Welcome to Trilobite Tuesday! Pictured is Asaphus kowalewski. This 450-million-year-old species stands apart from other trilobites with its eyes perched atop 2-in- (5-cm-) long stalks. To some, Asaphus kowalewski may look like an animal from a distant galaxy!
@AMNH #globalmuseum #fossils #trilobites

Pictured is the Lower Cambrian Bristolia insolens—distinguished by the genal spines that emerge from its head. While specimens with disarticulated head shields are relatively common finds throughout the Western United States, complete examples are rare.
American Museum of Natural History
@AMNH #globalmuseum #fossils #trilobites