Pseudopentaceros is a genus of extinct fish that lived during the Cretaceous period. These fish are known for their unique body structure, which features a distinctive arrangement of fins and scales. Fossils of Pseudopentaceros have been found in various locations, providing insights into the diversity of marine life during this era. The genus is part of a larger group of fish known as actinopterygians, which are characterized by their bony skeletons and ray-finned structures. Pseudopentaceros contributes to our understanding of evolutionary adaptations in ancient aquatic environments, highlighting the complexity of prehistoric ecosystems.