Cryptista is a clade of alga-like
eukaryote
The eukaryotes ( ) constitute the Domain (biology), domain of Eukaryota or Eukarya, organisms whose Cell (biology), cells have a membrane-bound cell nucleus, nucleus. All animals, plants, Fungus, fungi, seaweeds, and many unicellular organisms ...
s. It is most likely related to
Archaeplastida which includes plants and many algae, within the larger group
Diaphoretickes.
Other characteristic features of cryptophyte mtDNAs include large syntenic clusters resembling α-proteobacterial operons that encode bacteria-like rRNAs, tRNAs, and ribosomal protein genes. Additionally, they are an evolutionarily significant lineage found in mostly marine, glacial and freshwater environments.
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 supergroup#Internal phylogeny, TSAR Supergroup (b ...
in the group
Hacrobia, within the kingdom
Chromista, 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
Archaeplastida, while haptophytes are closely related to the
SAR supergroup.
Taxonomy
Based on studies done by Cavalier-Smith, Chao & Lewis 2015
*
Corbihelia
** Clade
Endohelia Cavalier-Smith 2015
*** Clade
Endohelea Cavalier-Smith 2012
* Clade Cryptista s.s.
** Clade
Palpitophyta Tedersoo 2017
*** Clade
Palpitea Cavalier-Smith 2012
** Clade
Rollomonadia Cavalier-Smith 2013 stat. nov.
*** Clade
Kathablepharidophyta Okamoto & Inouye 2005 eucocrypta Cavalier-Smith 2015**** Clade
Leucocryptea Cavalier-Smith 2004*** Clade
Cryptophyta
The cryptomonads (or cryptophytes) are a Class (biology), superclass of algae, most of which have chloroplast, plastids. They are traditionally considered a Division (taxonomy), division of algae among phycologists, under the name of Cryptophyta ...
Pascher 1913 em. Adl et al. 2012 (
Cryptomonada Cavalier-Smith 2004 sta. n.]
**** Clade
Goniomonadea Cavalier-Smith 1993
**** Clade
Cryptophyceae Fritsch 1937
[
https://www.researchgate.net/figure/Character-evolution-in-the-Cryptista-a-The-phylogenetic-relationship-among_fig6_261519725
]
References
External links
Tree of Life: Hacrobia
Infrakingdoms
Taxa named by Thomas Cavalier-Smith
{{Cryptista-stub