User:Abyssal/Prehistory of North America/DYK/31

... that many of the pre-Columbian Etowah plates found at Etowah Indian Mounds in Georgia were thought to have been made at Cahokia in western Illinois?
... that of the 17 confirmed Olmec colossal heads of Mexico (example pictured), the largest is estimated to weigh 40 tons?
... that Mississippi's Spanish Fort is neither Spanish nor a fort?
...that Fossil Cycad National Monument, established in South Dakota in 1922, was withdrawn as a national monument in 1956 because all of the visible fossils had been stolen?
... that the extinct rose family member Neviusia dunthornei is one of only three known Neviusia species?

... that the primary leaf veins for the extinct plant Trochodendron nastae are palmate rather than being pinnate like those in the living Trochodendron aralioides?
... that amber fossils of ants carrying the extinct mealybug genus Electromyrmococcus represent the oldest record of symbiosis between mealybugs and Acropyga ants?
... that the extinct Eocene maples Acer hillsi and Acer stewarti are distinguished by how inflated the nut is?
... that the extinct Eocene butterfly Prodryas persephone (pictured) from the Florissant Fossil Beds is the best preserved fossil lepidopteran discovered to date?
... that the first described fossil of Anochetus dubius is surrounded by a brownish bacterial growth?