Apalone spinifera - BioKIDS - University of Michigan View source BioKIDS Critter Catalog BioKIDS Critter Catalog BioKIDS Critter Catalog View source View source BioKIDS Critter Catalog BioKIDS Critter Catalog BioKIDS Critter Catalog Apalone spinifera - BioKIDS - University of Michigan View source Apalone spinifera - BioKIDS - University of Michigan Apalone spinifera - BioKIDS - University of Michigan