Lithacrosiphon is a genus of worms belonging to the family Aspidosiphonidae.

[1] The species of this genus are found in all world oceans.

[1] Species:[2] L. cristatus was redescribed[when?]

and included the formerly distinct species L. altriconus, L. gurjanovae, L. indicus, and L.

[2] L. uniscutatus was redescribed and included L. kukenthali and L.