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Taxonomy
Family:
PLEUROBRANCHIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Heterobranchia (Subclass)
> Euthyneura (Infraclass)
> Ringipleura (Subterclass)
> Nudipleura (Superorder)
> Pleurobranchida (Order)
> Pleurobranchoidea (Superfamily)
> Pleurobranchidae (Family)
> Berthella (Genus)
> medietas (Species)
Genus Synonyms:
=Berthellinops Burn, 1962
=Bouvieria Vayssière, 1897
=Cleanthus Leach, 1847
=Gymnotoplax Pilsbry, 1896
=Pleurobranchus (Bouvieria) Vayssière, 1897
Images: Berthella medietas Burn, 1962
Low tide under rock, Henderson Bay, Far North, NZ. 25-30mm
Under a rock at low tide, Henderson Bay, Far North, NZ. 20-30mm (animal)
Taxonomy
Family:
PLEUROBRANCHIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Heterobranchia (Subclass)
> Euthyneura (Infraclass)
> Ringipleura (Subterclass)
> Nudipleura (Superorder)
> Pleurobranchida (Order)
> Pleurobranchoidea (Superfamily)
> Pleurobranchidae (Family)
> Berthella (Genus)
> medietas (Species)
Genus Synonyms:
=Berthellinops Burn, 1962
=Bouvieria Vayssière, 1897
=Cleanthus Leach, 1847
=Gymnotoplax Pilsbry, 1896
=Pleurobranchus (Bouvieria) Vayssière, 1897
Details: Berthella medietas Burn, 1962
Size/Grows to:
Length 14mm, Animal 35mm
Distribution:
Northland east coast and Chatham Islands. Also Mediterranean, Azores and western Atlantic
Geographical Range:
ACFMAn
Notes:
Marine
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.64)
  • Willan, R.C. 1983 New Zealand side-gilled sea slugs (Opisthobranchia: Notaspidea: Pleurobranchidae), Malacologia, 23(2) (p.243)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.282)

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
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