STERRENBURG, Frithjof A.S., Mary Ann TIFFANY, Friedel HINZ, Wulf E. HERWIG & Paul E. HARGRAVES 2015 (online May 8) Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta) Phytotaxa 207(2): 143-162, 81 figs., 1 table |