FIGURES 1–6 in Gato hyalinus gen. et sp. nov., an unusual araphid tube-dwelling diatom from Western Pacific and Caribbean islands

FIGURES 1–6: Gato hyalinus light microscopy. Figs 1–4: Live colonies and cells showing mucilage tubes and plastids. Fig. 1. Colony showing branching. A Striatella unipunctata cell (S.u.) has attached to the end of one tube and there appear to be naviculoid cells inside the tubes (some indicated by arrows). Top part of colony partially overlain by a ribbon of Hyalosira interrupta (H.i.) (GU44O-F). Fig. 2: Dividing cell in near-girdle view at apex of colony, at two focal planes. A Licmophora sp. cell (L.) is attached to the outside of the tube (GU44O-F). Fig. 3. Cell in valve view (GU44O-F). Fig. 4: Cells in valve and girdle view with some evidence of a septum (arrow) within the mucilage tube (GU44W-10). Figs 5–6: Acid cleaned valves in LM, oriented with basal pole to left. Fig. 5: Valve at two focal planes showing rimoportulae at both poles (arrows) and faint sternum (GU44Z-15). Fig. 6: Valve with two rimoportulae (arrows), sternum not visible (GU44Z-15). Scale bars: Figs 1–4 = 20 µm; Figs 5, 6 = 10 µm.