Comment on "Ultrapotassic magmatism in the heyday of the Variscan Orogeny: the story of the Trebíc Pluton, the largest durbachitic body in the Bohemian Massif" by Janousek et al.

This comment addresses the incorrect treatment and presentation of data from laser ablation ICP-MS U-Pb age determinations of two samples of the Trebíc Pluton. This results in inaccurate ages and error assessment, invalidating the age interpretations of the authors. To corroborate our arguments, new high-precision chemical abrasion ID-TIMS data are presented that unequivocally define the emplacement age of the Trebíc pluton.