Publication Hutton (1880): summary

Hutton, F.W. 1880. Manual of the New Zealand Mollusca: A Systematic and Descriptive Catalogue of the Marine and Land Shells, and of the Soft Mollusks and Polyzoa of New Zealand and the Adjacent Islands. 224 pp. https://www.biodiversitylibrary.org/page/13296852.

Unio zelebori ‘Dunker’ of Authors = Echyridella menziesii

‘Dunker’ of Authors.
Hutton, 1880. Manual New Zealand Mollusca: 161.
McMichael & Hiscock, 1958. Austral. J. Mar. Frwtr. Res. 9(3): 460, pl. 14, figs. 10-11.
(misidentified reference to Unio zelebori Dunker, 1866)