Pterostichus adstrictus

Taxonomy

  • Adephaga
  • Carabidae
  • Pterostichus
  • Bothriopterus
  • Pterostichus adstrictus

Description

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Pterostichus anthracinus

Taxonomy

  • Adephaga
  • Carabidae
  • Pterostichus
  • Pseudomaseus
  • Pterostichus anthracinus

Description

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Pterostichus aethiops

Taxonomy

  • Adephaga
  • Carabidae
  • Pterostichus
  • Steropus
  • Pterostichus aethiops

Description

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Pterostichus cristatus

Taxonomy

  • Adephaga
  • Carabidae
  • Pterostichus
  • Pterostichus
  • Pterostichus cristatus

Description

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Pterostichus aterrimus

Taxonomy

  • Adephaga
  • Carabidae
  • Pterostichus
  • Lyperosomus
  • Pterostichus aterrimus

Description

Size: 13-15mm
Basic colour: Shiny black
Pronotoum: Sides rather straight and converging to rounded hind angles; foveae deep and well delimited externally.
Leg colour: Shiny black.
Confusion species: Pterostichus aethiops
, Confusion species: Pterostichus madidus

Biology

Status: Not recorded from Britain since 1973; widespread but very local in Ireland.
RDB Category: Endangered
Habitat: Wet humus in fens and bogs.
Other notes: Tarsal claw joints without ventral setae. Head with deep, curved frontal furrows anteriorly. Elytra parallel-sided, striae finely punctured, outer striae very faint; third interval with three or four deep fovate punctures. Wings present.

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Polistichus connexus

Taxonomy

  • Adephaga
  • Carabidae
  • Polistichus
  • Polistichus connexus

Description

Size: 8-9.5mm
Basic colour: Brown
Pattern colour: Head red-brown, elytra dark black-brown with an elongate pale area covering most of intervals 3-6 except the extreme apices.
Pronotoum: Red-brown. Densely punctured, not transverse, hind angles sharp but slightly obtuse.
Leg colour: Pale brown.

Biology

Status: Declining. Local and usually coastal in the extreme south and east of England.
RDB Category: Vulnerable
Habitat: Cracks and crevices, usually in clay soils or cliff bases but also on sandy or gravelly soils.
Other notes: Dorsal surface flat and pubescent throughout. Antennae entirely pubescent, basal segment wider than the remainder. Tarsal claws not toothed. Head sparsely but very strongly punctured; strongly contracted behind the protruding eyes, which have a strong row of curved hairs behind. Elytra densely punctured, intervals flat; apices transversely truncate. Wings present.

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