Holozoa is a group of living things that includes animals, and some single-celled relatives of animals. It excludes fungi.[1][2][3][4]Holozoa is also an old name for the tunicategenusDistaplia.[5]
Holozoa is a clade: a group of plants or animals with a common ancestor. It has all organisms close to animals.[6]
An example of a well-known holozoan is the choanoflagellate, which looks a lot like the cells of a sponge. Proterospongia is an example of a choanoflagellate that might give clues as to how sponges evolved.
↑Elias M, Archibald JM (August 2009). "The RJL family of small GTPases is an ancient eukaryotic invention probably functionally associated with the flagellar apparatus". Gene. 442 (1–2): 63–72. doi:10.1016/j.gene.2009.04.011. PMID19393304.
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Tatiàn, Marcos; Antacli, Julieta Maria; Sahade, Ricardo (2005). "Ascidians (Tunicata, Ascidiacea): species distribution along the Scotia Arc". Scientia Marina. 69 (suppl. 2): 205–214. doi:10.3989/scimar.2005.69s2205.