Elytral-pattern
Guides
Thermonectus nigrofasciatus
Mottled Diving Beetle
Thermonectus nigrofasciatus is a diving beetle species in the family Dytiscidae, native to the eastern United States. The species name refers to the distinctive black, postmedian transverse blotch on its elytra. It is commonly known as the Mottled Diving Beetle and has been documented in over 500 observations on iNaturalist.