Uropodella (Acari: Mesostigmata: Sejidae), mites unchanged from Eocene past to Holocene present
Lindquist, Evert E. and Vorontsov, Dmitry D.  Two Eocene species of peacock mites (Acari: Tetranychoidea: Tuckerellidae)
Sidorchuk, Ekaterina A. and Khaustov, Alexander A.  The fate and status of the supposed fossil tick Ixodes tertiarius Scudder, 1885
Dunlop, J.A.  Fossil labidostomatid mites (Prostigmata: Labidostommatidae) from Baltic amber
Dunlop, J.A. and Bertrand, M.  Caeculidae in amber
Coineau, Y. and Magowski, W.L.