Pantomorus postfasciatus Hustache
Geographic distribution
An occasional minor pest
  • Argentina
    • Buenos Aires
    • Catamarca
    • Chaco
    • Córdoba
    • Corrientes
    • Entre Ríos
    • Formosa
    • La Pampa
    • Misiones
    • Salta
    • Santa Fe
    • Santiago del Estero
    • Tucumán
  • Uruguay
Other distribution
Minas Gerais, Rio Grande do Sul, São Paulo

Central, Itapúa


  • Asynonychus postfasciatus Hustache 1947: 141
  • Pantomorus postfasciatus : Wibmer & O’Brien 1986: 65
  • Naupactus postfasciatus : Morrone 1999: 160
Pantomorus postfasciatus has been frequently misidentified as Naupactus ambiguus Boheman (Lanteri et al. 2002a b; Guedes et al. 2005), which only occurs in Brazil.
It differentiates by the very prominent (but not conical) eyes; the slender and not squamose antennae; the very wide pronotum, with strongly curved flanks; and the globose elytra, covered with middle- length erect setae. The scaly vestiture is mostly pale brown, with a characteristic dark brown macula on the center of the pronotum, and three transversal dark brown stripes on the elytra (anterior, middle and posterior thirds), flanked by white scales.

Some populations are bisexual (with male and females in about similar proportions) and others are probably parthenogenetic. Females are frequently infected with the bacterium Wolbachia which induces parthenogenesis in several species of Naupactini (Rodriguero et al. 2010a). The first instar larva of P. postfasciatus was described by Marvaldi & Loiácono (1994).
Prosopis alba Grisebach (Fabaceae) in Santiago del Estero, Solanum viarium Dunal (= tropical apple) (Solanaceae) and Galega officinalis L. (Fabaceae). Solanum viarium is a perennial shrub naturally distributed in Argentina and Brazil, which has become invasive in other areas of South America, North and Central America, Africa and Australia. Galega officinalis is an herbaceous plant native of Europe and Asia.

In Argentina P. postfasciatus causes damage on Citrus sinensis (L.) Osbeck (Rutaceae), and minor damage on Medicago sativa L. (Fabaceae), Helianthus annuus L. (Asteraceae), Gossypium hirsutum L. (Malvaceae) (Lanteri 1994, Lanteri et al. 2002a), and Glycine max (L.) Merr. (Fabaceae). In Brazil (São Paulo and Minas Gerais) causes damage on Citrus spp (Lanteri et al. 2002b, Guedes et al. 2005).

It is mainly associated with vegetation of the gallery forests of Chaco and Cerrado biogeographic provinces.
  • HUSTACHE A. 1947. Naupactini de l’Argentine et des régions limitrophes (Col. Curculion.). Revista de la Sociedad Entomológica Argentina 13(1-5): 3-146.
  • WIBMER G. & O’BRIEN C.W. 1986. Annotated checklist of the weevils (Curculionidae sensu lato) of South America (Coleoptera: Curculionidae). Memoirs of the American Entomological Institute 39, 563 pp.
  • LANTERI A.A. 1994. Bases para el control integrado de los gorgojos de la alfalfa. De la Campana Ediciones, La Plata, 119 pp.
  • MARVALDI A.E. & LOIÁCONO M.S. 1994. First instar larvae in the tribe Naupactini (Coleoptera, Curculionidae). Revista Brasileira de Entomologia 38(2): 453-466.
  • MORRONE J.J. 1999. The species of Entiminae (Coleoptera: Curculionidae) ranged in America south of the United States. Anales del Instituto de Biología UNAM, Serie Zoología 70(2): 99-168.
  • LANTERI A.A. ET AL. 2002a. Gorgojos de la Argentina y sus plantas huéspedes. Tomo I: Apionidae y Curculionidae. Publicación Especial de la Sociedad Entomológica Argentina Nº 1, 98 pp.
  • LANTERI A.A. ET AL. 2002b. Weevil Injurious for Roots of Citrus in São Paulo State, Brazil. Neotropical Entomology 31(4): 561-569.
  • GUEDES J.V.C. ET AL. 2005. Chave de Identificação, Ocorrência e Distribuição dos Curculionídeos-das-raízes dos Citros em São Paulo e Minas Gerais. Neotropical Entomology 34(4): 577-584.
  • RODRIGUERO M.S. ET AL. 2010a. Wolbachia infection in the tribe Naupactini: association between thelytokous parthenogenesis and infection status. Insect Molecular Biology 19(5): 599-705.
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