User:Abyssal/Prehistory of South America/DYK/5

• ... that highlights from 19th century ichnology include the discovery of protomammal tracks in England, dinosaur footprints in Massachusetts, and the mysterious hand-shaped Chirotherium tracks (pictured)?

• ... that the extinct Argentinian bivalve Cuyopsis symmetricus was named for the symmetry of its rectangular shells?

• ... that the extinct horsetail Equisetum thermale grew in Jurassic hot springs?

• ... that the royal dynasty at the Maya city of Copán (fragment pictured) in Honduras was founded by a warrior sent from the distant city of Tikal?

• ... that four-eyed harvestmen known as Tetrophthalmi once roamed the Earth?