Populus tremula, Rheden: thorax; meso- and metanotum without a pit at their rear margin
abd-7 ventrally with a small group of outwards pointing spines
the frontal appendage is remarkably sharp; cremaster (seen ventrally) with distinct but short spines (one of the outer pair was abortive)
spinulation is fine and regular
See Gregor & Patočka (2001a) and Patočka & Turčáni (2005a) for a description.