Polyphysaceae

{{Short description|Family of algae}}

{{Automatic taxobox

| image = Acetabularia.JPG

| image_caption = Acetabularia sp.

| taxon = Polyphysaceae

| authority = KützingKützing, 1843: 302, 311. Source publication: {{cite journal | author = Silva PC | year = 1980 | title = Names of classes and families of living algae: with special reference to their use in the Index Nominum Genericorum (Plantarum) | journal = Regnum Vegetabile | volume = 103 | pages = 1–156}}

| subdivision_ranks = Genera

| subdivision =

• Acetabularia
• Chalmasia
• Clypeina
• Ioanella
• Parvocaulis
• Pseudoclypeina

}}

The Polyphysaceae is a taxonomic family of green algae, one of three families in the order Dasycladales.{{cite web |

last = Guiry | first = MD |author2=GM Guiry| title = AlgaeBase version 4.2 Taxonomy Browser | work =AlgaeBase | publisher = National University of Ireland, Galway | year = 2007 | url = http://www.algaebase.org/browse/taxonomy/?id=5151 | accessdate = 2007-09-22}} For single-celled organisms, they are huge, growing to nearly a foot long in some cases.{{citation needed|date=April 2018}}