Diagnosis:- It is a system of long and thin tunnels wich may have small axial apertures. Primary appertures are circular or drop-shaped, joined to the first ordrer subordinate tunnels and a thin pedicle toward the main tunnel. The whole system of borings is fether like. It may also form a complex tunnel system with sharper angles of bifurcation (Pereira et al., 2009)

Branched, network.

Category of architectural design: 2.70. Camerate network borings.