Table 2 Morphological characteristics of Cosmarium hexagonm sp. nov. and related taxa
From: Diversity of phytoplankton species in Cheonjin Lake, northeastern South Korea
| C. hexagonum sp. nov. | C. praecisum | C. polygonatum | C. polygonum f. rectum | C. polygonatum var. hexagonum | |
|---|---|---|---|---|---|
| Semicell shape in front view | Rhomboid | Transversely hexagonal | Hexagonal | Hexagonal | Broadly hexagonal |
| Semicell shape in vertical view | Octagonal | Ellipsoid | Ellipsoid | Ellipsoid | Ellipsoid |
| Wall scrobiculation | Median conical tubercles | Median tubercles | Median tubercles | Median conical tumor | Median tumor and one small granule at each angles |
| Cell length | 25–27 μm | 13–18 μm | 8–14 μm | 14 μm | 9.2–9.9 μm |
| Cell broad | 24–25 μm | 13–19 μm | 9–17 μm | 12.5 μm | 9.2 μm |
| Isthmus | 5–6 μm | 3–6 μm | 3.5–5 μm | 4 μm | 2.5 μm |