Surface-swimmer
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Dineutus
whirligig beetles
Dineutus is a genus of whirligig beetles (family Gyrinidae) characterized by relatively large body size compared to other whirligig beetles. Adults are 9–15 mm long with smooth, shallowly lined, or grooved elytra. The genus occurs across North America and other regions, with species inhabiting the surface waters of streams and rivers. Members are distinguished from the smaller genus Gyrinus by their larger size and hidden scutellum.
Dineutus assimilis
Dineutus assimilis is a species of whirligig beetle in the family Gyrinidae, native to North America. Like other members of the genus Dineutus, it inhabits the surface of freshwater bodies where it exhibits characteristic rapid, erratic swimming behavior. The species is distinguished from congeners primarily by ventral coloration and leg pigmentation. It is part of a diverse genus of surface-dwelling aquatic beetles known for their gregarious "rafting" behavior and chemical defenses.
Dineutus carolinus
whirligig beetle
Dineutus carolinus is a species of whirligig beetle in the family Gyrinidae. It is found across the Caribbean Sea, Central America, and North America. Whirligig beetles in this genus are among the largest members of the family and are characterized by their distinctive surface-dwelling aquatic lifestyle. The species was described by LeConte in 1868.
Dineutus serrulatus
whirligig beetle
Dineutus serrulatus is a species of whirligig beetle in the family Gyrinidae, first described by LeConte in 1868. The species occurs in the Appalachian Mountains of the southeastern United States, with records from northeastern Georgia and the southwestern Carolinas. A subspecies, D. s. analis, has been recorded from Kansas and the southeastern United States.
Gyretes iricolor
Gyretes iricolor is a species of whirligig beetle described by Young in 1947. It is one of three genera of Gyrinidae occurring in Missouri and the central United States, alongside Dineutus and Gyrinus. The genus Gyretes has been documented from 64 of 75 Arkansas counties and is considered common throughout the Ozark region. Like other whirligig beetles, members of this genus inhabit the surface film of freshwater bodies.
Gyretes sinuatus
Gyretes sinuatus is a whirligig beetle (family Gyrinidae) inhabiting freshwater systems of North America. Like other gyrinids, it lives on the water surface where it feeds and forms aggregations. The genus Gyretes represents the third North American gyrinid genus alongside Dineutus and Gyrinus, and has been documented across the Ozark region and Arkansas. This species was described by LeConte in 1852.
Gyretes torosus
Gyretes torosus is a species of whirligig beetle in the family Gyrinidae. The species was described from North America in 2004. As a member of Gyretes, it belongs to a genus that is common in the Ozark region and eastern North America. Like other whirligig beetles, it is presumed to inhabit the surface of freshwater bodies. The specific epithet 'torosus' refers to a muscular or bulging appearance, likely describing some aspect of the species' morphology.
Gyrinus aeratus
Brass Whirligig Beetle
Gyrinus aeratus is a species of whirligig beetle in the family Gyrinidae, commonly known as the Brass Whirligig Beetle. It is found in both North America and Europe, representing a trans-Atlantic distribution pattern. Like other whirligig beetles, it is adapted to life on the water surface where it forms aggregations and exhibits characteristic erratic swimming behavior.
Gyrinus pectoralis
whirligig beetle
Gyrinus pectoralis is a species of whirligig beetle in the family Gyrinidae, first described by LeConte in 1868. It is found across North America, with records from Canada (Alberta, British Columbia, Labrador) and presumably throughout much of the United States. Like other whirligig beetles, it inhabits the surface waters of freshwater systems.