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Description
The original giant flying reptile(tm), Pteranodon is a remarkable animal known from hundreds of specimens, and one of the very few extinct animals with notable sexual dimorphism; being relatively rare compared to the females, male specimens are also enormous, potentially over three times larger, and sport the impressive pointed crests the genus is known for. The early interpretation of pterosaurs as seafaring fish eaters is accurate for, and most likely inspired by Pteranodon, with specimens likely having dived and swum after fish hundreds of miles from where the Western Interior Seaway met land. Even larger Geosternbergia, or Pteranodon sternbergii (potentially rivaled in size by some undescribed specimens of P.longiceps), may have been a direct ancestor of P.longiceps.

References:
-Eaton, G.F. (1910). "Osteology of Pteranodon." Memoirs of the Connecticut Academy of Arts and Sciences, 2:1–38, pls. i–xxxi.
-Bramwell, C.D. and Whitfield, G.R. (1974). "Biomechanics of Pteranodon." Philosophical Transactions Royal Society B, 267.
-Bennett, S. C. (1987). "New evidence on the tail of the pterosaur Pteranodon(Archosauria: Pterosauria)." Pp. 18–23 in Currie, P. J. and E. H. Koster (eds.), Fourth Symposium on Mesozoic Terrestrial Ecosystems, Short Papers. Occasional Papers of the Tyrrell Museum of Paleontology, #3.
-Bennett, S.C. (1992). "Sexual dimorphism of Pteranodon and other pterosaurs, with comments on cranial crests". Journal of Vertebrate Paleontology. 12 (4): 422–434. doi :10.1080/02724634.1992.10011472 .
-Bennett, S.C. (2001). "The osteology and functional morphology of the Late Cretaceous pterosaur Pteranodon. General description of osteology". Palaeontographica, Abteilung A. 260: 1–112.
-Bennett, S.C. (2001). "The osteology and functional morphology of the Late Cretaceous pterosaur Pteranodon. Part II. Functional morphology". Palaeontographica, Abteilung A. 260: 113–153.

Description
The original giant flying reptile(tm), Pteranodon is a remarkable animal known from hundreds of specimens, and one of the very few extinct animals with notable sexual dimorphism; being relatively rare compared to the females, male specimens are also enormous, potentially over three times larger, and sport the impressive pointed crests the genus is known for. The early interpretation of pterosaurs as seafaring fish eaters is accurate for, and most likely inspired by Pteranodon, with specimens likely having dived and swum after fish hundreds of miles from where the Western Interior Seaway met land. Even larger Geosternbergia, or Pteranodon sternbergii (potentially rivaled in size by some undescribed specimens of P.longiceps), may have been a direct ancestor of P.longiceps.

References:
-Eaton, G.F. (1910). "Osteology of Pteranodon." Memoirs of the Connecticut Academy of Arts and Sciences, 2:1–38, pls. i–xxxi.
-Bramwell, C.D. and Whitfield, G.R. (1974). "Biomechanics of Pteranodon." Philosophical Transactions Royal Society B, 267.
-Bennett, S. C. (1987). "New evidence on the tail of the pterosaur Pteranodon(Archosauria: Pterosauria)." Pp. 18–23 in Currie, P. J. and E. H. Koster (eds.), Fourth Symposium on Mesozoic Terrestrial Ecosystems, Short Papers. Occasional Papers of the Tyrrell Museum of Paleontology, #3.
-Bennett, S.C. (1992). "Sexual dimorphism of Pteranodon and other pterosaurs, with comments on cranial crests". Journal of Vertebrate Paleontology. 12 (4): 422–434. doi :10.1080/02724634.1992.10011472 .
-Bennett, S.C. (2001). "The osteology and functional morphology of the Late Cretaceous pterosaur Pteranodon. General description of osteology". Palaeontographica, Abteilung A. 260: 1–112.
-Bennett, S.C. (2001). "The osteology and functional morphology of the Late Cretaceous pterosaur Pteranodon. Part II. Functional morphology". Palaeontographica, Abteilung A. 260: 113–153.