms such as Eunotia come out. It is one of the largest genera of diatoms with an estimated species number of 1,500 described worldwide. This publication is a good and interesting completion for volume of Diatoms of Europe on the unique freshwater genus Eunotia. At the same time, it makes possible for a comparison between diatoms living in two continents with different environmental conditions. It is interesting to study whether which taxa live in different habitats of Brazil and Europe more thousands kilometres far from each other.
This work is restricted to a part of Brazil, to the State of São Paulo, nevertheless it provides an image-rich documentation of the morphology and ultrastructure of Eunotia species, besides their general ecology and distribution patterns. New species are formally described and discussed and some original materials described from South America restudied. The study area including 32 reservoirs with different limnological conditions (ultraoligo- to supereutrophic) also contributes to the variety of the genus and of this work, as a whole.
It is an easy-to-use guide book because it follows the conventional sectioning of the identification books according to which after a short review of the introduction and the studied area in material and method section results and discussion are shown with detailed on the other hand transparent information about the taxa, and then, of course, the photo tables come. Eighty-seven Eunotia species are illustrated with light and scanning electron microscopy on 108 plates and compared with other similar taxa. Among these, 13 taxa are reported here for the first time in Brazil, and 15 new taxa are described. Morphometric features of all taxa are described and compared with data from literature.
This work is a useful help for the diatomists, algologists, students who would like to get to know better these diverse group of diatoms.

Zs. Trábert

Acta Botanica Hungarica 60(1–2),p. 238, 2018