Thermonectus nigrofasciatus
(Aubé, 1838)
Mottled Diving Beetle
Species Guides
2Thermonectus nigrofasciatus is a diving in the Dytiscidae, native to the eastern United States. The species name refers to the distinctive black, postmedian transverse blotch on its . It is commonly known as the Mottled Diving Beetle and has been documented in over 500 observations on iNaturalist.
Pronunciation
How to pronounce Thermonectus nigrofasciatus: /ˌθɜːrmoʊˈnɛktəs nɪˌɡroʊfaˈsiːətəs/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other Thermonectus by the black, postmedian transverse blotch on the . The specific epithet 'nigrofasciatus' directly references this marking (nigro = black, fasciatus = banded).
Images
Habitat
Aquatic environments. As a member of the Dytiscidae , it inhabits freshwater systems including ponds, lakes, and slow-moving water bodies.
Distribution
Eastern United States. Distribution records also indicate presence in Middle America and North America broadly.
Behavior
As a diving , it is adapted to aquatic life with hind legs modified for swimming. Members of the Thermonectus are known to be active swimmers in freshwater .
Ecological Role
Predatory aquatic insect, contributing to regulation of in freshwater .
Similar Taxa
- Thermonectus marmoratusCongeneric with different elytral pattern; lacks the distinct postmedian transverse black blotch characteristic of T. nigrofasciatus.
More Details
Taxonomic authority
First described by Aubé in 1838.
Observation frequency
Well-documented with 546 observations on iNaturalist as of source date, indicating it is regularly encountered by naturalists.