Dataset 1 - <b><i>Spiroacetals and the rise of Campanula specialists: Receptor sensitivity to host-specific floral scents</i></b>

<b>Dataset 1:</b> Concatenated alignment dataset and BEAST input file for the reconstruction of phylogenetic relationships among 11 tested bee species including <i>Campanula</i> specialists [<i>Chelostoma campanularum</i> (Megachilidae), <i>Chelostoma rapunculi</i> (Megachilidae) and <i>Hoplitis mitis</i> (Megachilidae)] and bees with other pollen preferences [generalist <i>Andrena bicolor</i> (Andrenidae), generalist <i>Apis mellifera</i> (Apidae), generalist <i>Bombus terrestris</i> (Apidae), <i>Ranunculus</i> specialist <i>Chelostoma florisomne</i> (Megachilidae), Asteraceae specialist <i>Heriades truncorum</i> (Megachilidae), <i>Echium</i> specialist<i> </i><i>Hoplitis adunca</i> (Megachilidae), generalist <i>Osmia bicornis</i> (Megachilidae) and generalist <i>Osmia cornuta</i> (Megachilidae)].