Work found, with species-group names introduced therein:
Marcus, E. [d. B.-R.] and E. Marcus. 1957a. Sea-hares and side-gilled slugs from Brazil. Boletim do Instituto Oceanográfico 6 3-49, 8 pls. [Stated date: -- --- 1955; true date: -- --- 1957.] Pleurobranchaea hamva, see Pleurobranchaea inconspicua Bergh, 1897