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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. © rights reserved
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:
Eastern Australia and New Zealand. Middlesex Bank, North Island and Antipodes Islands, from 0-246m
Type Data:
  • Off Manning River, New South Wales, Australia, (holotype)
Notes:
Marine, Native - Non-endemic, 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

NZ Geographical Regions
Key to symbols used in Checklist.
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
R =
Recent
Sf =
Subfossil
Fo =
Fossil
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