Anatomical features unique to this phylum include the mantle and a tongue-like structure known as the radula.
Hypotheses regarding the phylogeny of this phylum include the Testaria hypothesis and the Aculifera hypothesis, and the classification of Wiwaxia and Kimberella as part of this phylum is controversial. One  class belonging to this phylum is the extinct Helcionelloida, and extant classes include Aplacophora and Scaphopoda. Some members of this phylum use (*) love darts during courtship. Anatomical features unique to this phylum include the mantle and a tongue-like structure known as the radula. This phylum includes the largest animal without a backbone, the giant squid, as well as other cephalopods. FTP, name this phylum which also includes bivalves and gastropods.
Hypotheses regarding the phylogeny of this phylum include the Testaria hypothesis and the Aculifera hypothesis, and the classification of Wiwaxia and Kimberella as part of this phylum is controversial.
{Mollusca} [or {molluscs}]