Cristidiscoidea or Nucleariae is a proposed basal

holomycota Holomycota or Nucletmycea are a basal Opisthokont clade as sister of the Holozoa. It consists of the Cristidiscoidea and the kingdom Fungi. The position of nucleariids, unicellular free-living phagotrophic amoebae, as the earliest lineage of Hol ...

clade in which

Fonticula ''Fonticula'' is a genus of cellular slime mold which forms a fruiting body in a volcano shape. As long ago as 1979 it has been known to not have a close relationship with either the Dictyosteliida or the Acrasidae, the two well-established gro ...

and

Nucleariida Nucleariida is a group of amoebae with filose pseudopods, known mostly from soils and freshwater. They are distinguished from the superficially similar vampyrellids mainly by having mitochondria with discoid cristae, in the absence of superf ...

emerged, as sister of the

fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...

. Since it is close to the divergence between the main lineages of

and

animals Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in ...

, the study of Cristidiscoidea can provide crucial information on the divergent lifestyles of these groups and the evolution of

opisthokont The opisthokonts () are a broad group of eukaryotes, including both the animal and fungus kingdoms. The opisthokonts, previously called the "Fungi/Metazoa group", are generally recognized as a clade. Opisthokonts together with Apusomonadida and ...

s and

slime mold Slime mold or slime mould is an informal name given to several kinds of unrelated eukaryotic organisms with a life cycle that includes a free-living single-celled stage and the formation of spores. Spores are often produced in macroscopic mul ...

multicellularity A multicellular organism is an organism that consists of more than one cell, in contrast to unicellular organism. All species of animals, land plants and most fungi are multicellular, as are many algae, whereas a few organisms are partially uni- ...

. The holomycota tree is following Tedersoo et al.

Classification

* Class Cristidiscoidea Cavalier-Smith 1998 ** Order

Fonticulida ''Fonticula'' is a genus of cellular slime mold which forms a fruiting body in a volcano shape. As long ago as 1979 it has been known to not have a close relationship with either the Dictyosteliida or the Acrasidae, the two well-established grou ...

Cavalier-Smith 1993 *** Family Fonticulidae Worley, Raper & Hohl 1979 **** Genus ''

'' Worley, Raper & Hohl 1979 **** Genus '' Parvularia'' López-Escardó 2017 ***** Species '' P. atlantis'' López-Escardó 2017 ** Order

Cavalier-Smith 1993 *** Family Nucleariidae Cann & Page 1979 **** Genus ''

Nuclearia ''Nuclearia'' is a nucleariid Nucleariida is a group of amoebae with filose pseudopods, known mostly from soils and freshwater. They are distinguished from the superficially similar vampyrellids mainly by having mitochondria with discoid c ...

'' Cienkowski 1865

References

{{Taxonbar, from=Q15129670 Opisthokont classes Holomycota