A third subspecies, O. c. soederstromi, is thought to be endemic to the volcano Quilotoa in Ecuador. This subspecies, however, has not been recorded since the time of its description. Moreover, the description fits that of an intergrade between the other two subspecies. Both O. c. chimborazo and O. c. jamesonii have been recorded at the type locality of O. c. soderstromi. This third subspecies, thus, may not be a valid one.