Uddenitinae
The Uddenitinae , proposed by Miller and Furnish , and known from the Pennsylvanian ( U Carb ) and Lower Permian , are transitional between the ancestral Pronoritidae and the more traditional medlicottiids 
<triplet> Pennsylvanian <subj> Carb <obj> part of <triplet> Carb <subj> Permian <obj> followed by