Table 1: Suzuki and Tsuchihashi classification of lip print pattern [11].

ClassificationGroove

Type IComplete straight (clear-cut vertical grooves that run across the lips)
Type I′Partial straight (clear-cut vertical grooves that run across the lips)
Type IIBranched groove (branching Y-shaped pattern)
Type IIIIntersected groove (criss-cross grooves)
Type IVReticular pattern (grooves that form a rectangular pattern)
Type VMixed groove (grooves that do not categorize in any of the above and cannot be differentiated morphologically)