After Martin & Davis, 2001, with genera and species from “Wikipedia”

<==o Thermosbaenacea Monod, 1927
   |--o Halosbaenidae Monod & Cals, 1988
   |  |-- Limnosbaena finki Mestrov & Lattinger-Penko, 1969
   |  |--o Halosbaena
   |  |  |-- H. acanthura Stock, 1976
   |  |  |-- H. fortunata Bowman & Iliffe, 1986
   |  |  `-- H. tulki Poore & Humphreys, 1992
   |  `-- Theosbaena cambodjiana Cals & Boutin, 1985
   |--o Monodellidae Taramelli, 1954
   |  |-- Monodella stygicola Ruffo, 1949
   |  `--o Tethysbaena
   |     |-- T. aiakos Wagner, 1994
   |     |-- T. argentarii (Stella, 1951)
   |     |-- T. atlantomaroccana (Boutin & Cals, 1985)
   |     |-- T. calsi Wagner, 1994
   |     |-- T. colubrae Wagner, 1994
   |     |-- T. coqui Wagner, 1994
   |     |-- T. gaweini Wagner, 1994
   |     |-- T. haitiensis Wagner, 1994
   |     |-- T. halophila (S.L. Karaman, 1953)
   |     |-- T. juglandis Wagner, 1994
   |     |-- T. juriaani Wagner, 1994
   |     |-- T. lazarei Wagner, 1994
   |     |-- T. relicta (Por, 1962)
   |     |-- T. sanctaecrucis (Stock, 1976)
   |     |-- T. scabra (Pretus, 1991)
   |     |-- T. scitula Wagner, 1994
   |     |-- T. siracusae Wagner, 1994
   |     |-- T. stocki Wagner, 1994
   |     |-- T. somala (Chelazzi & Messana, 1982)
   |     |-- T. tarsiensis Wagner, 1994
   |     |-- T. texana (Maguire, 1965)
   |     |-- T. tinima Wagner, 1994
   |     `-- T. vinabayesi Wagner, 1994
   |-- Thermosbaena mirabilis Monod, 1924 [Thermosbaenidae Monod, 1927]
   `--o Tulumella [Tulumellidae Wagner, 1994]
      |-- T. bahamensis Yager, 1988
      |-- T. grandis Yager, 1988
      `-- T. unidens Bowman & Iliffe, 1988

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