Neogyrinus
Guides
Gyrinus
whirligig beetle
Gyrinus is a genus of small aquatic beetles in the family Gyrinidae, commonly known as whirligig beetles. Members are strictly aquatic and live almost exclusively on the water surface, where they form conspicuous aggregations called rafts. They are native to multiple biogeographic regions including the Palearctic, Nearctic, North Africa, Asia, and Australia. The genus is distinguished from the larger Dineutus by its smaller size, exposed scutellum, and more pointed elytral apices.