Fig. 5 in Gut anatomy and ultrastructural features of the paunch epithelium in the Neotropical termite Serritermes serrifer (Blattaria, Isoptera, Serritermitidae)

Fig. 5. Ultrastructure of paunch wall of a pseudergate of Serritermes serrifer. (A) and (B) The epithelium (ep) is relatively thicker in the region of the nucleus (n). Note the basal invaginations (bi) and the different bacteria morphotype (b), some of them adhered to the apical cuticle. Externally, circular (cm) and longitudinal (lm) muscular sheets involve the paunch epithelium.