Copelatus agrias

Copelatus agrias was formally described by the French entomologist Félix Guignot in 1956.
The genus name Copelatus is derived from Greek, referring to their flattened, oar-like hind legs adapted for swimming.
The specific epithet agrias is likely derived from Greek (ἀγριος), potentially meaning "wild," "savage," or "rural," although the precise reasoning behind Guignot's choice for this species is not widely documented.

Copelatus agrias is a species of diving beetle, characterized by the typical morphological features of the family Dytiscidae. These include a streamlined, generally oval and somewhat flattened body shape, which aids in efficient movement through water.
Like other members of the genus Copelatus, it possesses smooth elytra (wing covers) and powerful, oar-like hind legs fringed with stiff hairs, highly adapted for swimming.
Specific details distinguishing C. agrias from other Copelatus species often involve subtle variations in pronotal shape, elytral striation patterns, or male genitalic structures, which typically require microscopic examination and comparison with taxonomic keys. In general, they are relatively small to medium-sized beetles, often dark brown or black in coloration.

This species is a freshwater inhabitant, typically found in various aquatic environments such as ponds, marshes, slow-moving streams, and other standing or gently flowing water bodies that often contain aquatic vegetation.
Copelatus agrias has primarily been reported from West Africa. Notable records include its presence in Côte d'Ivoire (Ivory Coast), suggesting a tropical African distribution.

As a dytiscid beetle, Copelatus agrias is predatory in both its larval and adult stages. Adult beetles actively hunt and consume small aquatic invertebrates, including insect larvae (such as mosquito larvae), small crustaceans, and worms.
Diving beetles, including C. agrias, employ a unique respiration method: they carry an air bubble under their elytra, which acts as a physical gill, allowing for extended periods of submersion. They periodically surface to replenish this air supply.
The larvae, often referred to as "water tigers," are also highly predaceous, using their sickle-shaped mandibles to capture and inject digestive enzymes into their prey.

Information regarding the specific conservation status of Copelatus agrias is not readily available from major conservation organizations like the IUCN Red List.
Many insect species, particularly those with less economic or charismatic appeal, have not undergone formal conservation assessments. While specific data for C. agrias is lacking, freshwater ecosystems globally face threats from pollution, habitat destruction, and climate change, which could potentially impact local populations of this species.

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