| 1 | | | Length > 3.7 mm. Elytron with a subapical lateral flange, pronotal striae very weak, N WA, NT, N QLD | | | grossus |
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| 2 | | | Elytron with a subapical lateral tooth, pronotal striae well marked, WA, NT, QLD, N NSW | | | denticulatus |
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| – | | | Elytron lacking lateral tooth, pronotal striae present or absent. | ► 3 |
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| 3 | | | Pronotal striae absent. | ► 4 |
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| – | | | Pronotal striae present. | ► 5 |
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| 4 | | | Length 2.55–2.65 mm, outline of junction of pronotum and elytra smooth, sides of pronotum evenly curved, maximum width at posterior angles, dorsal colour pattern usually diffuse, N WA, NT, N QLD | | | mjobergi |
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| – | | | Length 2.75–2.9 mm, outline of junction of pronotum and elytra slightly sinuate, maximum width of pronotum somewhat before base. Dorsal colour pattern strongly varying, when present, usually well marked. In some specimens pronotum yellow, in others pronotum and elytra all black, N WA, NT, N QLD | | | thoracicus |
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| 5 | | | Dorsal colour pattern diffuse. Pronotal striae well marked and long (1/4 to 1/3 of length of pronotum). | ► 6 |
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| – | | | Contrasting yellowish markings on black elytra. Pronotal striae only slightly marked and short (maximum 1/4 of length of pronotum) | ► 7 |
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| 6 | | | Body elongate oval. Pronotum as broad as elytra, outline of junction of pronotum and elytra slightly sinuate, maximum width of pronotum somewhat before base (Fig. 2). Males with mesotibia curved, length 2.2–2.25 mm, VIC, NSW, S QLD | | | bilita |
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| – | | | Body broader oval. Pronotum narrower than elytra, outline of junction of pronotum and elytra smooth, sides of pronotum evenly curved, maximum width at posterior angles (Fig. 1). Male unknown, length 1.95 mm, smallest species of the genus, NT | | | darwiniensis |
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| 7 | | | Males with mesotarsus straight. Pronotal striae well marked but short, small species, length 2.0 mm, West Papua, Indonesia | | | samkrisi |
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| – | | | Males with mesotarsus straight. Pronotal striae extremely weak and faint, larger species, length 2.35–2.65 mm, N WA, NT, N QLD. | | | flavosignatus |
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