Endohelea

Endohelea is a proposed clade of eukaryotes that are related to Archaeplastida and the SAR supergroup.^[2][3] They used to be considered heliozoans, but phylogenetically they belong to a group of microorganisms known as Cryptista.^[1]

Endohelea
Scientific classification
Domain:	Eukaryota
Clade:	Diaphoretickes
Clade:	CAM
Clade:	Pancryptista
Phylum:	Cryptista
Subphylum:	Endohelia Cavalier-Smith, 2021[1]
Class:	Endohelea Cavalier-Smith, 2012
Orders[1]
Microhelida Axomonadida

Classification

Based on studies done by Cavalier-Smith, Chao & Lewis in 2015, the class contained two orders: Microhelida and Heliomonadida.^[4][5] However, according to a study by Cavalier-Smith, published in 2022, the order Heliomonadida is actually part of Cercozoa, and only one species of heliomonad, Tetrahelia pterbica, has been kept in Endohelea as its own order Axomonadida.^[1]

• Class Endohelea Cavalier-Smith 2012
  • Order Microhelida Cavalier-Smith 2011
    • Family Microheliellidae Cavalier-Smith 2011
      • Genus Microheliella Cavalier-Smith & Chao 2012
  • Order Axomonadida Cavalier-Smith 2012 emend. 2021^[1]
    • Family Tetraheliidae Cavalier-Smith 2021
      • Genus Tetrahelia Cavalier-Smith 2021

According to a study by Yazaki et al. published in 2022, Microheliella is Cryptista's sister taxon.^[6]