Fractured edge of the shell illustrating the shell structure with smooth outer thin layer of organic cement (large black arrow), intermediate layer of porous and fibrous organic cement (small white arrows) with incorporated mineral particles (small black arrow) and inner thick layer of organic cement (large white arrow)  
  Part of: Todorov M (2015) On the morphology, biometry and biogeography of Lamtopyxis callistoma (Amoebozoa: Arcellinida). Biodiversity Data Journal 3: e4297. https://doi.org/10.3897/BDJ.3.e4297