Quick Search
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 =
N =
North Island
S =
South Island
E =
I =
Gastropoda - Caenogastropoda - Heterobranchia - Family: Architectonicidae



Genus: Adelphotechtonica

Width 13mm, Proxumbilical rib absent
Known from disjunct localities in southern Africa, New Caledonia, New Zealand and the Midway Islands. Sublittoral to upper bathyal (depth records between 74 and 430 m), live records from 100-115 m [A]
Adelphotechtonica reevei (Hanley, 1862)
Height 18mm, Width 25mm
Northland to Bay of Plenty. Also Kermadec Islands and New South Wales, Australia [K.A]

Genus: Architectonica

Architectonica maxima (Philippi, 1849)
Kermadec Islands [K.]

Genus: Granosolarium

Granosolarium asperum (Hinds, 1844) (=illustris Iredale)
Height 4mm, Width 8.5mm
Northland to Bay of Plenty. Also New South Wales, Australia [A]
Kermadec Islands [K.]

Genus: Heliacus

Heliacus areola (Gmelin, 1791)
Northland [A]
Heliacus variegatus (Gmelin, 1791)
Width 6-21mm
Northland, also Norfolk Islands [A]

Genus: Heliacus (Gyriscus)

Height 8mm, Width 7.5mm
Kermadec Islands, Wanganella Bank. Between Cape Maria van Diemen and Three Kings Islands [K.A]

Genus: Heliacus (Torinista)

Heliacus (Torinista) caelatus (Hinds, 1844) (=costatus Garrard not Schepman)
Northland [A]
Length 9mm
Philippines to Australia and New Zealand. Northland [A]
Three Kings Islands, Northland to East Cape [A]
Heliacus (Torinista) implexus (Mighels, 1845) (=maorianus Powell)
Height 6.5mm, Width 11.8mm
Off Northland east coast. Also Norfolk and Kermadec Islands [K.A]

Genus: Philippia

Philippia lutea (Lamarck, 1822)
Height 13mm, Width 12mm
Northland to Bay of Plenty and Mahia. Recently also recorded just north of Castlepoint [AC]

Genus: Pseudomalaxis

Pseudomalaxis zanclaeus meridionalis (Hedley, 1903) (=bollonsi Mestayer)
Height 5mm, Width 16mm
North Island. Off North Cape to Bay of Plenty [A]

Genus: Pseudotorinia

Pseudotorinia amoena (Murdoch & Suter, 1906)
Height 2mm, Width 5.5mm
Off Northland east coast to Bay of Plenty, 30-200 metres [AC]

Genus: Psilaxis

Psilaxis oxytropis (A.Adams, 1855)
Height 8mm, Width 10mm, Larger protoconch than Psilaxis radiatus
Northland east coast to East Cape. Also central and western Pacific, New Caledonia [K.A]
Psilaxis radiatus (Röding, 1798)
Height 16mm, Width 14mm
Northland east coast. Also indp-Pacific from South Africa and the Red Sea to Hawaii and Marquesas [A]

Genus: Solatisonax

Solatisonax injussa Iredale, 1931
Kermadec Islands [K.]
Kermadec Islands [K.]

Genus: Spirolaxis

Spirolaxis argonauta Bieler, 1993
Kermadec Islands [K.]
Kermadec Islands [K.]
Spirolaxis rotulacatharinea (Melvill & Standen, 1903) (=Pseudomalaxis thetidis Garrard)
Length 4.4mm
Gulf of Oman, SE Rep. South Africa to Hawaii and Kermadec Islands [K.]