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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. [1]
Liocanthydrus are aquatic beetles most commonly collected in lotic (flowing-water) habitats. Specimens have typically been found along the margins of such habitats or in debris such as logs, leaf packs, or root mats. [4] [6] They are generally rare. [5]
Diving beetles are the most diverse beetles in the aquatic environment and can be found in almost every kind of freshwater habitat, from small rock pools to big lakes. Some dytiscid species are also found in brackish water. [24] Diving beetles live in water bodies in various landscapes, including agricultural and urban landscapes.
These beetles are relatively small, ranging from 1 to 6 mm, with smooth oval bodies ranging from light brown to a darker reddish brown. The head is short and somewhat covered by the prothorax . Both adults and larvae are aquatic, and are commonly found around plants.
Aquatic insects or water insects live some portion of their life cycle in the water. They feed in the same ways as other insects . Some diving insects, such as predatory diving beetles , can hunt for food underwater where land-living insects cannot compete .
Meruidae is a family of aquatic beetles in the suborder Adephaga, [1] with only one genus and species, Meru phyllisae. The beetle species was first found in the early 1980s. [2] and fully described in 2005. At 0.8 mm (0.031 in), it is one of the smallest adephagan beetles in the world.
Dytiscus are large water beetles with a robust, rounded shape and they measure 2.2–4.4 cm (0.9–1.7 in) long depending on the exact species involved. [1] The largest, D. latissimus , is among the largest species in the family and its size is only matched by certain Megadytes . [ 1 ]
Donacia is a large genus of aquatic leaf beetles in the subfamily Donaciinae. Like other members of that subfamily, the beetles have long antennae. They are active and able to fly. Larvae feed on submerged portions of aquatic plants, such as water lilies, and breathe oxygen from plant vessels. Adults live on surface parts of the same plants.