Atrypanius

Members of Atrypanius are small to medium-sized cerambycids within the subfamily Lamiinae. Species-level identification requires examination of antennal proportions, elytral coloration patterns, and male genitalia. The genus can be distinguished from related Acanthocinini genera by combinations of characters including pronotal shape and elytral pubescence, though precise diagnostic features vary among species.

Native habitats include Atlantic Forest and Cerrado biomes in South America. Atrypanius lignarius has been observed in commercial plantations of Paulownia fortunei var. mikado, with infestations concentrated near forest fragments.

Primarily Neotropical: Brazil (eight states including Bahia, Espírito Santo, Minas Gerais, Paraná, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, São Paulo), Paraguay, and Argentina. GBIF records also indicate presence in Colombia.

Adults of Atrypanius lignarius are more abundant during spring and summer in Paraná state, Brazil.

Xylophagous. Larvae of Atrypanius lignarius develop in phloem and wood of stems, with documented feeding on Paulownia fortunei var. mikado, Inga sp., and multiple other woody hosts.

• Paulownia fortunei var. mikado - pest hostcommercial plantation host, first record
• Inga sp. - larval hostpods and seeds
• Holocalyx glaziovii - host
• Persea americana - host
• Pinus elliottii - host
• Theobroma cacao - host

In Atrypanius lignarius: larvae excavate galleries between bark and wood in stems up to 2 cm diameter; pupation occurs within galleries; adults emerge from logs. Development period may be extended on south-facing tree surfaces due to reduced solar exposure.

Larvae of Atrypanius lignarius create galleries with small circular or oval holes, occasional interruptions, and accumulated sawdust. Adults bore into phloem for oviposition. Emergence hole distribution may be influenced by wind direction. Adults show preference for oviposition on south-facing tree surfaces where solar radiation is lower.

Native component of cerambycid biodiversity in Atlantic Forest and Cerrado biomes. Atrypanius lignarius functions as a pest in commercial timber plantations, causing stem damage that fosters fungal proliferation and can lead to plant death.

Atrypanius lignarius is an emerging pest of economic concern in Paulownia timber plantations in Brazil, causing yellowing, premature leaf drop, wilting, and plant mortality. Infestation rates of 3% have been recorded in affected plantations. The species was previously known only from native forest hosts.

• Other Acanthocinini generaSimilar size range and general Lamiinae morphology; distinguished by pronotal and elytral character combinations requiring detailed examination
• LeptostylusOverlapping distribution and habitat; Atrypanius species generally smaller with different antennal proportions

• Cerambycidae
• Lamiinae
• Acanthocinini
• xylophagous
• forest pest
• Paulownia pest
• Neotropical
• Atlantic Forest
• Cerrado
• timber plantation pest

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• New host and injury characterization of Atrypanius lignarius (Bates, 1864) (Cerambycidae: Lamiinae)