Dineutus productus

Dineutus productus belongs to the genus Dineutus, distinguished from the smaller genus Gyrinus by its larger size (typically 10–12 mm), rounded elytral apices, and hidden scutellum. Within Dineutus, species identification relies heavily on ventral coloration, particularly leg color. Specific diagnostic features for D. productus are not well documented in available sources, though the species is known from its distinctive habitat preference for stagnant rather than flowing water.

Small, shallow, stagnant pools with muddy bottoms and abundant emergent vegetation; associated with leaf litter and woody debris. This habitat preference differs markedly from typical Dineutus species, which usually inhabit flowing water.

North America: historically recorded from Oklahoma and Texas; first documented in Kansas in 2014. The Kansas specimens were collected in the eastern part of the state.

Late June (based on collection records from Kansas).

• Dineutus discolorCommon, widespread congener in the same region; D. productus distinguished by habitat preference for stagnant pools versus flowing water, and potentially by ventral coloration
• Dineutus ciliatusShares large size and rounded elytral apices; distinguished primarily by ventral coloration including dark legs
• Dineutus emarginatusSimilar size and general form; distinguished by orange legs and association with flowing water habitats

• aquatic beetle
• stagnant water specialist
• Kansas fauna
• new state record 2014
• whirligig beetle
• Gyrinidae

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Gyrinidae | Beetles In The Bush
• New Whirligig Beetle Showcases U.S. Biodiversity Hotspot
• June | 2010 | Beetles In The Bush | Page 2
• Ozark Trail | Beetles In The Bush
• Rediscovery ofLutrochus laticepsCasey, 1893 (Coleoptera: Lutrochidae) and the Discovery ofDineutus productusRoberts, 1895 andDineutus serrulatus analisRégimbart, 1882 (Coleoptera: Gyrinidae) in Kansas, USA, with Notes on Habitat Preference