  We present the first detection of a rotationally affected series consisting
of 36 consecutive high-order sectoral dipole gravity modes in a slowly
pulsating B (SPB) star. The results are based on the analysis of four years of
virtually uninterrupted photometric data assembled with the Kepler Mission, and
high-resolution spectra acquired using the HERMES spectrograph at the 1.2 meter
Mercator Telescope. The spectroscopic measurements place KIC7760680 inside the
SPB instability strip, near the cool edge. The photometric analysis reveals the
longest unambiguous series of gravity modes of the same degree l with
consecutive radial order n, that carries clear signatures of chemical mixing
and rotation. With such exceptional observational constraints, this star should
be considered as the Rosetta Stone of SPBs for future modelling, and bring us a
step closer to the much needed seismic calibration of stellar structure models
of massive stars.
