Cryptista is a clade of algae-like

eukaryote Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacte ...

s. It is most likely related to

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 group ...

which includes plants and many algae, within the larger group

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 ...

. Although it has sometimes placed along with

Haptista Haptista is a proposed group of protists made up of centrohelids and haptophytes. Phylogenomic studies indicate that Haptista, together with ''Ancoracysta twista'', forms a sister clade to the SAR+Telonemia supergroup, but it may also be sister t ...

in the group

Hacrobia The cryptomonads-haptophytes assemblage is a proposed monophyletic grouping of unicellular eukaryotes that are not included in the SAR supergroup. Several alternative names have been used for the group, including Hacrobia (derived from "ha-" refe ...

, within the kingdom

Chromista Chromista is a biological kingdom consisting of single-celled and multicellular eukaryotic species that share similar features in their photosynthetic organelles (plastids). It includes all protists whose plastids contain chlorophyll ''c'', such ...

, most recent studies have found that Hacrobia is not a clade. For example, in 2016, a broad phylogenomic study found that cryptists fall within the group

, while haptophytes are closely related to the

SAR supergroup The SAR supergroup, also just SAR or Harosa, is a clade that includes stramenopiles (heterokonts), alveolates, and Rhizaria. The name is an acronym derived from the first letters of each of these clades; it has been alternatively spelled "RAS". T ...

Taxonomy

Based on studies done by Cavalier-Smith, Chao & Lewis 2015 *''

Corbihelia Corbihelia is a proposed phylum of eukaryotes. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Super Class Endohelia Cavalier-Smith 2015 ** Class Endohelea Cavalier-Smith 2012 *** Order Microhelida Cavalier-Smith 2011 ...

'' ** Phylum Microheliellida Tedersoo 2017 ndohelia Cavalier-Smith 2015*** Class

Endohelea Endohelea is a proposed clade of eukaryotes that are related to Archaeplastida and the SAR supergroup. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Class Endohelea Cavalier-Smith 2012 ** Order Microhelida Cavalier-S ...

Cavalier-Smith 2012 * Clade Cryptista s.s. ** Phylum Palpitophyta Tedersoo 2017 *** Class

Palpitea Palpitea is a proposed clade of eukaryotes that are related to Archaeplastida and the SAR supergroup. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Subphylum Palpitia Palpitea is a proposed clade of eukaryotes th ...

Cavalier-Smith 2012 ** Clade

Rollomonadia Rollomonadia is a proposed subphylum of cryptists, including all currently described cryptist species except Palpitomonas bilix. References

{{Cryptista Cryptista Hacrobia ...

Cavalier-Smith 2013 stat. nov. *** Phylum Kathablepharidophyta Okamoto & Inouye 2005 eucocrypta Cavalier-Smith 2015**** Class

Leucocryptea The katablepharids, a group of heterotrophic flagellates, have been considered as part of the Cryptista since katablepharids were described in 1939. Although they differ from other cryptophytes and have even been proposed to be alveolates, early 2 ...

Cavalier-Smith 2004 athablepharidea (sic) Okamoto & Inouye 2005; Kathablepharidophyceae*** Phylum

Cryptophyta The cryptophyceae are a class of algae, most of which have plastids. About 220 species are known, and they are common in freshwater, and also occur in marine and brackish habitats. Each cell is around 10–50 μm in size and flattened in shape, ...

Pascher 1913 em. Adl et al. 2012 (

Cryptomonada Cryptomonada is a proposed super-class of Cryptists linking Cryptophyceae and Goniomonadea, which was first proposed by Cavalier-Smith in 2004. He made this proposal based on three shared morphological characteristics: Presence of a periplast, ...

Cavalier-Smith 2004 sta. n.] **** Class

Goniomonadea Goniomonadea is a proposed class of cryptomonads which includes the orders Goniomonadida and Hemiarmida. Taxonomy * Order Goniomonadida Novarino & Lucas 1993 oniomonadales Novarino & Lucas 1993** Family Goniomonadidae Hill 1991 oniomonadaceae ...

Cavalier-Smith 1993 **** Class

Cryptophyceae The cryptophyceae are a class of algae, most of which have plastids. About 220 species are known, and they are common in freshwater, and also occur in marine and brackish habitats. Each cell is around 10–50 μm in size and flattened in shape, ...

Fritsch 1937

References

External links

Tree of Life: Hacrobia
Infrakingdoms Taxa named by Thomas Cavalier-Smith {{Hacrobia-stub