Haptista is a proposed group of
protist
A protist () is any eukaryotic organism (that is, an organism whose cells contain a cell nucleus) that is not an animal, plant, or fungus. While it is likely that protists share a common ancestor (the last eukaryotic common ancestor), the e ...
s made up of
centrohelids and
haptophyte
The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for '' Prymnesium''), are a clade of algae.
The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at ...
s.
Phylogenomic studies indicate that Haptista, together with ''Ancoracysta twista'', forms a sister clade to the
SAR+
Telonemia
Telonemia is a phylum of microscopic eukaryote, single-celled organisms. They were formerly classified as protists until that kingdom fell out of general use, and are suggested to have evolutionary significance in being a possible transitional fo ...
supergroup, but it may also be sister to the
Cryptista
Cryptista is a clade of algae-like eukaryotes. It is most likely related to Archaeplastida which includes plants and many algae, within the larger group Diaphoretickes.
Although it has sometimes placed along with Haptista in the group Hacrob ...
(+
Archaeplastida
The Archaeplastida (or kingdom Plantae '' sensu lato'' "in a broad sense"; pronounced /ɑːrkɪ'plastɪdə/) are a major group of eukaryotes, comprising the photoautotrophic red algae (Rhodophyta), green algae, land plants, and the minor gr ...
).
It is thus one of the earliest diverging
Diaphoretickes
Diaphoretickes () is a major group of eukaryotic organisms, with over 400,000 species. The majority of the earth's biomass that carries out photosynthesis belongs to Diaphoretickes.
Diaphoretickes includes:
* Archaeplastida (comprising red alg ...
.
Taxonomy
Based on studies done by Cavalier-Smith, Chao & Lewis 2015 and Ruggiero et al. 2015.
* Subphylum
Centroheliozoa Cushman & Jarvis 1929 sensu Durrschmidt & Patterson 1987 Haeckel 1862 stat. n. Margulis 1974 em. Cavalier-Smith 2003">eliozoa Haeckel 1862 stat. n. Margulis 1974 em. Cavalier-Smith 2003** Class
Centrohelea Kuhn 1926 stat. n. Cavalier-Smith 1993 Hartmann 1913; Centroplasthelida Febvre-Chevalier 1984">entroplastiales; Centrohelina Hartmann 1913; Centroplasthelida Febvre-Chevalier 1984* Subphylum
Haptophytina Cavalier-Smith 2015 (
Haptophyta
The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for '' Prymnesium''), are a clade of algae.
The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at ...
Hibberd 1976 sensu Ruggerio et al. 2015)
** Clade
Rappemonada Kim et al. 2011
*** Class
Rappephyceae Cavalier-Smith 2015
** Clade
Haptomonada (Margulis & Schwartz 1998) [Haptophyta Hibberd 1976 emend. Edvardsen & Eikrem 2000; Prymnesiophyta
Green & Jordan, 1994; Prymnesiomonada; Prymnesiida Hibberd 1976; Haptophyceae Christensen 1962 ex Silva 1980; Haptomonadida; Patelliferea Cavalier-Smith 1993]
*** Class Pavlovophyceae
(Cavalier-Smith 1986) Green & Medlin 2000
*** Class Prymnesiophyceae
Christensen 1962 emend. Cavalier-Smith 1996 [Haptophyceae s.s.; Prymnesiophycidae
Cavalier-Smith 1986; Coccolithophyceae
Casper 1972 ex Rothmaler 1951]
References
External links
Tree of Life: Hacrobia
Haptista,
Taxa named by Thomas Cavalier-Smith
Infrakingdoms
{{Microbiology-stub