Four species of Xylonichus are listed in Tasmania.
Xylonichus dispar
Xylonichus eucalypti
Xylonichus nigrescens
Pending ID – Xylonichus
References:
Grove S.J., Forster L. G. ,Porch, N. (2021) An illustrated checklist of the insects of Tasmania. Part 1 – Coleoptera (beetles). The Royal Society of Tasmania. Hobart