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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 - Ptenoglossa - Family: Cerithiopsidae



Genus: Alipta

Alipta crenistria (Suter, 1907)
Height 12mm, Width 3.5mm
Three Kings Islands, Far North, east coast of North and South Islands, Chatham Islands, and Stewart Island [ACFMAnE.]

Genus: Aliptina

Aliptina acheronae Marshall, 1978
Height 1.6mm, Width 0.5mm
Off Three Kings Islands, 252-805 metres [AE.]

Genus: Cerithiopsidella

Cerithiopsidella blacki Marshall, 1978
Height 4.9mm, Width 1.2mm
Off Three Kings Islands, 622-805 metres [AE.]

Genus: Cerithiopsis

Cerithiopsis powelli Marshall, 1978
Three Kings Islands to Mahia and East Cape, 0-102 metres [K.ACE.]

Genus: Horologica

Horologica cowei Marshall, 1978
Height 3mm, Width 1mm
Three Kings Islands, Northland, to Bay of Plenty, 29-102 metres [AE.]
Horologica diremptus (Odhner, 1924) (=paradoxa Powell)
Height 3mm, Width 1.2mm
Northland east coast [AE.]

Genus: Joculator

Joculator sublima Marshall, 1978
Height 2.5mm, Width 1.1mm
Off Three Kings Islands, 102-805 metres [AE.]

Genus: Mendax

Mendax hebetatus Marshall, 1978
Height 5.95mm
Off Three Kings Islands, 91-805 metres [AE.]
Mendax marginata (Suter, 1908)
Height 2.7mm
Three Kings Islands, North Island to East Cape, Snares Islands [AAnE.]
Mendax seilaformis Marshall, 1978
Height 3.25mm, Width 1.25mm
Off Three Kings Islands, 102 metres [AE.]
Mendax subapicina (Dell, 1956)
Height 4.4mm, Width 1.2mm
Off Kaikoura to Otago, and Chatham Islands [FME.]
Mendax trizonalis (Odhner, 1924)
Height 4mm, Width 1.1mm
Northland. Colville Channel, 65 metres [AE.]
Height 3mm
South Island and Snares Island [FAnE.]
Mendax trizonaloides Marshall, 1978
Height 3.5mm, Width 1.2mm
Off Three Kings Islands and Mayor Island, Bay of Plenty, 102-805 metres [AE.]

Genus: Prolixodens

Prolixodens benthica Marshall, 1978
Height 3.2mm, Width 1.1mm
Off Three Kings Islands, 102-805 metres [AE.]
Prolixodens crassa Marshall, 1978
Height 5.2mm, Width 1.5mm
Three Kings Islands and north-east coast of North Island to Poor Knights Islands, 40-622 metres [AE.]
Prolixodens infracolor (Laseron, 1951)
Height 4.5mm, Width 1.4mm
Northland east coast to Mahia, and west coast New Plymouth to Cook Strait [AC]

Genus: Retilaskeya

Retilaskeya zelandica Marshall, 1978
Height 15.8mm
Three Kings Islands, east coast of North and South Islands, Cook Strait, Foveaux Strait, Stewart and Auckland Islands. In shell sand [ACFAnE.]

Genus: Retilaskeya (Marshallaskeya)

Height 8mm, Width 1.5mm
North Island, Three Kings to East Cape [AE.]

Genus: Seila (Hebeseila)

Height 13mm
Otago to Stewart Island, off Chatham, Auckland, Campbell and Snares Islands [FMAnE.]
Seila (Hebeseila) regia Marshall, 1978
Height 17mm, Width 3.4mm
Off Three Kings Islands, 88-805 metres [AE.]

Genus: Seila (Lyroseila)

Seila (Lyroseila) cincta (Hutton, 1866) (=chathamensis Suter)
Length 11mm, Width 3.5mm
North, South, Stewart and Chatham Islands [ACME.]
Height 4.4, Width 1.5mm
Off Three Kings Islands, Bay of Islands, and off Mayor Island, 81-805 metres [AE.]
Seila (Lyroseila) maoria Marshall, 1978
Height 7mm, Width 2.5mm
North Island. North-east coast from Poor Knights Islands to Whale Island. In shell sand to 37 metres [AE.]

Genus: Seila (Notoseila)

Height 11.6mm, Width 2.1mm
Bay of Islands and off Mayor Island, Bay of Plenty, 29-73 metres [AE.]
Height 12mm, Width 3mm
North, South, Stewart Island [ACFAnE.]

Genus: Socienna

Socienna cracens Marshall, 1979
Height 10.7mm, Width 3mm
North Island [ACE.]
Socienna cracens regia Marshall, 1979
Height 7.5mm, Width 1.5mm
North Island. Off Three Kings Islands [AE.]

Genus: Specula

Specula campbellica (Powell, 1955)
Height 2.5mm, Diameter 1.15mm
Campbell Islands [AnE.]
Specula retifera (Suter, 1908)
Height 3.0mm, Diameter 1.0mm
South Island, off Taiaroa Head, Otago. Stewart, Snares and Bounty Islands [FAnE.]
Specula styliformis (Suter, 1908) (=dissimilis Suter)
Height 3.5mm
Three Kings Islands to South Island, Snares, Bounty, Auckland and Campbell Islands, 15-805 metres [ACFAnE.]

Genus: Sundaya

Sundaya exquisita Oliver, 1915
Kermadec Islands [K.E.]
Sundaya tuberculata Powell, 1927
Height 2.2mm, Diameter 0.9mm
Off Three Kings Islands, north-east coast of North Island to East Cape, southern Fiordland, Stewart Island, and Pukaki Rise, in shell sand to 805 metres [K.AFE.]

Genus: Synthopsis

Synthopsis acuminata Marshall, 1978
Height 3.6mm, Diameter 0.95mm
Three Kings Islands, Northland to Cook Strait [ACE.]
Synthopsis caelata (Powell, 1930)
Height 3mm, Diameter 0.95mm
North Island. Three Kings Islands, Northland to Cook Strait [ACE.]
Synthopsis regia Marshall, 1978
Height 2.5mm
Off Three Kings Islands, 91-805 metres, and Ranfurly Bank, East Cape [AE.]

Genus: Tasmalira

Tasmalira vitrea (Suter, 1908)
Height 4mm, Width 1.8mm
Southern North Island and South Island [CFE.]

Genus: Zaclys

Zaclys murdochi Marshall, 1978
Height 6mm, Width 2mm
North, South and Stewart Island. Also recently recorded from the Chatham Islands [ACFME.]
Zaclys sarissa (Murdoch, 1905) (=acies Suter, =subantarctica Suter)
Height 8mm, Width 2.5mm
North, South Island, Snares, Bounty, Auckland and Antipodes Islands [AFAnE.]