Typical host plant condition for species of Microborus. 1 Standing Stereospermum tree with thick bark, with attacks of ambrosia beetles, cossonine weevils and Microborus in the lower bole (Ankarafantsika NP, Madagascar). 2 Inner side of bark with tunnels made by M. brevisetosus Jordal, starting from the entrance hole of Euplatypus madagascariensis (Schedl).