Eatoniella mortoni

In the original description, Ponder described the species as follows: E. mortoni measures by . It can be identified due to its moderately large, D-shaped aperture, ovate-conical, smooth shell with a spire slightly taller than aperture, and by its colour, which varies between purple-tinted dark grey to pale yellowish-grey. ==Taxonomy==

The species was first described by Winston Ponder in 1965, who named it Eatoniella (Dardanula) mortoni. Ponder named the species after New Zealand biologist John Morton, who had assisted Ponder during his early investigations into the species. The holotype of the species was collected by Ponder himself on 11 December 1961, from the south side of Days Bay in Lower Hutt. It is held by the Auckland War Memorial Museum. ==Distribution and habitat==

''. The species is endemic to New Zealand, In addition, the species can be found on the Chatham Islands Typically the species can be found on algae at low tide, and often lives on kelp species such as Ecklonia radiata. ==Ocean acidification studies==

Eatoniella mortoni has been used as a species to study ocean acidification, as the species benefits from living in carbon dioxide-rich environments and remains localised, especially specimens sourced from the volcanic island Whakaari / White Island, due to their lifetime exposure to carbon dioxide vents. Eatoniella mortoni can produce more crystalline, durable and less porous shells at natural carbon dioxide vents. ==Gallery==

Eatoniella mortoni 01.jpg|Different angle views of an E. mortoni specimen found in Abel Tasman National Park Eatoniella mortoni NMR993000100277A.jpg|E. mortoni specimen from Karehana Bay, Wellington Region ==References==