Fig. 2 in The Pupation Chamber of Dung Beetles (Coleoptera: Scarabaeidae: Scarabaeinae)

Fig. 2. Micromorphology of pupation chambers of Sulcophanaeus imperator (A-C) and Anomiopsoides biloba (D-E). A) Internal (white arrows) and external parts of the wall, the latter represented by a set of small, lenticular, juxtaposed pellets (black arrows) that are composed of amorphous organic matter, dung fiber, and minerals, B) Detail of the internal part of the wall composed of flat, lenticular, juxtaposed pellets (white arrow), smaller than those of the external part of the wall, C) Roof of the pupation chamber showing acicular extensions (white arrow) toward the upper pole of the brood ball, where the egg chamber was originally located; in this specimen, part of the egg chamber wall (black arrow) is preserved, D) External part of the wall formed by poorly defined pellets that are composed of minerals and a scarce amount of dung fibers, which are delimited by amorphous organic matter (black arrows) that also cover mineral grain surfaces, E) Detail of the internal part of the wall that is formed by a smooth, thin layer of amorphous organic matter that covers the internal surface of the pupation chamber.