Cefn Coed Halt
There seems also to have been a colliery halt at Dillwyn, between Seven Sisters and Crynant, and possibly another which I haven't found a name for but is shown on the 1:25K OS map, at the junction of the incline branch serving coal levels near Coed Du, between Crynant and Cefn Coed
On closer inspection I suspect the incline was a tramway not connected to the main line, but the question about a halt remains.
Deleted pending further investigation