Hello Your individual is Neophrissoma umbrinum (White ) and this genus although composed of two species, the other one which is rotundipenne and of which Riana had sent me the photo of the type and according to this photo N rotundipenne it would be a synonym either of Phrissoma crispum or P reichei but I would lean more P reichei.... To confirm that I would have to see the typus.... Here is my opinion...