3.3 mm long (n = 1); 2.3 times as long as wide. This species is unique among all Xylosandrus because of the unmistakable pair of very large spines on the declivitalsummit.
May be confused with
Xylosandrus spinifer superficially resembles Diuncus spp. but can differentiated by the following characteristics: the base of the pronotum has an elongate patch of dense punctures bearing a tuft of setae; the anterior margin of the pronotum is evenly rounded, and the asperities just above the margin are of the same size, rather than with a median, larger pair; the procoxae are separated; the posterolateralcosta does not form a continuous carina, but is denticulate.