Figure 17: Electron micrograph shows the lingual papillae of the posterior region of C. sepsoides tongue, which imbricated (Im) toward the posterior direction. Most of them are large, elongated, arranged in a transverse pattern and deeply serrated (Sr) at their posterior ends (arrows). Note the presence of taste bud orifices (Tb) and wide trenches (Wt) separated between these papillae. The serrated parts at the end of each papilla cover and protect the glandular epithelium (Ge) of the anterior part in the next papilla beneath it. X500.