Pneumoderma atlanticum (Oken, 1815) boasi (Pelseneer, 1887)
Body oval, semi-transparent, skin usually pigmented. Wings small, posterior footlobe long. Two lateral arms, each with 40 suckers. Lateral gill short, with fringes, lateral somatic crests also fringed. Posterior gill with short radiating crests with fringes, but not subdivided. Hook sacs rather short. Body length: 7 mm.