''Introvertocystis'' is an extinct genus of

acritarch Acritarchs are organic microfossils, known from approximately 1800 million years ago to the present. The classification is a catch all term used to refer to any organic microfossils that cannot be assigned to other groups. Their diversity refl ...

s. ''Introvertocystis rangiaotea'' is from the Late Cretaceous (Cenomanian–Turonian)

Tupuangi Formation The Tupuangi Formation is a geological formation in New Zealand, only exposed on Pitt Island in the Chatham Islands. It is the oldest exposed sedimentary unit within the archipelago. It was deposited in terrestrial deltaic to paralic condit ...

of the

Chatham Islands The Chatham Islands ( ) ( Moriori: ''Rēkohu'', 'Misty Sun'; mi, Wharekauri) are an archipelago in the Pacific Ocean about east of New Zealand's South Island. They are administered as part of New Zealand. The archipelago consists of about t ...

, New Zealand.Mays, C.M.; Stilwell, J.D. 2012: Judging an acritarch by its cover: the taxonomic implications of Introvertocystis rangiaotea gen. et sp. nov. from the Late Cretaceous (Cenomanian–Turonian) of the Chatham Islands, New Zealand. Palynology, 36(2), pages 180-190,

References

* John O. Corliss (1984). The kingdom Protista and its 45 phyla, BioSystems, 1984

External links

* Acritarch genera Natural history of New Zealand Cretaceous life {{paleo-eukaryote-stub