Schmelzle S, Helfen L, Norton RA, Heethoff M. The ptychoid defensive mechanism in Euphthiracaroidea (Acari: Oribatida): A comparison of exoskeletal elements. Soil Org. 2008;80(2):233. Accessed May 1, 2025. https://www.soil-organisms.org/index.php/SO/article/view/21