Definition of "aplacophoran" [aplacophoran]

• One of the aplacophora; a deep-water wormlike mollusk lacking calcareous plates on the body but having fine limy spicules on the covering mantle. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "Some authors propose the clade to represent the most basal branch within Mollusca, while others claim aplacophoran mollusks (Solenogastres and Caudofoveata) to be derived."
• "The phylogenetic status of the aplacophoran mollusk taxon Solenogastres (Neomeniomorpha) is controversially discussed."