The two pet rodents that are referenced in the crossword solutions are gerbils and hamsters. Gerbils are small, burrowing rodents that are native to the deserts of Africa and Asia. They are popular pets due to their friendly nature and low maintenance requirements. Hamsters are also small rodents, but they are native to Europe and parts of Asia. They are known for their cheek pouches, which they use to store food. Both gerbils and hamsters make great pets, as they are relatively easy to care for and can provide hours of entertainment.