  In this article, we analyze a nonlocal ring network of adaptively coupled
phase oscillators. We observe a variety of frequency-synchronized states such
as phase-locked, multicluster and solitary states. For an important subclass of
the phase-locked solutions, the rotating waves, we provide a rigorous stability
analysis. This analysis shows a strong dependence of their stability on the
coupling structure and the wavenumber which is a remarkable difference to an
all-to-all coupled network. Despite the fact that solitary states have been
observed in a plethora of dynamical systems, the mechanisms behind their
emergence were largely unaddressed in the literature. Here, we show how
solitary states emerge due to the adaptive feature of the network and classify
several bifurcation scenarios in which these states are created and stabilized.
