Thylacodes aotearoicus Morton, 1951 Marine, Endemic, Darker colour than Thylacodes zelandicus North Island AE.
Thylacodes zelandicus (Quoy & Gaimard, 1834) Diameter 10mm Marine, Endemic North and South Islands, often on Atrina shells AE.
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 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