Sphaerosyllis georgeharrisoni is a species belonging to the phylum Annelida, a group known as the segmented worms.
Sphaerosyllis pygipapillata has all of its antennae aligned, a smooth dorsum, while its pygidial papillae are longer and slender.
It possesses small papillae that cover its dorsum, extending to its palps and parapodia, being quite numerous on its midbody.
Posterior parapodia, on the other hand, possess 3 compound chaetae with larger shafts and shorter blades which are slightly hooked.
[1] The pharynx spans approximately 3 segments and is relatively slender, its pharyngeal tooth located anteriorly.