 Although "J. pandora" is known primarily from bone fragments and an intact skull, it is the second most studied rhenanid, after "Gemuendina stuertzi".It is from "Jagorina" that the details of the skull anatomy of rhenanids are known.Although scientists know of the overall anatomy and bodyplan of rhenanids because of "G. stuertzi", very little information has been gleaned from the skulls of "G. stuertzi", as all of the specimens of that species have been greatly flattened during fossilization.