185, 1946. trionyx muticus Anderson, Copeia, 3:211, August 28, 1958. Holotype.
"Description of a New Softshell Turtle From the Southeastern United States"
Robert G. Webb
Among the last are crocodiles and tortoises of the genera Emys and trionyx.
"The Student's Elements of Geology"
Sir Charles Lyell
The Pterodactyl also, a flying reptile, is met with in the same strata, and many remains of Chelonians of the genera trionyx and Emys, now confined to tropical regions.
"The Student's Elements of Geology"
Sir Charles Lyell