Philonthus cognatus
This record describes Philonthus cognatus (species). Recorded family: Staphylinidae. Recorded order: Coleoptera.
Identification and Appearance

Adults are 8 to 11 mm long. They are black in colour with a green metallic sheen on the elytra which are are profusely pitted. A distinctive feature of this species is that the underside of the first antennal segment is yellow, contrasting with the black upperside. Often found in semi-natural habitats with damp soils, such as open woodland and heath grassland.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Coleoptera (Beetles)
- Suborder
- Polyphaga
- Superfamily
- Staphylinoidea
- Family
- Staphylinidae (Rove Beetles)
- Subfamily
- Staphylininae
- Tribe
- Staphylinini
- Genus
- Philonthus
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Habitat
Often found in semi-natural habitats with damp soils, such as open woodland and heath grassland.
Seasonal Activity
All year peaking in spring and summer.
Additional species information
Recorded status
Common and widespread in Britain.
About Primitive Winged Insects: the wider group
Order-level background for Coleoptera, the group containing Philonthus cognatus. Species-specific details appear above.
Group overview
Coleoptera is the largest order of insects with over 400,000 described species, representing ~25% of all known animal species and ~40% of all insects. In the U.S. alone, nearly 30,000 beetle species have been identified.
Ecological role of the group
Beetles are prominent decomposers, especially in forests, breaking down dead wood and recycling nutrients. As predators, they reduce populations of pest insects. Many species are also important pollinators of flowering plants.
Economic and practical significance of the group
Beetles have major economic significance: leaf beetles (Chrysomelidae) and weevils (Curculionoidea) are among the most destructive agricultural pests globally, costing billions annually, while predatory species like ladybugs provide natural pest control.
Recorded sources for this group: Britannica, Smithsonian, NCSU Entomology. Imported estimates may describe particular regions or reporting periods.
Photos of Philonthus cognatus (4)
Frequently Asked Questions About Philonthus cognatus
What is Philonthus cognatus?
Philonthus cognatus is a species in the family Staphylinidae, within the order Coleoptera.
Where is Philonthus cognatus found?
Habitat: Often found in semi-natural habitats with damp soils, such as open woodland and heath grassland.
When is Philonthus cognatus active?
Philonthus cognatus: seasonal activity - All year peaking in spring and summer..
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