Shell outline oval, slightly narrowed anteriorly; anterior end markedly raised; posterior end slightly raised. All slopes straight to slightly concave. Sculpture of strong irregular, finely scabrous ribs; rib interspaces narrow. Foramen elongate oval. Posterior portion of foot projecting 'A shell length beyond shell, shell edge slightly enveloped by mantle folds. Propodial tentacles numerous, irregular. Maximum shell length 52 mm (East London Museum 11001). The description of the animal is based on four poorly preserved specimens from Baia de Santa Maria, Benguela Prov., Angola (MNHN uncat.), collected by S. Gofas, December, 1982

Medusafissurella chemnitzii differs from M. salebrosa and M. dubia in its larger size, more elongate foramen, less scabrous ribs, and in having red rather than brown or gray coloration.

Southwestern Africa: Pointe Noire, Congo, to Kunene River Mouth, Angola/Namibia border. Rocky intertidal to 2 m.