Publication R.I. Johnson (1974): summary

Johnson, R.I. 1974. Lea's unionid types or recent and fossil taxa of Unionacea and Mutelacea introduced by Isaac Lea, including the location of all the extant types. Special Occasional Publications of the MCZ (2). 159 pp. https://www.biodiversitylibrary.org/page/4321834.

Unio afferulus R.I. Johnson, 1974 = Nyassunio nyassaensis

‘Lea’ R.I. Johnson, 1974. Spec. Occ. Publ. (2): 11.
(error for Unio aferula Lea, 1864)