| Pinnularia araucanensis Lange-Bert., Rumrich & Krammer, 2000 |
| Pinnularia bacillum (Ehrenb.) Ehrenb., 1876 |
| Pinnularia balatonis (Pantocsek) F.W. Mills, 1934 |
| Pinnularia bardii Lange-Bert. & Metzeltin, 2003 |
| Pinnularia bertrandii Krammer, 2000 |
| Pinnularia biceps Greg., 1856 |
| Pinnularia bihastata (A.Mann) R.M. Patrick, 1966 |
| Pinnularia biundulata (O.Müller) Kulikovskiy & Genkal, 2010 |
| Pinnularia bogotensis (Grunow) Cleve, 1895 |
| Pinnularia borealis Ehrenb., 1843 |
| Pinnularia borealis var. islandica Krammer, 2000 |
| Pinnularia borealis var. rectangularis Carlson, 1913 |
| Pinnularia borealis var. scalaris (Ehrenb.) Rabenhorst, 1864 |
| Pinnularia borealis var. subislandica Krammer, 2000 |
| Pinnularia borealis var. sublinearis Krammer, 2000 |
| Pinnularia boyeri R.M. Patrick, 1966 |
| Pinnularia brauniana (Grunow) Studnicka, 1888 |
| Pinnularia brebissoni (Kütz.) Rabenhorst, 1864 |
| Pinnularia brebissonii (Kütz.) Rabenhorst, 1864 |
| Pinnularia brevicostata Cleve, 1891 |