Melodic interval of entry: 4-5-4-4+5+8-5+8-5-4+5+8-4+
Time interval of entry: M6/6/6/9/2/4/4/10/5/7/2/4/4
Dovetail voice: [Superius]
Remarks: The fuga is based on an ID I have already asserted in another comment. It is hard to find any other structural element in this fuga, as it is quite free. The first kyrie is based on only one element, leading to the CAD.