(18-20 mm diam.) 18-20 mm diam.
[1]
(moderately deep, planar, thin (1 mm)) moderately deep, planar, thin (1 mm)
[1]
(planar, entire, wide (2-2.5 mm)) planar, entire, wide (2-2.5 mm)
[1]
(22-24 mm diam.) 22-24 mm diam.
[1]
(18-22 mm diam.) 18-22 mm diam.
[1]
(planar, entire, wide (1-2.5 mm)) planar, entire, wide (1-2.5 mm)
[1]
(18-25 mm diam.) 18-25 mm diam.
[1]
(entire, sometimes sulcate, wide (1.5-2 mm)) entire, sometimes sulcate, wide (1.5-2 mm)
[1]