No, never seen one.
See the white spots on the pad?
That is the waste of the mealybugs. They are underneath that feeding on the sap of the cactus. They don't eat the plant. They generally attack at the joints or the scab where there was a splinter on the pad.
If you see one I would treat that plant right away. 1 gallon water 4 cups 70% rubbing alcohol and 10 drops of liquid dish soap. Put in sprayer and spray plant in the evening or cloudy day,not hot sun.
Let sit for about a 1/2hr. Then spray off with water. In a week or earlier if you see white spots treat again.