Fischerella is a genus of cyanobacteria belonging to the family Hapalosiphonaceae.

[1] The genus was first described by M. Gomont in 1895.

[1] The genus has cosmopolitan distribution.

[2] The genus name of Deightoniella is in honour of Christian Fischer (1801 - 1892), who was a Bohemian scientist and industrialist from Karlsbad (Baden).

[3] The genus was circumscribed by Jean-Baptiste Édouard Bornet and Charles Henri Marie Flahault in J. Bot.