FIGURES 39–46. H in Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)

FIGURES 39–46. H. meteorou sp. nov. SEM, isotypes. Fig. 39. General aspect, exterior, bar = 5 μm. Fig. 40. General aspect, interior, bar = 5 μm. Fig. 41. Apex, exterior, bar = 2 μm. Note apical pores (arrow). Valve morphogenesis not yet complete, fissures to be filled in. Fig. 42. Apex, interior, bar = 2 μm. Note apical pores (arrow). Fig. 43. Centre, interior, bar = 2 μm. Fig. 44. Centre, exterior, bar = 2 μm. Fig. 45. Detail of Fig. 43, 2x enlargement. Note sideways tilted central raphe node. Fig. 46. Detail of Fig. 44, 2x enlargement. Note crook-shaped raphe endings.