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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]
Hydrophilidae, also known colloquially as water scavenger beetles, is a family of beetles. [ 1 ] [ 2 ] Aquatic hydrophilids are notable for their long maxillary palps, which are longer than their antennae . [ 3 ]
Aquatic insects live mostly in freshwater habitats, and there are very few marine insect species. [9] The only true examples of pelagic insects are the sea skaters , which belongs to the order Hemiptera, and there are a few types of insects that live in the intertidal zone , including larvae of caddisflies from the family Chathamiidae , [ 10 ...
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.
This beetle is among the largest aquatic insects. Adults can reach up to 5–5.15 cm (1.97–2.03 in) in length and 2.05 cm (0.81 in) in width. [3] [2] The larvae are up to 7 cm (2.8 in) long. The body of adults is black with a greenish or olive sheen. It has protruding eyes and reddish-black antennae. [2]
Water-penny beetles are a family (the Psephenidae) of 273 species (in 35 genera) of aquatic beetles found on all continents except Antarctica, in both tropical and temperate areas. [2] The young, which live in water, resemble tiny pennies .
Aquatic beetles including the Dytiscidae ... [151] [152] The hieroglyphic image of the beetle may have had existential, fictional, or ontologic significance. [153]
Whirligig beetles were previously grouped with other aquatic members of the Adephaga such as Dytiscidae, as members of the group "Hydradephaga". However based on molecular evidence they are currently thought to be the earliest diverging lineage of the Adephaga , and to have evolved their aquatic ecology independently from other adephagans.