Abstract:
Based on a diatom diversity investigation in Jiuzhaigou Valley Natural Reserve,five species of Monoraphidales (Bacillariophyta) are reported as new records in China,namely
Achnanthidium pfisteri Lange-Bertalot,
Achnanthidium rosenstockii(Lange-Bertalot) Lange-Bertalot,
Platessa ziegleri(Lange-Bertalot) Lange-Bertalot,
Psammothidium lauenburgianum(Hustedt) Bukhtiyarova&Round,and
Psammothidium scoticum Bukhtiyarova&Round.The microstructures of these five species were observed using LM and SEM,and their taxonomic characters and habitats were described here in detail.