• Histrio Fischer, 1813
• Histrio L. Pfeiffer, 1854 accepted as Coryda Albers, 1850
• Histrio Sterki, 1878 accepted as Histriculus Corliss, 1960
• Histrio acuminatus Maskell, 1886 (uncertain > taxon inquirendum)
• Histrio complanatus Stokes, 1887 accepted as Histriculus complanatus (Stokes, 1887) Corliss, 1960
• Histrio erethisticus Stokes, 1887 accepted as Histriculus histrio (Müller, 1773) Corliss, 1960
• Histrio gibbus (Mitchill, 1815) accepted as Histrio histrio (Linnaeus, 1758)
• Histrio histrio (Linnaeus, 1758)
• Histrio histrio (Müller, 1786) Stein, 1859 accepted as Histriculus histrio (Müller, 1773) Corliss, 1960
• Histrio hyalinus Vörösvary, 1950 accepted as Histriculus histrio (Müller, 1773) Corliss, 1960
• Histrio inquietus Stokes, 1887 accepted as Rigidohymena inquieta (Stokes, 1887) Berger, 2011
• Histrio jagua Nichols, 1920 accepted as Histrio histrio (Linnaeus, 1758)
• Histrio lemani Dragesco, 1966 accepted as Gastrostyla steinii Engelmann, 1862
• Histrio macrostoma Gellért & Tamás, 1958 accepted as Sterkiella histriomuscorum (Foissner, Blatterer, Berger & Kohmann, 1991) Foissner, Blatterer, Berger & Kohmann, 1991
• Histrio muscorum Kahl, 1932 accepted as Sterkiella histriomuscorum (Foissner, Blatterer, Berger & Kohmann, 1991) Foissner, Blatterer, Berger & Kohmann, 1991
• Histrio pictus (Valenciennes, 1837) accepted as Histrio histrio (Linnaeus, 1758)
• Histrio quadrinucleatus Sick, 1933 accepted as Sterkiella quadrinucleatus (Sick, 1933) Berger, 1999
• Histrio raninus (Tilesius, 1809) accepted as Histrio histrio (Linnaeus, 1758)
• Histrio similis Quennerstedt, 1867 accepted as Sterkiella quadrinucleatus (Sick, 1933) Berger, 1999
• Histrio sphagni Stokes, 1891 accepted as Histriculus sphagni (Stokes, 1891) Corliss, 1960
• Histrio steinii Sterki, 1878 accepted as Histriculus histrio (Müller, 1773) Corliss, 1960
• Histrio vorax Stokes, 1891 accepted as Histriculus vorax (Stokes, 1891) Corliss, 1960
• Histriobdella Van Beneden, 1858
• Histriobdella homari Beneden, 1858
• Histriobdellidae Claus & Moquin-Tandon, 1884
• Histriodrilus Foettinger, 1884
• Histriodrilus benedeni Foettinger, 1884 accepted as Histriobdella homari Beneden, 1858
• Histrionicus Lesson, 1828
• Histrionicus histrionicus (Linnaeus, 1758)
• Histriophoca Gill, 1873
• Histriophoca fasciata (Zimmermann, 1783)
• Oxytricha (Histrio)
• Oxytricha (Histrio) similis Quennerstedt, 1867 accepted as Sterkiella quadrinucleatus (Sick, 1933) Berger, 1999