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Issue: Vol. 640 No. 3: 12 Mar. 2024
Type: Article
Published: 2024-03-12
DOI: 10.11646/phytotaxa.640.3.5
Page range: 275-283
Abstract views: 50
PDF downloaded: 2

Achnanthidium guarulhense sp. nov. (Achnanthidiaceae, Bacillariophyta), a new diatom species from a Conservation Unit in Southeast Brazil

Universidade de Guarulhos, Laboratório de Ciências Ambientais. Praça Tereza Cristina 88, 07023-070 Guarulhos, SP, Brazil.
Universidade de Guarulhos, Laboratório de Ciências Ambientais. Praça Tereza Cristina 88, 07023-070 Guarulhos, SP, Brazil.
Instituto de Pesquisas Ambientais, Department of Ecology, Av. Miguel Estéfano 3687, 04301-012 São Paulo, SP, Brazil.
Universidade de Guarulhos, Laboratório de Ciências Ambientais. Praça Tereza Cristina 88, 07023-070 Guarulhos, SP, Brazil. Departamento de Botânica, Setor de Ciências Biológicas, Centro Politécnico, Universidade Federal do Paraná, P.O. Box 19031, 81531-980 Curitiba, PR, Brazil.
Achnanthidium biodiversity diatoms new species taxonomy ultrastructure Algae

Abstract

This study describes the new species Achnanthidium guarulhense sp. nov. from the oligo-mesotrophic Negro Lake located in a Conservation Unit in Southeast Brazil. Its morphology was analyzed through Light (LM) and Scanning Electron Microscopy (SEM). The most striking feature of the new species is its narrow linear-lanceolate axial area expanding to a linear-elliptic central area between the proximal raphe ends. This feature makes the proximal raphe ends appear more distant from each other than in other species of the genus. We also provide its ecological information and a comparison with closely related species. Our results contribute to the knowledge of the biodiversity of tropical diatoms and provide subsidies for monitoring studies.

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