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Pretty similar are: Phyllidia varicosa which also has a median black line on the foot sole. It differs by having possess notal ridges and compound tubercles, which are blue-grey. Phyllidia tula which also has a median black line on the foot sole. It is more tuberculate with a graduated series of tubercles which decreases in size from very large in the centre to tiny and closely packed at the margin. Phyllidia madangensis differs by having no alternating smaller tubercles, its larger tubercles are sparsely scattered, and it lacks markings on the foot sole. Unique is a small tubercle immediately in front of each rhinophoral pocket. More informations on Phyllidia carlsonhoffi are at Bill Rudman's Sea-Slug Forum! |
