Figure 1 from: Praz CJ (2017) Subgeneric classification and biology of the leafcutter and dauber bees (genus Megachile Latreille) of the western Palearctic (Hymenoptera, Apoidea, Megachilidae). Journal of Hymenoptera Research 55: 1-54. https://doi.org/10.3897/jhr.55.11255

Figure 1 - Female mandible of Megachile (Megachile) centuncularis; the white lines and the numbers indicate the five teeth (numbers on the right) and the four interspaces (numbers on the left); in this species, there is a partial cutting edge in the second interspace and, in front view, no visible cutting edge in the other interspaces. Picture by Andreas Müller (Müller et al. 1997).