Chelodidae is an extinct of
polyplacophoran mollusc
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...
.
References
Prehistoric mollusc families
Chitons
{{paleo-mollusc-stub