This species is quite variable and has been divided into several species and subspecies by hobbyists, but only 3 subspecies are valid. ...Read More />
The Subspecies 'curvispinus' has radial spines that curve backwards strongly, about an inch long.
The Subspecies 'caesius' has radial spines that are practically straight and an inch or more longer.
The subspecies 'dawsonii' is native only to Jalisco, Mexico.
This species is quite variable and has been divided into several species and subspecies by hobbyists, but only 3 subspecies are valid.
...Read More