Fluorescent in situ hybridization (FISH). A. FISH with 5S rDNA probe in B. stramineus. B. FISH with 5S rDNA probe in B. turiuba. C. Double-FISH with 5S rDNA probe (green) and 18S (red) in B. cf. iheringii. The boxes show the 18S rDNA signals. D. Double-FISH in B. stramineus. E. Double-FISH in B. turiuba. The arrows indicate the signals of 18S rDNA and the arrow heads indicate the signals of 5S rDNA. Bar = 10 μm.