Asterocaelum sp., cyst with spines (calcofluor) - photomicrograph René van Wezel



Genus Asterocaelum Canter, 1973


Diagnosis: Trophozoites with slender pseudopodia; some show a kind of dense axis observed light microscopically. Digestive cyst and resting stage with long thick spines. Feeding on algae, including cyanobacteria, by engulfing the whole cell. Pseudopodia resemble filopodia with a broad base.


Ecology: Reported from freshwater, in water blooms.



There are two described species in the genus:




Asterocaelum sp. - photomicrograph René van Wezel