This lizard is said to have been named for the hoplites, the name for the heavily armored infantry of ancient Greece. It is also said that it is called, shield-carrier lizard from the Greek hoplites, armed foot-soldier, shield [hoplon] carrier.
Other sources say that the fossils name means shield-carrier lizard based on the Greek hoplites, shield (hoplon) carrier. It was found in South Dakota in 1901 and named in 1902 by Frederic Augustus Lucas (1852-1929).
-sauria, -saurian + (page 16)