Notiophilus aeneus

(Herbst, 1806)

Brassy Big-eyed Beetle

Notiophilus aeneus, commonly called the brassy big-eyed , is a small in the . measure approximately 5–6 mm in length. The is characterized by its dark coloration with a brassy metallic tinge and notably large . It occurs in North America and exhibits activity during spring and summer months.

Pronunciation

How to pronounce Notiophilus aeneus: /ˌnoʊtiˈɒfɪləs ˈiːniˌəs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The combination of small size (5–6 mm), dark body with brassy metallic luster, and exceptionally large distinguishes this from most other . The large eyes are particularly diagnostic for the Notiophilus. Specific characters separating N. aeneus from such as N. biguttatus or N. rufipes require examination of more subtle morphological features including precise coloration, punctation patterns, and genitalic structures.

Appearance

are approximately 5–6 mm in length. The body is dark colored with a distinct brassy metallic tinge. The are disproportionately large relative to body size, a diagnostic feature of the Notiophilus. The overall body form is compact and typical of small .

Distribution

North America. Recorded from Canada and the United States.

Seasonality

are diurnally active in spring and summer.

Behavior

are , active during daylight hours. This represents an unusual pattern among , which are predominantly .

Similar Taxa

  • Notiophilus biguttatusSimilar size and large-eyed appearance; distinguished by color pattern and punctation
  • Notiophilus rufipesSimilar body form and large ; distinguished by leg coloration and other subtle characters

More Details

Nomenclatural history

Originally described as Elaphrus aeneus by Herbst in 1806, later transferred to Notiophilus.

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Sources and further reading