The skeleton problem occurred when I imported the character from daz studio to UE4

*I download a character in daz studio and use daztomaya to transfer it in maya,then I export a fbx model to UE4,but a skeleton problem occur.
for example,*The bones of the arm and hand were cut in two by a twisted skeleton which cause extra bones.(Photo 1)
Because of the extra bones,I cannot use UE4’s skeletal retarget function to map this skeleton to a humanoid standard skeleton.(photo 2)
I’m completely new to bone binding so I don’t know how to solve it.
Can someone give me a hint or help? Thank you very much.

Bones and bindings on MAYA are no problem(like this photo),But after it was imported into UE4, the skeleton had this problem.