  We obtain Schauder estimates for a class of concave fully nonlinear nonlocal
parabolic equations of order $\sigma\in (0,2)$ with rough and non-symmetric
kernels. As a application, we prove that the solution to a translation
invariant equation with merely bounded data is $C^\sigma$ in $x$ variable and
$\Lambda^1$ in $t$ variable, where $\Lambda^1$ is the Zygmund space.
