Emarginula haweraensis is an extinct species of limpet, a marine mollusc in the family Fissurellidae. Fossils of the species date to between the Waipipian stage (3.70 million years ago) of the late Pliocene, and the Pleistocene Castlecliffian stage (1.63 million years ago) in New Zealand. The largest known species of Emarginula known from New Zealand, fossils of the species are widely distributed around the country.
In the original description, Powell described the species as follows:
The holotype of the species has a length of , a breadth of , and a height of . It is the largest known New Zealand species of Emarginula.
The species was first described by A. W. B. Powell in 1931. The holotype was collected in January 1927 by Powell from near the mouth of Waihi Stream, HÃÂwera, South Taranaki. It is held in the collections of Auckland War Memorial Museum.
This extinct marine species occurs between the late Pliocene Waipipian stage and Pleistocene Castlecliffian stage (3.70-1.63 million years ago) in New Zealand, including the Tangahoe Formation and Lower Kai Iwi Siltstone. Fossils are known to occur in the coast of South Taranaki and northwestern Whanganui District, including near HÃÂwera, Waverley and Kai Iwi, west of Kapiti Island, and the Cook Strait. Further fossils have been found in offshore marine locations including North Cape, the Bay of Plenty, Ranfurly Bank off the coast of East Cape, Mernoo Bank on the Chatham Rise and Doubtful Sound / Patea in Fiordland. Fossils have been found in marine strata in currently inland locations, including near the Manawatà «âÂÂWhanganui town Pahiatua and the Maungarake range in Carterton District near Gladstone.