Abstract
Stephan's doctoral dissertation (1779) often appears in bibliographies but it does not seem to have been examined in the last 200 years. Ten names are available from it. Six are junior homonyms and three are junior subjective synonyms and do not present major nomenclatural problems. Raia sloani Stephan, 1779 is a potential senior synonym of Raja ajereba Walbaum, 1795. Both names are based on several species. A common lectotype is designated and Raja ajereba is declared nomen protectum and R. sloani is declared nomen oblitum.
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