Ancient Predator with Three Eyes and Spiny Claws Unearthed in Burgess Shale
A fascinating predator that roamed the oceans of Earth over 500 million years ago has been discovered in the renowned Burgess Shale fossil site. Named Mosura fentoni, this unique creature possessed three eyes, spiny claws for grasping prey, a circular tooth-lined mouth for feeding, and flippers along its body for swimming. With 26 body segments, Mosura stands out as a distinct member of the extinct radiodont group.
Although Mosura was relatively small, approximately the size of a human finger, its segmented tail end has intrigued paleontologists Joe Moysiuk and Jean-Bernard Caron. The duo meticulously studied 61 fossilized specimens of this ancient predator to unravel its enigmatic features.
Mosura was aptly named for its moth-like appearance, although its connection to actual moths is distant. The creature’s 16 tightly packed segments with gills at the rear end demonstrate an evolutionary convergence with modern arthropods, such as horseshoe crabs and insects.
The Cambrian period, when Mosura thrived, marked an explosion of life in Earth’s oceans. The Burgess Shale Lagerstätte, formed around 508 million years ago, provides a window into this ancient marine ecosystem, preserving intricate details of organisms from that time.
One of the most intriguing aspects of Mosura is its circulatory system, which lacked veins and functioned similarly to modern arthropods. The presence of lacunae, cavities that circulated hemolymph within the body, provided valuable insights into the creature’s physiology.
Moysiuk and Caron’s research on Mosura sheds light on the early adaptations of arthropods and the diversity within the radiodont group. The study, published in Royal Society Open Science, underscores the remarkable evolutionary strategies adopted by ancient marine predators to thrive in their environments.
