This 50-Million-Year-Old Fish Has Had Scientists Stumped For 200 Years - IFLScience

1. This 50-Million-Year-Old Fish Has Had Scientists Stumped For 200 Years  IFLScience
2. Despite new clues, this ancient fish has stumped scientists for centuries  Science News Magazine
3. Mysterious 50-million-year-old fish to get a new genus  Phys.org