Edvardsen, Eikrem & Probert, 2011.
Johnsen et al. (1992: 241), Edvarsen & Vaulot (1996: 94), Throndsen (1997: 642, pl. 9), LeRoi & Hallegraeff (2004: 87, fig. 27)
Chrysochromulina polyepis Manton & Parke (1962: 575, figs 1–28)
Cells ovoid to subspherical, with the flagellar pole obliquely truncate and depressed centrally, 6–12 µm long, 5–9 µm wide, biflagellate; body covered in unmineral-ised scales. Body scales of 4 types: large plates with upturned rims, elliptical, c. 1.4 × 1.2 µm; numerous small plates with rims flexed towards distal surface and with 2 central bulbosities on distal surface, elliptical, c. 1.2 × 0.8 µm; narrow elliptical plates with the rim flattened against distal face, c. 1.2 × 0.6 µm, probably present in a group near flagellar pole; a few large elliptical plates, c. 2.5 × 0.9 µm, with rims and a forked excresence at one end, situated at the flagellar pole. Flagella equal or subequal, arising from a central depression, c. 25 µm long, 2–3 times length of cell body. Haptonema c. 15 µm long, 1–1.5 times body length when extended.
Southern Ocean, south of Australia; northern seas at 50°11’N 04°13’W (Manton & Parke, 1962); coastal, oceanic Europe (Throndsen, 1997).
Chrysochromulina genus description: Cells have homodynamic flagella and a coiling haptonema, and electron microscopy is usually required to identify the species. As well as being photosynthetic, these fragile haptophytes ingest picoplanktonic and nanoplanktonic organisms by phagocytosis.