Agonum trigeminum
Lindroth, 1954
triple harp ground beetle
Agonum trigeminum is a small in the , measuring 8.3–10 mm in length. It is deep black in color and occurs in the eastern United States and eastern Canada. The is associated with margins of eutrophic ponds and pools with dense vegetation. It is one of several Agonum species studied as part of in turfgrass .
Pronunciation
How to pronounce Agonum trigeminum: /əˈɡoʊnəm traɪˈdʒɛmɪnəm/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Small (8.3–10 mm), deep black . Distinguished from similar Agonum by combination of size, coloration, and association with eutrophic pond margins. Specific identification characters require examination of male and other subtle morphological features typical of the .
Appearance
Deep black in color. Length 8.3–10 mm (0.33–0.39 in).
Habitat
Margins of eutrophic ponds and pools with dense vegetation.
Distribution
Eastern United States and eastern Canada.
Ecological Role
Member of ; has been observed as a predator in turfgrass where it likely contributes to of pest insects.
Human Relevance
Studied as part of in turfgrass, contributing to approaches for .
Similar Taxa
- Agonum ericetiBoth are small black Agonum associated with wetland ; A. ericeti is specifically associated with peat bogs rather than eutrophic pond margins.
- Other Agonum speciesMany share similar size and general appearance; accurate identification requires detailed examination of and other subtle characters.