author={Grethe Rytter Hasle},
  journal={Journal of Phycology},
  • G. Hasle
  • Published 1 December 1994
  • Biology
  • Journal of Phycology
Morphologic, diagnostic characters of the subgenus Nitzschia, genus Nitzschia Hassall 1845, and the marine planktonic genus Pseudo‐nitzschia H. Peragallo in H. & M. Peragallo 1900 were compared. Colony formation by overlap of cell ends; weakly silicified, shallow, and flattened valves; an extremely eccentric raphe, not elevated above the general level of the valve; lack of con‐opea; and striated girdle bands characterize Pseudo‐nitzschia as a natural group and a genus separate from Nitzschia. 

Identification of the marine diatom Pseudo-nitzschia multiseries (Bacillariophyceae) as a source of the toxin domoic acid in Algoa Bay, South Africa

Observations of a Pseudo-nitzschia species dominant in the plankton of Algoa Bay provide the first account of this toxic diatom in the coastal waters of South Africa.

The First Finding of Pseudo-nitzschia americana (Bacillariophyta) in Russian Seas

The diatom Pseudo-nitzschia americana (Hasle) Fryxell was found in bathometric phytoplankton samples collected in Amurskii Bay, Sea of Japan, and in coastal areas of Sakhalin Island, Sea of Okhotsk,

Species Account of Marine Diatoms of the Genus Pseudo-nitzschia in San Pedro Bay, Philippines

Phytoplankton samples were collected by bucket, 20 μm mesh size plankton net and Van Dorn water sampler in San Pedro Bay, Leyte, Philippines from December 2006 to May 2008. Acidwashed valves of

A new diatom species P. hallegraeffii sp. nov. belonging to the toxic genus Pseudo-nitzschia (Bacillariophyceae) from the East Australian Current

A new species belonging to the toxin producing diatom genus Pseudo-nitzschia, P. hallegraeffii sp. nov., is delineated and described from the East Australian Current (EAC). Clonal cultures were

The study on morphological taxonomy of Pseduo-nitzschia pseudodelicatissima complex.

After investigation of the cell abundance of each species, it is concluded that the most common species distributing in Daya Bay is P. pseudodelicatissima, a kind of pelagic diatom species which distribute commonly in Chinese coastal waters.

The genus Pseudo-nitzschia (Bacillariophyceae) in Malaysia, including new records and a key to species inferred from morphology-based phylogeny

For the first time high species richness of Pseudo-nitzschia is recorded in the confined coasts of Malaysia, with a special emphasis on the poroid structure of the striae to aid in species identification.

Seasonality of Pseudo-nitzschia spp. (Bacillariophyceae) in western Scottish waters

The repeatable annual nature of the blooms suggests that deterministic forecasting of the timing of future toxic Pseudo-nitzschia spp.

Morphology, phylogeny and taxonomy of species within the Pseudo-nitzschia americana complex (Bacillariophyceae) with descriptions of two new species, Pseudo-nitzschia brasiliana and Pseudo-nitzschia linea

It is concluded that P. americana can be assigned to Pseudo-nitzschia, following previous uncertainty as to whether it might belong to Nitzschio, and differences in distribution support these morphological differences.