Coleoptera: Elmidae and Protelmidae (World Catalogue of Insects) Vol. 14.By Jäch et al. (editors)
Manfred Jäch, Kodada Ján, Brojer Michaela, Shepard William, Čiampor Fedor. 2016. Coleoptera: Elmidae and Protelmidae. Brill Academic Pub, 340 pg.
Coleoptera: Elmidae and Protelmidae includes 151 extant genera and 1501 extant species as well as four fossil species described before 2015. Protelmidae are here elevated from tribal rank to family rank.