Microheliella
Scientific classification Edit this classification
Domain: Eukaryota
Clade: Diaphoretickes
Phylum: Cryptista
Class: Endohelea
Order: Microhelida
Cavalier-Smith 2011
Family: Microheliellidae
Cavalier-Smith & Chao 2012
Genus: Microheliella
Cavalier-Smith & Chao 2012
Species:
M. maris
Binomial name
Microheliella maris
Cavalier-Smith & Chao 2012

Microheliella is a monotypic genus of protists containing the sole species M. maris, first described in 2012. It has a variety of unusual morphological characteristics which make its broader classification difficult. These include a centrosome with two concentric granular shells and axopodia much simpler in structure than in visually similar protists (other 'heliozoa').[1]

Recent phylogenomic analyses suggest the microhelida are sister to the Cryptista, forming a clade called Pancryptista, which would be sister to the Archaeplastida.[2][3]

CAM clade
Archaeplastida

Rhodelphidia

Rhodophyta

Picozoa

Chloroplastida

Glaucophyta

Pancryptista

Microheliella maris

Cryptista

Palpitia

Cryptomonada

References

  1. ^ Yabuki, A.; et al. (2012). "Microheliella maris (Microhelida ord. n.), an ultrastructurally highly distinctive new axopodial protist species and genus, and the unity of phylum Heliozoa". Protist. 163 (3): 356–388. doi:10.1016/j.protis.2011.10.001. PMID 22153838.
  2. ^ Yazaki, Euki; Yabuki, Akinori; Imaizumi, Ayaka; Kume, Keitaro; Hashimoto, Tetsuo; Inagaki, Yuji (2021-08-31). "Phylogenomics invokes the clade housing Cryptista, Archaeplastida, and Microheliella maris". pp. 2021.08.29.458128. bioRxiv 10.1101/2021.08.29.458128.
  3. ^ Yazaki, Euki; Yabuki, Akinori; Imaizumi, Ayaka; Kume, Keitaro; Hashimoto, Tetsuo; Inagaki, Yuji (2022). "The closest lineage of Archaeplastida is revealed by phylogenomics analyses that include Microheliella maris". Open Biol. 12: 210376. doi:10.1098/rsob.210376. PMC 9006020.
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