A directions used to describe dart sac apparatus B design of landmarks (solid dots) and semi-landmarks (empty dots).

 
 
  Part of: Wu M, Shen W, Chen Z-G (2023) Land snail diversity in central China: revision of Laeocathaica Möllendorff, 1899 (Gastropoda, Camaenidae), with descriptions of seven new species. ZooKeys 1154: 49-147. https://doi.org/10.3897/zookeys.1154.86237