Diphasia

Diphasia
Diphasia alata
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Cnidaria
Class:	Hydrozoa
Order:	Leptothecata
Family:	Sertulariidae
Genus:	Diphasia Agassiz, 1862
Synonyms
DiphasiellaStechow, 1921 DiphasisAgassiz, 1862 NigellastrumOken, 1815

Diphasia is a genus of hydrozoans belonging to the family Sertulariidae. ^[1]

The genus has a cosmopolitan distribution. ^[1]

Species

The following species are recognised in the genus Diphasia: ^[2]

• Diphasia africana Gil & Ramil, 2017
• Diphasia alata (Hincks, 1855)
• Diphasia alternata Galea, 2019
• Diphasia anaramosae Gil & Ramil, 2017
• Diphasia attenuata (Hincks, 1866)
• Diphasia cauloatheca Billard, 1920
• Diphasia corniculata (Murray, 1860)
• Diphasia cristata Billard, 1920
• Diphasia delagei Billard, 1912
• Diphasia densa (Stechow, 1923)
• Diphasia digitalis (Busk, 1852)
• Diphasia dubia Hargitt, 1927
• Diphasia fallax (Johnston, 1847)
• Diphasia heurteli Billard, 1924
• Diphasia inornata Nutting, 1927
• Diphasia leonisae Gil & Ramil, 2017
• Diphasia margareta (Hassall, 1841)
• Diphasia minuta Billard, 1920
• Diphasia mutulata (Busk, 1852)
• Diphasia nigra (Pallas, 1766)
• Diphasia nuttingi Stechow, 1913
• Diphasia orientalis Billard, 1920
• Diphasia paarmani Nutting, 1904
• Diphasia palmata Nutting, 1905
• Diphasia robusta Fraser, 1941
• Diphasia rosacea (Linnaeus, 1758)
• Diphasia saharica Gil & Ramil, 2017
• Diphasia scalariformis Kirkpatrick, 1890
• Diphasia subcarinata (Busk, 1852)
• Diphasia tetraglochina Billard, 1907
• Diphasia thornelyi Ritchie, 1909
• Diphasia tropica Nutting, 1904
• Diphasia varians Jarvis, 1922

References

1. "Diphasia Agassiz, 1862". www.gbif.org. Retrieved 9 July 2021.
2. "WoRMS - World Register of Marine Species - Diphasia Agassiz, 1862". www.marinespecies.org. Retrieved 2025-06-30.