Fig. 3

Ventral view of the trunk of Bathochodaeus charon. The size of the external aperture of the spiracles (s = 4.33 mm) is more than 15 times the aperture (0.27 mm) that opens into the pharynx (p). The large, bag-like esophagus extends out the left side of the image (backwards). Note the large, flaccid intestine leading to the rectum (r) and how the mouth, (m), which opens dorsally, protrudes beyond the anterior margin of the trunk (pb = peripharyngeal band, en = endostyle, cf = ciliated funnel, and fp = posterior giant cells of Fol’s oikoplast)