Platybolium, Blair, 1938

Maruyama, Munetoshi, Sasitorn, Hasin & Ando, Kiyoshi, 2023, A description of the second species of the genus Platybolium Blair, 1938 (Coleoptera: Tenebrionidae) collected from a nest of Pheidole singaporensis Özdikmen, 2010 (Hymenoptera: Formicidae) in Thailand, Zootaxa 5256 (3), pp. 289-294 : 292

Key to the species of the genus Platybolium

1. Body dorsally rugose-punctate, matte; canthus as wide as lateral length of eye; frons densely rugose-punctate, raised in a small elevation above each eye; 3 rd antennomere scarcely longer than its apical width; pronotum rugosely punctate throughout; elytra narrowly margined, carinate on each interval, 8 th and 9 th carinae abbreviated about the level of the base of last abdominal ventrite.......................................................................... P. alvearium Blair, 1938

- Body dorsally not rugose-punctate, shining; canthus wider than lateral length of eye; frons not rugose-punctate, overhanging like eaves on eyes; 3 rd antennomere distinctly shorter than its apical width (5:7); pronotum densely punctate throughout, not rugose; elytra with wide and flattened margins, carinate only 8th interval; the carina terminated before apical declivity of elytron............................................................................... P. watanai sp. nov.