Pseudophyllidea

The Pseudophyllidea are an order of tapeworms within the class Cestoda. These parasitic flatworms are characterized by a scolex (head) that features two elongated, shallow bothria (suckers), one dorsal and one ventral. Their life cycle involves teleost fish and land vertebrates as hosts, and this order includes some of the largest tapeworms known, with Polygonoporus giganticus reaching up to 30 meters in length. Tapeworms, in general, are internal parasites affecting various animals, including humans, and lack a digestive tract, absorbing nutrients through their body covering. The disease caused by tapeworms is known as cestodiasis.123