Parasitism is hard to demonstrate from the fossil record, but holes in the mandibles of several specimens of Tyrannosaurus may have been caused by Trichomonas-like parasites. Saurophthirus, the Early Cretaceous flea, parasitized pterosaurs.Ponomarenko, A.G. (1976) A new insect from the Cretaceous of Transbaikalia, a possible parasite of pterosaurians. Paleontological Journal 10(3):339-343 (English) / Paleontologicheskii Zhurnal 1976(3):102-106 (Russian) Eggs that belonged to nematode worms and probably protozoan cysts were found in the Late Triassic coprolite of phytosaur. This rare find in Thailand reveals more about the ecology of prehistoric parasites.
Parasitism is hard to demonstrate from the fossil record, but holes in the mandibles of several specimens of Tyrannosaurus may have been caused by Trichomonas-like parasites. Saurophthirus, the Early Cretaceous flea, parasitized pterosaurs.Ponomarenko, A.G. (1976) A new insect from the Cretaceous of Transbaikalia, a possible parasite of pterosaurians. Paleontological Journal 10(3):339-343 (English) / Paleontologicheskii Zhurnal 1976(3):102-106 (Russian) Eggs that belonged to nematode worms and probably protozoan cysts were found in the Late Triassic coprolite of phytosaur. This rare find in Thailand reveals more about the ecology of prehistoric parasites.