Dogs can become infected with several different species of tapeworm. As a Class the tapeworms are known as "Cestoda". Generally classification doesn't get much beyond this but the sub-class Eucestoda, Order Cyclophyllidea, Family Taeniidaecontains the genus Echinococcus which contains a number of relevent species. Cestota--> Eucestoda--> Cyclophyllidea--> Mesocestoididae have also been found.