Arthritica bifurca (Webster, 1908) Width 6mm, Height 5mm Marine, Recent, Fossil, Endemic North and upper South Island ACR.Fo.E. |
Arthritica crassiformis Powell, 1933 Width 5.5mm, Height 4.5mm Marine, Endemic, Commensal upon the pholad, rock boring Anchomasa, usually found around the base of the siphon and along the lower mantle edges North Island and northern part of South Island ACE. |
Arthritica hulmei Ponder, 1965 Width 3.4mm, Height 2.8mm Marine, Endemic, Commensal with a large polychaete worm, the seamouse, Aphrodita australis Northland to Wellington, Cook Strait area ACE. |