FIGURES 40–44. Thalassionema baculum. Figs 40, 41 in New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap

FIGURES 40–44. Thalassionema baculum. Figs 40, 41. Valves as seen in LM, Fig. 40 the holotype, GU44I-1. Fig. 42. Whole mount in SEM, GU44I-1. Fig. 43. Detail of valve exterior, showing simple occluding bars over the areolae. Fig 44. Detail of interior, showing rimoportula (arrow) and foramina, GU44BF-1A. Scale bars: Figs 40–42 = 5 µm, Figs 43, 44 = 2 µm.