Anisochaeta gigantea
Anisochaeta gigantea (formerly "Spenceriella gigantea" or "Celeriella gigantea"), commonly called the North Auckland worm, is a rare giant annelid of the family Megascolecidae, endemic to New Zealand. The North Auckland worm is New Zealand's largest, reaching long, and in diameter. Its burrows are up to in diameter, and reach a depth of . The type locality is on Little Barrier Island on a plateau above sea level in forest subsoil. Under both the New Zealand Threat Classification System and IUCN Redlist it is classed a "Data Deficient".