Vertex of the lectotype female of Megachile argentata (Fabricius, 1793), showing the ocelloccipital distance OOD (yellow line), two tangentials placed behind the lateral ocellus and along the inner margin of the compound eye (red lines), and the white rectangle with dimensions 1.1× OOD × 0.55× OOD within which the punctures were measured in our morphometric analyses.

  Part of: Praz CJ, Bénon D (2023) Revision of the leachella group of Megachile subgenus Eutricharaea in the Western Palaearctic (Hymenoptera, Apoidea, Megachilidae): A renewed plea for DNA barcoding type material. Journal of Hymenoptera Research 95: 143-198.