Planiculus Hulcr & Cognato, 2010 Planiculus Hulcr & Cognato, 2010: 21. Type species: Xyleborus bicolor Blandford, 1894; original designation. Diagnosis. [modified from Smith et al. (2020)] Minute to small (1.59–2.8 mm), elongate (2.57–3.6× as long as wide). Declivity flat, slightly broadened laterally; lateral profile of declivity gradually descending; pronotum from dorsal view long, rounded anteriad (type 9), from lateral view elongated with low summit and elongate disc (type 8); antennal club approximately circular, obliquely truncate, type 2, segment 1 corneous, large, occupying at least basal 1/2 of club, segment 2 visible on posterior face; and protibiae distinctly triangular. The procoxae are contiguous, scutellum visible, flat, flush with elytra, the tuft on pronotal base associated with mesonotal mycangium is absent.

Published as part of Sittichaya, Wisut & Cognato, Anthony I., 2024, Planiculus angulatus, a new species of xyleborine ambrosia beetle from Thailand (Coleoptera, Curculionidae, Scolytinae, Xyleborini), pp. 482-488 in Zootaxa 5471 (4) on page 483, DOI: 10.11646/zootaxa.5471.4.7, http://zenodo.org/record/12190417