Species Images
Henderson, West Auckland. 80mm
(websteri form) - From south of Auckland. 62mm
(delli form) - From a stream north of Auckland. 66mm
Key to Geographical Ranges
The symbols K.A.C.F.M.An. are used to indicate the geographical range of the species. They have been adopted to give an approxomation of the range of each species within New Zealand.
Kermadec Islands
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
Cookian - Lower North Island and the northern part of the South Island
Forsterian - Otago, Fiordland and Stewart Island
Moriorian - Chatham Islands, Pitt Island
Antipodean - Subantarctic Islands of New Zealand
FW =
L =
E =
I =

Echyridella aucklandica (Gray, 1843)

Classification:Mollusca (Phylum) > Bivalvia (Class) > Palaeoheterodonta (Subclass) > Unionoida (Order) > Hyrioidea (Superfamily) > Hyriidae (Family) > Echyridella (Genus)
Size/Grows to:Height 47mm, Length 96mm
Synonyms:(=Hyridella Swainson, =Cucumerunio Iredale)
(=delli McMichael & Hiscock, =lucasi Suter, =websteri Simpson)
Distribution:North Island. From Kaeo in the north, Auckland, Waikato to Wanganui and Lake Wairarapa. South Island, from Lake Manapouri to Lake Hauroko
Freshwater Mussel. Freshwater, Endemic
References and Publications:
  • Marshall, B.A., Fenwick, M.C., Ritchie, P.A. 2014: New Zealand Recent Hyriidae (Mollusca: Bivalvia: Unionida), Molluscan Research, 34(3) (p.193)
  • Fenwick, M.C., Marshall, B.A. 2006: A new species of Echyridella from New Zealand, and recognition of Echyridella lucasi (Suter, 1905) (Mollusca: Bivalvia: Hyriidae), Molluscan Research, 26(2) (p.73)
  • Crosby, D.D. Jan/1983: Lake Waahi - Cucumerunio websteri websteri (Simpson, 1902), Poirieria, 12(1) (p.12)
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.385)

Note: Localities are approximate, and represent only some of the known localities for the species.

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