It has an identifiable head with four eyes, two sensory feelers or palps, and many tentacles.
The holotype specimen is a complete adult female with an overall coloration that is brown to black, except the palpi, which are a dull brick red.
Initial first-instar nymphs are dark brown, with white or brownish white tips of the maxillary and labial palps.
The prostomium generally has one or two pairs of eyes, a dorsal pair of antennae, a ventral pair of sensory palps and a pair of organs on the neck.
Each side of the mouth of the bivalve has an inner and an outer appendage called a palp.