Oosternum is a genus of water scavenger beetles in the family Hydrophilidae. There are more than 20 described species in Oosternum.
Species
These 23 species belong to the genus Oosternum:
Oosternum acutheca
Oosternum aequinoctiale Motschulsky, 1855
Oosternum andersoni Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum attacomis Spangler, 1962
Oosternum attenuatum
Oosternum bacharenge Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum cercyonoides Deler-Hernández, Cala-Riquelme & Fikáček, 2014
Oosternum cicatricosum
Oosternum convexum
Oosternum costatum (LeConte, 1855) Oosternum gibbicolle Oosternum holosericeum Oosternum horni d'Orchymont, 1914 Oosternum insulare Deler-Hernández, Cala-Riquelme & Fikáček, 2014 Oosternum intermedium Oosternum latum Fikacek, Hebauer & Hansen, 2009 Oosternum luciae Deler-Hernández, Cala-Riquelme & Fikáček, 2014 Oosternum megnai Deler-Hernández, Cala-Riquelme & Fikáček, 2014 Oosternum okinawaense Hoshina, 2011 Oosternum pecki Deler-Hernández, Cala-Riquelme & Fikáček, 2014 Oosternum pubescens (LeConte, 1855) Oosternum sharpi Hansen, 1999 Oosternum simplex