Note: This historical image is not a factually accurate dinosaur restoration.
Reason: The head of Elasmosaurus was erroneously placed by Cope on the "short end" now known to be the tail. The mosasaur has a long neck, and the Dryptosaurus has too many fingers, a too small head, and is in a "tripod-pose".
You may ask further questions about the accuracy of this image at the image review page of WikiProject Dinosaurs on the English Wikipedia. Note that this image may be appropriate to illustrate obsolete paleontological views.
Summary
DescriptionLaelaps-cope.jpg
English: Dryptosaurus (formerly Lealaps) confronting Elasmosaurus orientalis, with Mosasaurus and Osteopygis behind. Hadrosaurus forages in background, and Thoracosaurus crawls up on the banks. Note that the head of Elasmosaurus was erroneously placed by Cope on the "short end" now known to be the tail.
From: Cope, E.D. "The fossil reptiles of New Jersey," in: American Naturalist, vol. 3 (1869), pp. 84-91.
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.
{{Information |Description={{en|1=''Dryptosaurus'' (formerly ''Lealaps'') confronting ''Elasmosaurus''. ''Hadrosaurus'' foraging in background. From: Cope, E.D. "The fossil reptiles of New Jersey," in: American Naturalist, vol. 3 (1869), pp. 84-91. This