| Character | Infrantenna gen. nov. | Psicula Lesne, 1941 | Xylion Lesne, 1941 | Xylobosca Lesne, 1901 | Xyloblaptus Lesne, 1901 | Xylopertha Guérin-Méneville, 1845 |
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| No. of antennal segments | 10 | 9 | 10 | 10 | 10 | 10 |
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| Antennal fossa insertion | Below fronto-clypeal suture. | Above fronto-clypeal suture. | Above fronto-clypeal suture. | On fronto-clypeal suture. | Above fronto-clypeal suture. | Above fronto-clypeal suture. |
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| Long hairs on frons | X | Directed upwardly | X | Directed upwardly, long to very long in female, short or absent in male. | Long upwardly at sides, short upward in middle. | Directed upwardly |
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| Posterior angles of pronotum | Without lateral carina | Without lateral carina | With lateral carina | Without lateral carina | Without lateral carina | Without lateral carina |
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| Pleural pieces | V | X | V | V | X | V |
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| Shape of disc of elytral declivity | Male: concave Female: convex | Male: concave Female: convex | Slightly convex | Male: concave Female: convex | Slightly, evenly concave | Male: weakly to strongly concave Female: convex |
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| Sculpture of apical margin of declivity | Male: with a small V-shaped emargination at apex. Female: apex of each elytron strongly emarginate, emargination filled by a pair of ventrally- directed processes next to suture. | Male: without an apical emargination. Female: apex of each elytron strongly emarginate, emargination filled by a pair of ventrally- directed processes next to suture. | Both sexes with deep emargination at apex and rised tip. | Male: not emarginate at apex Female: emarginate. | Entire, raised slightly at apex. | Male: with a small V-shaped emargination at apex. Female: apex of each elytron strongly emarginate. |
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| Modified ventrites of female abdomen | 5th ventrite strong emarginate in middle posteriorly. | 5th ventrite strong emarginate in middle posteriorly. | Variously modified from 3rd to 5th ventrites, strong emargination at posterior margin of 5th ventrite | 1st ventrite enlarged; 4th and 5th ventrites emarginate in middle posteriorly; 4th ventrite with a pair of spines in some species. | 5th ventrite strong emarginate in middle posteriorly. | 5th ventrite variously modified. |
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| Protibia | Wider at apex than in middle, external face broadly grooved. | Widest close to apex, external face flattened. | Widest at apex, external face more or less fl attened | Widest towards middle, without a flat external face | Widest towards middle, without a flat external face | Widest at apex, grooved on external face |
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| Geographical distribution | Northern Thailand | India and Thailand | Africa | Australia | USA and Mexico | Mediterranean |
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| Character | Calonistes Lesne, 1936 | Infrantenna gen. nov. | Octodesmus Lesne, 1901 | Octomeristes Liu & Beaver, 2016 | Paraxylion Lesne, 1941 | Psicula Lesne, 1941 |
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| No. of antennal segments | 10 | 10 | 8 | 8 | 10 | 9 |
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| Sensory impressions on club | Without distinct impressions, only areas with denser pores. | Two zones of concentration of sensory pores on 1st and 2nd antennomeres of club. | Dense sensory hairs along anterior margin on 1st and 2nd antennomeres of club. | Dense sensory hairs along anterior margin on 1st and 2nd antennomeres of club. | Dense sensory hairs along anterior margin on 1st and 2nd antennomeres of club. | Without distinct impressions, only areas with denser pores. |
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| Clypeus armed on sides | X | X | X | X | X | X |
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| Long hairs on frons | X | X | X | V | V | V |
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| Lateral carinae of pronotum | X | X | X | X | X | X |
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| Pleural pieces | X | V | X | V | V | X |
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| Shape of disc of elytral declivity | Concave evenly | Male: concave Female: convex | Slightly concave | Weekly convex | Flatten | Male: concave Female: convex |
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| Sculpture of apical margin of declivity | Entire, raised slightly at apex. | Male: with a small V-shaped emargination at apex. Female: apex of each elytron strongly emarginate, emargination filled by a pair of ventrally- directed processes next to suture. | Rised with a tiny V-shaped emargination. | Emarginated | Entire | Male: without an apical emargination. Female: apex of each elytron strongly emarginate, emargination fi lled by a pair of ventrallydirected processes next to suture. |
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| Modified ventrites of female abdomen | 4th ventrite extended over 5th as a thin, leaflike, plate, convex ventrally. The middle part of the 5th ventrite,slightly emarginate | 5th ventrite strong emarginate in middle posteriorly. | X | 3rd ventrite projecting over and concealing fourth ventrite, its posterior margin with lobes or teeth. | X | 5th ventrite strong emarginate in middle posteriorly. |
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| Protibia | Expanded from base to apex, external face convex. | Wider at apex than in middle, external face broadly grooved. | Wider at apex than in middle,external face flattened. | Wider at apex than in middle, external face flattened. | Expanded from base to apex, external face grooved. | Widest close to apex, external face flattened. |
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| Distribution | Malaysia and Thailand | Northern Thailand | India and Burma | India and Thailand | India and Southeast Asia | India and Thailand |
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