Acupalpus dubius

Acupalpus dubius

Description

2.5 - 3mm. A small, dark brown (almost black) ground beetle with the pronotum a lighter brown. The antennae are dark but with a paler first segment. The legs are yellow-brown. The pronotum narrows towards the base and has very rounded hind angles. There is a dorsal puncture on the third elytral interval.

Similar Species

Bembidion species have a much reduced last segment to the maxillary palps.

Identification difficulty
ID checklist (your specimen should have all of these features)
  • 2.5-3mm
  • dark brown-black with the pronotum pale grown
  • antennae dark except for the pale first segment
  • legs are yellow to pale brown
  • the pronotum is widest in front of the middle, then narrows with straight sides to the rounded hind angles
  • the pronotal foviae are largely unpunctured
  • has a dorsal pore in the third elytral interval
Habitat

Wetland areas, often in moss and grass tussocks.

When to see it

March - October

UK Status

Common and widespread in England and Wales up to the midlands.

VC55 Status

Reasonably common.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Additional images

No additional images available for this species.

All NatureSpot records