Dufouriellus ater
(Dufour, 1833)
Dufouriellus ater is a predatory true in the Anthocoridae, distributed across the Palearctic region and introduced to North America. It is a small, dark-colored insect that feeds on other small arthropods. The has been observed in various temperate and is known for its role as a agent against pest insects.
Pronunciation
How to pronounce Dufouriellus ater: /duː.fɔːrˈiː.ɛ.ləs ˈeɪ.tər/
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Identification
Distinguished from other Anthocoridae by its small size, uniformly dark coloration without contrasting markings, and compact body shape. Differs from the common Anthocoris, which often shows patterned or mottled coloration. Separation from other Dufouriellus requires examination of male genitalia or detailed antennal segment proportions. The short, 4-segmented and relatively broad pronotum are useful field characters.
Images
Appearance
Small, compact true with uniformly dark (black to dark brown) coloration. Body length approximately 2–3 mm. and legs relatively short. Forewings fully developed with distinct hemelytral structure typical of Heteroptera, featuring a thickened basal portion and membranous portion. Scutellum triangular and visible. Body surface appears smooth or lightly punctured.
Habitat
Found in diverse temperate including deciduous and coniferous forests, shrublands, and anthropogenic environments. Often associated with tree bark, leaf litter, and vegetation where prey occur. Has been recorded in urban and agricultural settings.
Distribution
Native to the Palearctic region (Europe and northern Asia). Introduced and established in North America. Documented presence in Belgium and other European countries.
Seasonality
have been observed across multiple seasons; specific varies by region. Activity likely concentrated during warmer months in temperate zones.
Diet
Predatory; feeds on small arthropods including mites, aphids, , and other soft-bodied insects. Specific prey preferences vary by availability.
Behavior
Active that searches vegetation and substrate surfaces for prey. Capable of for between patches.
Ecological Role
contributing to regulation of small . Potential value in of agricultural and forestry pests.
Human Relevance
Recognized as a beneficial insect for biological pest control. Utilized or considered in programs for control of mites and small insects in greenhouse and field crops.
Similar Taxa
- Anthocoris spp.Similar size and but distinguished by patterned or mottled coloration rather than uniform dark color; often with contrasting pale markings on wings or pronotum.
- Temnostethus spp.Another dark anthocorid , but typically with different body proportions and antennal structure; requires microscopic examination for reliable separation.
More Details
Taxonomic Note
The Dufouriellus is classified in the tribe Dufouriellini, a small group within Anthocoridae characterized by particular features of the male genitalia and pretarsal structures.
Introduction History
North American are considered introduced, likely through human-mediated transport of plant material; established populations documented in multiple regions.