Margaretta is a genus of bryozoans belonging to the family Margarettidae.

The genus has cosmopolitan distribution.

Species:

• Margaretta amitabhae Di Martino & Taylor, 2015
• Margaretta amplipora Sonar & Gaikwad, 2016
• Margaretta aquitanica Canu, 1918
• Margaretta barbata (Lamarck, 1816)
• Margaretta bipartita (Reuss, 1869)
• Margaretta buski Harmer, 1957
• Margaretta cereoides (Ellis & Solander, 1786)
• Margaretta chuakensis (Waters, 1907)
• Margaretta coeca (Ortmann, 1890)
• Margaretta congesta (Cheetham, 1963)
• Margaretta fallax (Canu & Bassler, 1920)
• Margaretta filiformis (Canu & Bassler, 1929)
• Margaretta fusiformis Guha & Gopikrishna, 2007
• Margaretta gracilior (Ortmann, 1892)
• Margaretta gracilis (Canu & Bassler, 1929)
• Margaretta guhai Sonar & Gaikwad, 2016
• Margaretta hariparensis Sonar & Gaikwad, 2016
• Margaretta levinseni (Canu & Bassler, 1930)
• Margaretta longicollis Tilbrook, 2006
• Margaretta nodifera (Canu & Bassler, 1920)
• Margaretta opuntioides (Pallas, 1766)
• Margaretta parviporosa (Canu & Bassler, 1920)
• Margaretta pentaceratops Di Martino, Taylor & Portell, 2017
• Margaretta punctata (Tenison Woods, 1880)
• Margaretta rajui Guha & Gopikrishna, 2007
• Margaretta tenuis Harmer, 1957
• Margaretta triplex Harmer, 1957
• Margaretta turgida (Terawi & Srivastava, 1967)
• Margaretta vicksburgica (Canu & Bassler, 1920)
• Margaretta watersi (Canu & Bassler, 1930)

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