Limnohydrobius melaenus
(Germar, 1823)
Limnohydrobius melaenus is a of water scavenger beetle in the Hydrophilidae. It is found in eastern North America, ranging from the Canadian Maritime provinces west to the upper Midwest and south to the southeastern United States. The species is associated with aquatic and semi-aquatic . Like other members of the , it is presumed to have aquatic larvae and terrestrial .
Pronunciation
How to pronounce Limnohydrobius melaenus: //ˌlɪmnəʊhaɪˈdrəʊbiəs mɪˈliːnəs//
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Identification
The Limnohydrobius can be distinguished from other hydrophilid genera by the combination of a strongly convex body form, short maxillary palps, and specific antennal club structure. Within the genus, L. melaenus is the only documented in eastern North America. are small to medium-sized hydrophilid beetles, typically dark in coloration with the characteristic melaenus (blackish) appearance implied by the species name. Detailed diagnostic features distinguishing L. melaenus from other congeneric species (which occur in Europe and Asia) require examination of genitalia and other subtle morphological characters.
Habitat
Aquatic and semi-aquatic environments including ponds, lakes, slow-moving streams, and marshy areas. Associated with submerged vegetation and detritus in freshwater systems.
Distribution
Eastern North America: Canada (New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec) and United States (Connecticut, Massachusetts, Maine, New Hampshire, New York, Rhode Island, Vermont, Iowa, Illinois, Indiana, Wisconsin, Virginia, North Carolina, South Carolina).
Ecological Role
As a member of the Hydrophilidae, likely contributes to nutrient cycling in freshwater through feeding on decaying organic matter and associated microorganisms.
Similar Taxa
- Hydrobius spp.Other in tribe Hydrobiusini share similar aquatic habits and body form; distinguished by antennal structure and palp length.
- Other Hydrophilidae generaMany small hydrophilids occupy similar ; Limnohydrobius is distinguished by its specific combination of convex body shape and reduced maxillary palps.
More Details
Taxonomic Note
Limnohydrobius melaenus is the only of the recorded from North America. Other species in the genus occur in the Palearctic region (Europe and Asia).
Nomenclature
Originally described as Hydrobius melaenus by Germar in 1823, later transferred to the Limnohydrobius.