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In this study we present a taxonomic update for the Oceanian    Proceratium   . A recent ant biodiversity survey in Samoa collected an unknown    Proceratium    species, which we describe here as    Proceratium   silisili    sp. n.  This new species also presents the first record of this genus, as well as the whole subfamily   Proceratiinae  , in Samoa.    Proceratium   silisili    is clearly distinguishable from the other Oceanian    Proceratium    species based on the differences in petiole node shape, number of mandible teeth, shape of the abdominal segment IV, as well as the surface sculpture on the head. A detailed description of    P.   silisili   , high-quality specimen images, as well as an identification key to Oceanian species and a diagnostic discussion are provided.

journal of hymenoptera research

A rare ant on Samoa: first record of the cryptic subfamily   Proceratiinae   (  Hymenoptera  ,   Formicidae  ) and description of a new    Proceratium    Roger species