Echinoid 7
US$14.95
- Species: Macraster Texanus, Roemer
- Size Diameter: 3.25 inches, (8.255 centimeters)
- Weight: 1.056 pounds (479 grams)
- Collecting Site: Rock Creek
- Locality: Tarrant County, Fort Worth, Texas
- Formation: Washita Group, Fort Worth Formation
- Age: 100 Million Years old