Arixyleborus sittichayai Smith, Beaver & Cognato 2020 (in Smith et al. 2020b): 133.
2.3 mm long (n = 1); 2.3 times as long as wide. This species is distinguished by the protibia posterior face flat and unarmed; antennal club as broad as tall; posterolateral carina oblique, granulate; elytral disc flat, without a transverse depression; striae not impressed on disc, feeble on declvity; declivital interstriae bearing two rows of long thick semi-erect hair-like setae, setae as long as 1.5 interstrial widths.
unknown (Smith et al. 2020b)
specimens not available for sequencing