After Parker, 1982 and Martin & Davis, 2001

<==o Syncarida Packard, 1885
   |--o Bathynellacea Chappuis, 1915
   |  |--o Bathynellidae Chappuis, 1915
   |  |  |-- Bathynella Vejdovsky, 1882
   |  |  `-- Pacificabathynella Schminke & Noodt, 1988
   |  `--o Parabathynellidae Noodt, 1965 [incl. Leptobathynellidae]
   |     |-- Califobathynella Cho, 1997
   |     |-- Hexabathynella Schminke, 1972
   |     |-- Iberobathynella Schminke, 1973
   |     `-- Texanobathynella Delamare Deboutteville, Coineau & Serban, 1975
   `--+?-o †Palaeocaridacea Brooks, 1962
      |  |-- †Palaeocaris secretanae
      |  `-- †Uronectes Bronn, 1850
      `--o Anaspidacea Calman, 1904
         |--o Anaspididae Thomson, 1893
         |  |--o Allanaspides Swain, Wilson, Hickman & Ong, 1970
         |  |  |-- A. hickmani Swain, Wilson & Ong, 1970 (Hickman's pygmy mountain shrimp)
         |  |  `-- A. helonomus Swain, Wilson, Hickman & Ong, 1970
         |  |--o Anaspides Thomson, 1894
         |  |  |-- A. tasmaniae Thomson, 1892
         |  |  `-- A. spinulae Williams, 1965
         |  `-- Paranaspides lacustris Smith, 1909
         |--o Koonungidae Sayce, 1908
         |  |-- Koonunga Sayce, 1907
         |  `-- Micraspides Nicholls, 1931
         |--o Psammaspididae Schminke, 1974
         |  |-- Eucrenonaspides oinotheke Knott & Lake, 1980
         |  `-- Psammaspides Schminke, 1974
         `--o Stygocarididae Noodt, 1963
            |-- Oncostygocaris Schminke, 1980
            |-- Parastygocaris Noodt, 1963
            |-- Stygocarella Schminke, 1980
            `-- Stygocaris Noodt, 1963

Reference(s):