Postgaardi

{{Short description|Genus of protozoans}}

{{Taxobox

| domain = Eukaryota

| unranked_regnum = Excavata

| divisio = Euglenozoa

| classis = Postgaardea{{cite journal | pmc = 2656514 | doi = 10.1186/1471-2180-9-16 |date=Jan 2009 |author1=Yubuki, N |author2=Edgcomb, Vp |author3=Bernhard, Jm |author4=Leander, Bs | title = Ultrastructure and molecular phylogeny of Calkinsia aureus: cellular identity of a novel clade of deep-sea euglenozoans with epibiotic bacteria | volume = 9| pages = 16| pmid = 19173734 | journal = BMC Microbiology | doi-access = free }}

| ordo = Postgaardida

| ordo_authority = Cavalier-Smith 2003

| familia = Postgaardidae

| familia_authority = Cavalier-Smith 2016

| genus = Postgaardi

| genus_authority = Fenchel et al. 1995

| subdivision_ranks = Species

| subdivision =

• Postgaardi mariagerensis Fenchel et al. 1995

}}

Postgaardi mariagerensis is a species of single-celled eukaryote in the Euglenozoa. Some have classified it in a class called Postgaardea along with Calkinsia, but as of 2009, Postgaardi is not well enough known to confidently determine its relationship with other organisms in the Euglenozoa. Both it and Calkinsia do live in low oxygen environments and are covered with bacteria which live on their surface.