TEM of cleaned P. calliantha frustules. Note the long, thin valves and the central nodule.

Licence: 
Creative Commons Licence
Description: 

Photographer: Thessen, Anne. Publisher: Thessen, Anne.

Creator: 
Thessen, Anne
Taxonomic name: 
Pseudo-nitzschia calliantha Lundholm, Moestrup and Hasle (Taxonomy)
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith