Debus dolosus (Blandford) Hulcr, Jiri, 2010

Hulcr, Jiri, 2010, Taxonomic changes in palaeotropical Xyleborini (Coleoptera, Curculionidae, Scolytinae), ZooKeys 56, pp. 105-119 : 106

Debus dolosus (Blandford) comb. n.

Xyleborus dolosus Blandford, 1896

Specimens examined.

Malaysia, Sarawak (holotype, BMNH); Malaysia, Sabah, Danum Valley (9 indiv., Hulcr det., MSUC.).

Diagnosis.

Elytral declivity slightly with much higher number of declivital tubercles than other Debus . Declivity flat, not excavated, not emarginate at apex. Depth of emargination varies. Similar to Debus pumilus , but uniformly brown, with more and larger tubercles on the declivity. Significant intraspecific size variation.

Comments.

Elytral declivity superficially different from other Debus spp, but its structure homologous. Few small or large tubercles in the interstriae 1 (usually 3 pairs), displaced by broadened interstriae 1 and positioned on first striae or on interstriae 2. Strial punctures greatly reduced on declivity, difficult to follow as interstria 1 broad, displacing other striae. No tubercles originating on second striae. Smaller tubercles on striae 3 and beyond, creating tuberculated area surrounding declivity. Other characters shared with Debus spp.: extended pronotal disc, triangular protibiae with large and long but sparse denticles (<7), inflated prosternal posterocoxal process, antennal club shape.

Xyleborus persimilis (Eggers) and Debus dolosus (Blandford) probably synonyms. Xyleborus persimilis (lectotype, USNM) with slightly broader, more excavated declivity. Browne (1961) suggested that Xyleborus subdolosus is only a local variety of Debus dolosus .