Aconchulinida is an order of

Cercozoa Cercozoa is a phylum of diverse single-celled eukaryotes. They lack shared morphological characteristics at the microscopic level, and are instead defined by molecular phylogenies of rRNA and actin or polyubiquitin. They were the first major eu ...

in the subclass Filosia. The outer zone is clear ectoplasm and has many vacuoles. It has a single nucleus. Its size range from 10 to 400 micrometers. It contains few

genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ...

, possibly including only ''Penardia'', but usually also considered to encompass all of the

Vampyrellidae The family Vampyrellidae is a subgroup of the order Aconchulinida (formerly Vampyrellida) within the phylum Cercozoa. Based on molecular sequence data, the family currently comprises the genus ''Vampyrella'', and maybe several other vampyrellid ...

References

{{Cercozoa-stub Cercozoa orders