Cup depth (arrow) and opening angle (arc) of a tree hole.

 
 
  Part of: Sato TC, Iwai N (2021) Choice of tree holes as oviposition sites by Kurixalus eiffingeri on Iriomote Island. Herpetozoa 34: 201-205. https://doi.org/10.3897/herpetozoa.34.e67271