Pteranodon sp. private collection (undescribed) is the largest known Pteranodon skull. Derived from a sister to Pteranodon ingens YPM 2594, the Jenkins skull phylogenetically preceded the AMNH FR7515 specimen of Pteranodon.
Distinct from the YPM 2594 specimen, the Jenkins skull had a smaller rounder orbit and the crest directly over the orbit was twice as tall as the orbit itself. The posterior crest did not produce a cantilevered portion posterior to the orbit. The jugal was narrower ventrally. The jawline was more strongly convex ventrally.
The family tree of Pteranodon is here. The family tree of the Ornithocephalia and Germanodactylia is here. The expanded family tree of the Pterosauria is here.