Marshall, B.A., M.C. Fenwick & P.A. Ritchie. 2014. New Zealand Recent Hyriidae (Mollusca: Bivalvia: Unionida). Molluscan Research 34(3): 181-200. Available electronically.
(click the figure number to see the cladogram)
+----- Cumberlandia_monodonta
+-----------+
| | +-- Pyganodon_grandis
| +--+
| +-- Unio_pictorum
--+
| +-------------- Amblema_plicata
| |
| | +----- Echyridella_aucklandica
| | +-----+
+--+ | | +-- Echyridella_menziesii
| | +--+
| | +-- Echyridella_onekaka
| |
+--+ +----- Velesunio_ambiguus
| +--+
| | | +-- Velesunio
| | +--+
| | +-- Lortiella
+--+
| +-- Cucumerunio_novaehollandiae
| +--+
| | +-- Hyridella_australis
+--+
| +-- Diplodon_chilensis
+--+
+-- Diplodon_gratus