Fort Worth, Texas | Fort Worth | Fort Wayne, Indiana | Fort Sill | Fort Bliss | Fort Leavenworth | Fort Bragg | Fort Benning | Fort William | Fort Lauderdale, Florida | fort | Fort Smith, Arkansas | Fort Bragg (North Carolina) | Red Fort | Fort Sumter | Fort Lee, New Jersey | Fort Knox | Fort Wayne | Fort Monroe | Fort Drum | Fort Stockton, Texas | Fort Smith | Fort Sam Houston | Fort Myers, Florida | Fort Worth Star-Telegram | Fort Vancouver | Fort McMurray | Fort Hood | Fort Stockton | Fort Lauderdale |
The genus Spondylus originated in the Mesozoic era and can be found it fossil forms can be found in Cretaceous rocks in the Fort Worth Formation of Texas and in the Trent River Formation of Vancouver, as well as other parts of North America.