pelagomonas pelagomonas pelagomonas is a genus of heterokont algae. it is a monotypic genus and includes a single species, pelagomonas calceolata which is a unicellular flagellate organism, an ubiquitous constituent of marine picoplankton. it is an ultra-planktonic marine alga. pelagomonas scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: stramenopiles phylum: gyrista subphylum: ochrophytina class: dictyochophyceae order: pelagomonadales family: pelagomonadaceae genus: pelagomonasr.a.andersen & g.w.saunders species: p. calceolata binomial name pelagomonas calceolatar.a.andersen & g.w.saunders description pelagomonas calceolata is uniflagellate, about 1.5 × 3 μm in size. microtubular roots, striated roots and a second basal body are absent. a thin organic theca surrounds most of the cell. there is a single chloroplast with a girdle lamella and a single, dense mitochondrion with tubular cristae. a single golgi body with swelled cisternae lies beneath the flagellum, and each cell has an ejectile organelle that putatively releases a cylindrical structure. a vacuole, or cluster of vacuoles, contains the putative carbohydrate storage product.