Andrognathidae Cope, 1869 (additional source)
Fioria Silvestri, 1898 (additional source)
Fioria hyrcana Golovatch, 1980 (additional source)
Hirudicryptus Enghoff & Golovatch, 1995 (identification resource)
Hirudicryptus abchasicus Golovatch, Evsyukov & Reip, 2015 (original description)
Hirudisoma Fanzago, 1881 (additional source)
Hirudisoma roseum (Victor, 1839) (source of synonymy)
Hirudisomatidae Silvestri, 1896 (additional source)
Siphonocryptida (additional source)
Siphonocryptidae Pocock, 1894 (additional source)