Diphasia is a genus of hydrozoans belonging to the family Sertulariidae.
The genus has a cosmopolitan distribution.
Species The following species are recognised in the genus Diphasia:
Diphasia africana Diphasia alata Diphasia alternata Diphasia anaramosae Diphasia attenuata Diphasia cauloatheca Diphasia corniculata Diphasia cristata Diphasia delagei Diphasia densa Diphasia digitalis Diphasia dubia Diphasia fallax Diphasia heurteli Diphasia inornata Diphasia leonisae Diphasia margareta Diphasia minuta Diphasia mutulata Diphasia nigra Diphasia nuttingi Diphasia orientalis Diphasia paarmani Diphasia palmata Diphasia robusta Diphasia rosacea Diphasia saharica Diphasia scalariformis Diphasia subcarinata Diphasia tetraglochina Diphasia thornelyi Diphasia tropica Diphasia varians
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