A water beetle is a generalized name for any beetle that is adapted to living in water at any point in its life cycle. Most water beetles can only live in fresh water, with a few marine species that live in the intertidal zone or littoral zone. There are approximately 2000 species of true water beetles native to lands throughout the world.
Hydrophilidae, also known colloquially as water scavenger beetles, is a family of chiefly aquatic beetles. Aquatic hydrophilids are notable for their long maxillary palps, which are longer than their antennae. Several of the former subfamilies of Hydrophilidae have recently been removed and elevated to family rank; Epimetopidae, Georissidae, Helophoridae, Hydrochidae, and Spercheidae. Some of these formerly-included groups are primarily terrestrial or semi-aquatic.
Hydrochus is a genus of water scavenger beetles in the monogeneric family Hydrochidae, sometimes placed in the Hydrophilidae as a subfamily Hydrochinae. The family Hydrochidae includes about 180 species, all of which are placed in the genus Hydrochus. Hydrochus has also been used for a fly genus in the family Dolichopodidae. This junior homonym is a junior subjective synonym of the genus Rhaphium.
Hydrophilus is a genus of beetles in the family Hydrophilidae, the water scavenger beetles. There are about 48 species in three subgenera in the genus: Hydrophilus, Dibolocelus, and Temnopterus.
Hydrophilus piceus is a species of beetles in the family Hydrophilidae, the water scavenger beetles. This very large aquatic beetle is found in the Palearctic and is known by the common name great silver water beetle.
Hydrophilus caschmirensis, common name large scavenging water beetle, is a species of water scavenger beetle belonging to the family Hydrophilidae.
Hydrophilus palpalis is a species of water scavenger beetles belonging to the Hydrophilinae subfamily.
Cercyon versicolor is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Megasternini is a tribe of water scavenger beetles in the family Hydrophilidae. There are at least 70 described species in Megasternini.
Megasternum concinnum is a species of water scavenger beetle in the family Hydrophilidae. It is found in Africa, Europe & Northern Asia, and North America.
Cercyon nevadanus is a species of water scavenger beetle in the family Hydrophilidae. It is found in North 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.
Megasternum is a genus of water scavenger beetles in the family Hydrophilidae. There are at least four described species in Megasternum.
Cercyon is a genus of water scavenger beetles in the family Hydrophilidae. There are at least 50 described species in Cercyon.
Hydrophilus triangularis, known generally as the giant black water beetle or giant water scavenger, is a species of water scavenger beetle in the family Hydrophilidae. It is the most common and widespread species of Hydrophilus in North America, being found across the contiguous United States, southern Canada, and Mexico.
Coelostomatini is a tribe of water scavenger beetles in the family Hydrophilidae. There are about 7 genera and more than 70 described species in Coelostomatini.
Holoparamecus is a genus of handsome fungus beetles in the family Endomychidae. There are about 17 described species in Holoparamecus.
Cercyon assecla is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Cymbiodyta acuminata, the water scavenger beetle, is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.
Hydrophilus ovatus is a species of water scavenger beetle in the family Hydrophilidae. It is found in the eastern United States from Maine south to Florida and west to Texas and Kansas, as well as southern Ontario.
