Metaventrites, lateral (left) and posterior (right) views.12 P. quirsfeldi 13 P. parki 14 P. minima 15 P. morsei 16 P. divergens 17 P. carltoni 18 P. myersae 19 P. georgiensis 20 P. copelandi and P. basalis (indistinguishable in this feature) 21 P. enigma 22 P. wagneri.