Macrophiothrix oliveri (Benham, 1911)
This is not a Mollusc. Other non-Molluscan Phyla (Echinodermata, Brachiopoda etc) have been included to help identify species that may be mistaken for Mollusca, but actually are not.
Echinodermata (Phylum) > Asterozoa (Subphylum) > Ophiuroidea (Class)
> Myophiuroidea (Subclass)
> Amphilepidida (Order)
> Ophiactoidea (Superfamily)
> Ophiotrichidae (Family)
> Macrophiothrix (Genus)