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Taxonomy
Family:
CYLICHNIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Heterobranchia (Subclass)
> Euthyneura (Infraclass)
> Tectipleura (Subterclass)
> Cephalaspidea (Order)
> Cylichnoidea (Superfamily)
> Cylichnidae (Family)
> Cylichna (Genus)
> thetidis (Species)
Genus Synonyms:
=Bulla (Cylichna) Lovén, 1846
=Bullinella Newton, 1891
=Cylichna (Acrostemma) Cossmann, 1889
=Cylichna (Cylichnopsis) Cossmann, 1904
=Cylichnella (Bullinella) Newton, 1891
=Cylindrella Swainson, 1840
=Eocylichna Kuroda & Habe, 1952
Images: Cylichna thetidis Hedley, 1903
Parengarenga Harbour, Far North, NZ. 11mm
Holotype, collected in 40 metres, off Manning River, New South Wales, Australia (C.16488). Australian Museum, Sydney
Taxonomy
Family:
CYLICHNIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Heterobranchia (Subclass)
> Euthyneura (Infraclass)
> Tectipleura (Subterclass)
> Cephalaspidea (Order)
> Cylichnoidea (Superfamily)
> Cylichnidae (Family)
> Cylichna (Genus)
> thetidis (Species)
Genus Synonyms:
=Bulla (Cylichna) Lovén, 1846
=Bullinella Newton, 1891
=Cylichna (Acrostemma) Cossmann, 1889
=Cylichna (Cylichnopsis) Cossmann, 1904
=Cylichnella (Bullinella) Newton, 1891
=Cylindrella Swainson, 1840
=Eocylichna Kuroda & Habe, 1952
Details: Cylichna thetidis Hedley, 1903
Size/Grows to:
Height 11mm, Width 4mm
Distribution:
Northland to Bay of Plenty and occasional occurences as far south as Wellington. Also New South Wales, Australia
Geographical Range:
KA
Notes:
Marine, Shell narrow, elongate-cylindrical, white under a pale yellow periostracum. Columella thickened, with a single strong fold
Distribution Map
 
References and Publications
  • Morley, M.S., Hayward, B.W. 2015 Intertidal records of 'sea slugs' (nudibranchs and allied opisthobranch gastropods) from northern North Island, New Zealand, Records of the Auckland Institute and Museum, 50 (p.55)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.271)
  • Murdoch, R., Suter, H. 1906 Results of dredging on the continental shelf of New Zealand., Transactions of the New Zealand Institute, 38 (p.279)
  • Hedley, C. 1903 Scientific results of the trawling expedition of H.M.C.S. 'Thetis' off the coast of New South Wales, in February and March, 1896. Mollusca. Part II. Scaphopoda and Gastropoda., Memoirs of the Australian Museum, 4 (p.395) Original Description

*98 © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)

Key to Geographical Ranges
NZ Map showing 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 approximation of the range of each species within New Zealand.
K=
Kermadec Islands
A=
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
C=
Cookian - Lower North Island and the northern part of the South Island
F=
Forsterian - Otago, Fiordland and Stewart Island
M=
Moriorian - Chatham Islands, Pitt Island
An=
Antipodean - Subantarctic Islands of New Zealand
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
R =
Recent
Sf =
Subfossil
Fo =
Fossil