AMNH Trilobite Exhibit

In June of 2014, the American Museum of Natural History opened its trilobite exhibit, Life In The Ancient Oceans, in the Grand Gallery on the Museum’s first floor 77th Street lobby, near the famed Great Canoe.

This display includes some of the oldest fossils on exhibit in the museum. Called trilobites, some of these extinct marine arthropods are more than 500 million years old. (Just as one comparison, the famed Tyrannosaurus rex dinosaurs lived from about 85 to 65 million years ago.)Trilobites first evolved about 520 million years ago, during the Cambrian Period, when the planet was mostly covered by water. “The world looked very different then,” notes Neil Landman, curator in the Division of Paleontology, “and there were stretches of ocean that no longer exist.”Cambrian trilobites shared the shallow seas with jellyfish and primitive mollusks such as snails and clams, along with annelid worms and sponges. “There were no vertebrates, of course,” says Landman, “nor, at that time, was there life on land.”Over time, plate tectonics have completely shifted the planet’s topography. Trilobite fossils have been uncovered in locations ranging from the top of the Himalayan Mountains to the areas surrounding California’s Death Valley, with more than 25,000 trilobite species identified so far.The exhibit includes 15 fossils of trilobite species from the Museum’s collections. The fossils on display are so exquisitely preserved that the animals seem almost alive, crawling along the sea floor, not unlike the way horseshoe crabs do today.Trilobites’ shells were made of the mineral calcite, like clam or crab shells. They were also the earliest known life forms with compound eyes—eyes with multiple lenses. Some trilobites had eyes on stalks, perhaps for peering above the sediment in the waters where they lived.Trilobites became extinct 225 million years ago. In all, trilobite species inhabited Earth for about 300 million years.

A much more extensive display, featuring spectacular trilobite specimens, ammonites and other marine fauna, is being planned for a future Paleozoic Oceans Exhibit.

The current exhibition was made possible thanks to Martin Shugar, M.D., and Andy Secher.