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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.
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
E =
Endemic
I =
Introduced
Bivalvia - Anomalodesmata - Pholadomyoida - Family: Thraciidae

Thraciidae

 

Genus: Asthenothaerus

 
Asthenothaerus maxwelli Marshall, 2002
Length 46mm
North, South, Stewart, Auckland, Antipodes, Bounty and Chatham Islands and Chatham Rise, 0-293 metres [ACFMAnE.]

Genus: Barythaerus

 
Barythaerus biconvexus (Powell, 1927)
Width 2.9mm, Height 2mm
Off Soutb West Otago from 180 metres [FE.]
 
Barythaerus cuneatus (Powell, 1937)
Width 5.5mm, Height 3.7mm
Off Three Kings Islands, trawled in 170 metres [AE.]
 

Genus: Parvithracia

 
Parvithracia ampla Marshall, 2002
Width 3mm, Height 2.5mm
Off Three Kings Islands, North, South Islands and Chatham Rise. Trawled around 35-1000 metres [ACFME.]
 
Parvithracia suteri (Finlay, 1927)
Width 5mm, Height 4.8mm
Off Three Kings Islands, North and South Island. Trawled in around 140-475 metres [ACFE.]
 

Genus: Parvithracia (Pseudasthenothaerus)

 
Length 7.9mm
Off north-western and south-eastern South Island, 421-1386 metres [CFE.]
 
Length 11.5mm
Off Three Kings Islands, 88-805 metres. Also off Norfolk Island [A]
 

Genus: Thracia

 
Thracia vegrandis Marshall & Murdoch, 1919
Width 25mm, Height 17mm
North Island and northern part of South Island. Dredged from around 10 to over 50 metres [ACE.]
 

Genus: Thracia (Crassithracia)

 
CurcumAntarctic, Southern NZ [F]
 

Genus: Thracia (Odontocineta)

 
Width 25mm, Height 17mm
North, South and Stewart Island. Dredged around 15-140 metres [ACFE.]
 

Genus: Trigonothracia

 
Trigonothracia mimica Marshall, 2002
Width 4mm, Height 4mm
North Island, South Island, Fiordland, and Chatham Islands [ACFM]