Transmission electron micrographs (TEM) of Rapaza viridis n. gen. et sp. showing details of the feeding apparatus. A. Longitudinal TEM showing R. viridis capturing a Tetraselmis cell (arrow). The arrowhead indicates the theca (cell wall) of Tetraselmis, which is beginning to unravel. The chloroplast of R. viridis (Rcp) and the nucleus (N) containing permanently condensed chromosomes and a large nucleolus (Nu) is also visible. B. Transverse TEM through the flagellar pocket (flp) showing paraxial rods (PR), the pocket (fep) and the microtubules of the feeding rod (arrow). C. Transverse TEM through the feeding rod showing 20 microtubules organized in four rows (4-6-6-4). D. Longitudinal TEM through the feeding apparatus showing the feeding pocket ('fep' and arrows) and microtubules of the rod (arrowheads). Scale bars 5 μm in A; 1 μm in B and D; 200 nm in C.
Yamaguchi et al. BMC Evolutionary Biology 2012 12:29 doi:10.1186/1471-2148-12-29