Platyhelminthes vs Nematoda Platyhelminthes and Nematoda are two major invertebrate phyla in the Kingdom Animalia that show some difference between them in terms of their morphology. Invertebrates are the animals who lack backbone. The other major invertebrate phyla include Porifera, Cnidaria, Annelida, Arthropoda, Mollusca, and Echinodermata. Platyhelminthes and nematodes are non-coelomates and have very […]