Two new marine species of Chrysosphaerella (Chrysophyceae) with a reinvestigation of C. salina

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Abstract
Three marine species of Chrysosphaerella; C. salina, C. tripus sp. nov. and C. patelliformis sp. nov., were found in Seto Inland Sea, Japan. The two new species possess triangular spineless scales which are similar to those of C. triangulata but are different from the elliptical scales of other species of the genus. All three marine species possess three ridged or three armed axes of the pulley shaped bases of the spined scales. The spineless scales of the three marine species are pulley shaped and composed of a basal plate and a distal ornamentation which is an elliptical dish-like structure in C. salina and a triangular basin-like structure with three appendages in the two new species. The classification of species of Chrysosphaerella is discussed on the strength of the morphology of the scales.