So, I started a new research project a few years ago in an area that is interdisciplinary and new for me. Hired a PhD student to work on it. It has been going very well, we've published a couple of papers and I asked student to apply to give talks at conferences/workshops etc. I usually try to give them a lot of credit and visibility and independence.
Anyhow, student has been giving these talks etc (he doesn't mention I'm his supervisor and usually will pass off things I've said to him as his own) . Some of these have been closed talks (i.e I couldn't join) and now he's being asked to be part of discussions that I would generally have been participating in. He does let me know what has gone on but I feel a bit like I'm losing control of my research. He's a good student, not exceptional, but diligent and hardworking. However, definitely not at a stage where he's a panel member with senior faculty etc. I don't want to seem petty or like I don't want the student to get his due but I feel like I've been painted out of my own research project. Any ideas?