Fenwick, M.C. & B.A. Marshall. 2006. A new species of Echyridella from New Zealand, and recognition of Echyridella lucasi (Suter, 1905) (Mollusca: Bivalvia: Hyriidae). Molluscan Research 26(2): 69-76. Available electronically.
Fenwick & Marshall, 2006. Mollusc. Res. 26(2): 70, figs. 1A-D, 2A, 4.
+ Diplodon (Hyridella) lutulentus Suter, 1913
+ Unio waikarensis Colenso, 1845
+ Unio lutulentus Gould, 1850
+ Unio hochstetteri Dunker, 1862
+ Unio depauperata Hutton, 1882
+ Unio rugatus Hutton, 1882
+ Diplodon (Hyridella) menziesi acuta Suter, 1907
+ Diplodon (Hyridella) lutulentus Suter, 1913