I've blogged before about prehistoric animals named after rock stars, specifically the dinosaur Masiakasaurus knopfleri, named after Mark Knopfler, and a set of trilobites named after various Eighties alternative musicians.
Now I've learned of two new instances, thanks to a December article in the Washington Times. In 2006, paleontologist Mats E. Eriksson named Kalloprion kilmisteri, a Silurian polychaete worm, after Lemmy Kilmister of Motorhead. Then in 2012, Eriksson named another Silurian polychaete, Kingnites diamondi, after King Diamond.
(This is just my personal opinion, but I think that naming something after King Diamond is taking things too far.)
Anyway, here is a video of Lemmy and Mark Knopfler, in their pre-fossiliferous days, performing (along with many others, including David Gilmour) in a BBC comedy sketch.