Atrichonotus

Members of Atrichonotus can be identified as broad-nosed weevils by the characteristic short, broad rostrum typical of Entiminae. Species-level identification requires examination of genitalic structures and other detailed morphological features. The genus is distinguished from related Naupactini genera by specific combinations of rostral, antennal, and tarsal characters established in Buchanan's original description.

Native to South America; at least one species (Atrichonotus taeniatulus) has been introduced and established in New Zealand. Distribution records from GBIF indicate New Zealand as the primary documented location for observations.

Atrichonotus taeniatulus, known as the small lucerne weevil, is an agricultural pest of lucerne (alfalfa) and has been introduced to New Zealand where it affects pasture and forage crops.

• FloresianusFloresianus sordidus has been historically confused with or discussed alongside Atrichonotus species in invasion biology literature; both are South American weevils established in New Zealand.
• NaupactusNaupactus is a closely related genus within the same tribe Naupactini, sharing the broad-nosed weevil morphology; species identification requires careful examination of rostral and genitalic characters.

• Curculionidae
• Entiminae
• Naupactini
• broad-nosed weevil
• South American origin
• invasive species
• agricultural pest

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• The New Zealand spread and distribution of the South American weevils Floresianus sordidus Hustache and Atrichonotus taeniatulus (Berg)