Transmission electron micrographs (TEM) of Auranticordis quadriverberis n. gen. et sp., showing different cytoplasmic components. A. High magnification TEM showing a vacuolated cytoplasm (arrowheads) and fibrous material (fs) distributed beneath the cell periphery (Bar = 0.5 μm). B. High magnification view of the black inclusions (arrowheads) (Bar = 2 μm). C. An ingested bacterium found within cytoplasm of A. quadriverberis (Bar = 0.25 μm). D. A section through the nucleus (N) showing nucleoli (arrowheads) and an invaginated area (double arrowhead) (Bar = 2 μm). E. High magnification TEM showing the nuclear envelope (arrow), the nucleus (N), and a striated band (double arrowhead) positioned between the nuclear tip and a microtubular root (arrowhead) (Bar = 0.5 μm). F. Tangential section through the flagella (arrowheads) lying within the ventral groove (gr) (Bar = 1 μm). G. A putative mitochondrion positioned near the cell periphery (Bar = 0.2 μm). An inset showing two putative mitochondria (Bar = 0.5 μm). H. TEM showing lipid globules (lg) near the posterior part of the cell (Bar = 1 μm). I. High magnification view of a Golgi apparatus (Bar = 0.5 μm).