Hydraenidae is a family of very small aquatic beetles, sometimes called "minute moss beetles", with a worldwide distribution. These beetles are generally 1–3 mm in length with clubbed antennae. They do not swim well and are generally found crawling in marginal vegetation. Most are phytophagous but a few saprophagous and predatory species are known.
Enochrus, a genus of water scavenger beetles, is the third-largest genus of hydrophilids with 222 species in six subgenera worldwide.
Tropisternus is a genus of hydrophilid beetles with 63 species in five subgenera in North and South America.
Tropisternus collaris, the collared water scavenger beetle, is a species of water scavenger beetle in the family Hydrophilidae. It is found in the Caribbean, North America, and South America.
Laccobius is a genus of water scavenger beetles in the family Hydrophilidae. There are more than 80 described species in Laccobius.
Hydrobiomorpha is a genus of water scavenger beetles in the family Hydrophilidae. There are about 11 described species in Hydrobiomorpha.
Enochrus blatchleyi is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Tropisternus glaber is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Ochthebiinae is a subfamily of minute moss beetles in the family Hydraenidae. There are about 14 genera and more than 650 described species in Ochthebiinae.
Crenitis is a genus of water scavenger beetles in the family Hydrophilidae. There are about 19 described species in Crenitis.
Elaphrothrips is a genus of tube-tailed thrips in the family Phlaeothripidae. There are at least 40 described species in Elaphrothrips.
Onthophagus hecate, the scooped scarab, is a species of dung beetle in the family Scarabaeidae.
Manomera blatchleyi, the blatchley walkingstick, is a species of walkingstick in the family Diapheromeridae. It is found in North America.
Stenotarsus blatchleyi is a species of handsome fungus beetle in the family Endomychidae. It is found in North America.
Tropisternus quadristriatus is a species of water scavenger beetle in the family Hydrophilidae. It is found in the Caribbean Sea and North America.
Tropisternus natator is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Oosternum is a genus of water scavenger beetles in the family Hydrophilidae. There are more than 20 described species in Oosternum.
Tropisternus mixtus is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Cyclotrachelus blatchleyi is a species of woodland ground beetle in the family Carabidae. It is found in North America.
Tropisternus columbianus is a species of water scavenger beetle in the family Hydrophilidae. It is found in Central America and North America.
