Rhysium, Pascoe, 1866

Santos-Silva, Antonio, Galileo, Maria Helena M. & Wappes, James E., 2017, Descriptions, notes and reassignments in Neoibidionini (Coleoptera: Cerambycidae: Cerambycinae) with a new genus, three new species and keys to species of Brechmoidion Martins, 1969, Compsibidion Thomson, 1864 and Rhysium Pascoe, 1866, Insecta Mundi 2017 (560), pp. 1-21 : 16

Key to species of Rhysium

1

–

Elytra with pale yellow, longitudinal band from humerus to near apical quarter; Bolivia.......

........................................................................... R. separatum ( Martins and Galileo, 2007) Elytra without longitudinal yellow band ..................................................................................... 2

2(1).

–

Each elytron with at most two small yellow spots; Colombia R. guttiferum (Thomson, 1867) Each elytron with at least one large yellow spot ......................................................................... 3

3(2).

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Each elytron with a large yellow spot bordered distally by a curved yellow fascia placed near midlength; Bolivia.................................................. R. spilotum Martins and Galileo, 2007 Each elytron with a single large yellow spot ............................................................................... 4

4(3).

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Yellow elytral spot transverse, not reaching basal third; elytral apex rounded; Peru, Bolivia.

................................................................................................. R. bimaculatum Pascoe, 1866 Yellow elytralspot subelliptical, reaching basal quarter; elytralapex truncate (slightly concave);

Brazil (?), Colombia....................................................... R. bivulneratum (Thomson, 1867)