is a species of the class Cyanophyceae in the family Stigonemataceae and order Stigonematales.
Hapalosiphon arboreus
Hapalosiphon aureus
Hapalosiphon brasiliensis
Hapalosiphon confervaceus
Hapalosiphon delicatulus
Hapalosiphon flexuosus
Hapalosiphon fontinalis
Hapalosiphon hibernicus
Hapalosiphon intricatus
Hapalosiphon laminosus
Hapalosiphon pumilus
Hapalosiphon welwitschii