• Geminella Billard, 1925 [Family: Sertulariidae]
• Geminella J. Schröter, 1870 accepted as Schroeteria G. Winter, 1881 [Family: Ascomycota incertae sedis]
• Geminella Szczechura, 1994 † [Family: Catenicellidae]
• Geminella Turpin, 1828 [Family: Chlorellaceae]
• Geminella amphigranulata Teiling
• Geminella ceramensis (Billard, 1925)
• Geminella crenulatocollis Prescott, 1944
• Geminella delastrina (Tul. & C. Tul.) J. Schröt., 1870 accepted as Schroeteria delastrina (Tul. & C. Tul.) G. Winter, 1881
• Geminella elipsoidea (Prescott) G.M. Smith, 1950
• Geminella interrupta Turpin, 1828
• Geminella longispira Hindák, 1996
• Geminella marina G. Hamel, 2007
• Geminella minor (Nägeli) Heering, 1914
• Geminella monospora J.W.G. Lund accepted as Gloeotila monospora (J.W.G. Lund) Hindák, 1996
• Geminella mutabilis (Brébisson) Wille, 1911
• Geminella ordinata (W. West & G.S. West) Heering, 1914
• Geminella paradoxa (Chodat & Topali) Printz, 1927 accepted as Radiofilum paradoxum (Chodat & Topali) Printz, 1964
• Geminella planctonica
• Geminella protogenita (Kützing) G. S West accepted as Gloeotila protogenita Kützing, 1849
• Geminella scalariformis (G.S. West) G.S. West
• Geminella spiralis (Chodat) G.S. Smith accepted as
• Geminella spirochroma Hindák, 1996
• Geminella subtilis Vannucci-Mendes, 1946
• Geminella terricola J.B. Petersen, 1932