Pinguiococcus pyrenoidosus gen. et sp. nov. (Pinguiophyceae), a new marine coccoid alga

SUMMARY A coccoid marine alga, collected from an aquaculture tank and maintained in culture as CCMP1144, was examined using light and electron microscopy. Young, rapidly growing cells were mostly spherical in shape, approximately 4–6 μm in diameter. Older cells often produced protrusions and pseudopodia-like extensions, giving cells an amoeboid-like appearance, but no amoeboid movement was observed and the pseudopodia-like extensions...