MongoDB case insensitive query on text with parenthesis

If using the $regex operator with a "string" as input then you must quote literals for reserved characters such as ().

Normally that's a single \, but since it's in a string already you do it twice \\:

{ "myField" : { 
    "$regex" : "Ceratonereis \\(Composetia\\) costae" , 
    "$options" : "iu"
}}