Hacrobia
| Hacrobia | |
|---|---|
| |
| The coccolithophore Gephyrocapsa oceanica | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Kingdom: | Chromista |
| Subkingdom: | Hacrobia Okamoto et al., 2009 |
| Groups | |
| Synonyms | |
| |
The cryptomonads-haptophytes assemblage is a proposed but disputed monophyletic grouping[1] 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-" referring to Haptophyta, "-cr-" referring to cryptomonads, and "-bia" as a general suffix referring to life);[2] CCTH (standing for Cryptophyta, Centrohelida, Telonemia and Haptophyta);[3] and "Eukaryomonadae".[4]
As of February 2012[update], it is unclear whether this group is monophyletic or not; results of phylogenetic studies are "often dependent on the selection of taxa and gene data set".[3] Two 2012 studies produced opposite results.[3][5]
Members
In the past,
Several recent studies have concluded that Haptophyta and Cryptophyta do not form a monophyletic group.[11] The former are a sister group to the SAR group, the latter cluster with the Archaeplastida (plants in the broad sense).[5] As of February 2012[update], it remains unclear whether the Hacrobia forms a monophyletic group.[3]
Another study[12] suggested the following arrangement: centrohelids are related to haptophytes and form the clade Haptista; Haptista is the sister group to SAR; Cryptista are related to Archaeplastida; and Haptista + SAR is the sister clade to Cryptista + Archaeplastida.
Phylogeny
Based on work done by Silar 2016.[13][14]
| Hacrobia |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
References
- PMID 18585873.
- ^ PMID 19759916.
- ^ PMID 22319147.
- ^ "EUKARYOMONADAE". Retrieved 2015-03-01.
- ^ PMID 22298847.
- PMID 18296415.
- PMID 16956407.
- ISBN 978-1-904455-67-7. Retrieved 21 January 2011.
- PMID 19398025.
- PMID 20333193.
- PMID 20194427
- PMID 26817772.
- ^ Silar, Philippe (2016), "Protistes Eucaryotes: Origine, Evolution et Biologie des Microbes Eucaryotes", HAL Archives-ouvertes: 1–462
- PMID 25923521
- PMID 29666938
External links
