Descriptor : PALP: 3rd palpal segment, sensory pits - Number
Descriptor type : categorical
To evaluate the shape of the sensory pits on the palp, you have to check all around the pit using the fine focusing control of the microscop. If you don't, you can erroneously interpret an irregular shape as a regular one.
This observation can be done with a magnification of x40
PALP: 3rd palpal segment, sensory pits - Number
Hierarchy
PALP: 3rd palpal segment, sensory pits - Number | |_ PALP: 3rd palpal segment, single sensory pit - Opening versus depth {multiple irregular pits}