Some species after Adrain & Westrop, 2005

<==o †Bathyuridae Walcott, 1886
   |?-o †Gignopeltis Raymond, 1924
   |  `-- †G. rara (Billings, 1865) [Dolichometopus? rarus Billings, 1865]
   |?-o †Benthamaspis Poulsen, 1946
   |  `-- †B. hintzei Boyce, 1989
   |?-o †Strigigenalis Whittington & Ross in Whittington, 1953
   |  |-- †S. caudata (Billings, 1865)
   |  `-- †S. cassinensis Whittington, 1953
   |-- †Bathyurus
   |--o †Bolbocephalus Whitfield, 1890 [Rananasus Cullison, 1944]
   |  |-- †B. seeleyi (Whitfield, 1886) [Bathyurus? seeleyi Whitfield, 1886]
   |  |-- †B. augustisulcatus Poulsen, 1927
   |  |-- †B. brevicephalus (Cullison, 1944) [Rananasus brevicephalus Cullison, 1944]
   |  |-- †B. conicus (Cullison, 1944) [Rananasus conicus Cullison, 1944]
   |  |-- †B. convexus (Billings, 1865) [Dolichometopus? convexus Billings, 1865]
   |  |-- †B. ellesmerensis Adrain & Westrop, 2005
   |  |-- †B. glaber Poulsen, 1927
   |  |-- †B. groenlandicus Poulsen, 1937
   |  |-- †B. jeffersonensis Cullison, 1944
   |  |-- †B. kindlei Boyce, 1989
   |  |-- †B. saintclairi Cullison, 1944
   |  |-- †B. stevensi Boyce, 1989
   |  `-- †B. truncatus (Whitfield, 1890) [Bathyurus? truncatus Whitfield, 1890]
   |--o †Ceratopeltis Poulsen, 1937
   |  |-- †C. latilimbata Poulsen, 1937
   |  |-- †C. bachensis Adrain & Westrop, 2005
   |  `-- †C. forteyi Adrain & Westrop, 2005
   |--o †Jeffersonia Poulsen, 1927 [incl.? †Bathyurina Poulsen, 1937]
   |  |-- †J. exterminata Poulsen, 1927
   |  |-- †J. megalops (Poulsen, 1937) [Bathyurina megalops Poulsen, 1937]
   |  |-- †J. timon (Billings, 1865) [Bathyurus timon Billings, 1865]
   |  `== “several poorly known species from Missouri described by Cullison, 1944” (Adrain & Westrop, 2005)
   |--o †Licnocephala Ross, 1951
   |  |-- †L. bicornuta Ross, 1951
   |  |-- †L. clavigladius Hintze, 1953
   |  |-- †L. ovata Ross, 1953
   |  |-- †L. sanddoelaensis Adrain & Westrop, 2005
   |  |-- †L. sminue Fortey & Peel, 1990
   |  `-- †L. sp. [Adrain & Westrop, 2005]
   `--o †Peltabellia Whittington, 1953 [Biolgina Maksimova, 1955] [possibly a wastebasket taxon]
      |-- †P. peltabella (Ross, 1951) [Jeffersonia peltabella Ross, 1951]
      |-- †P. amplimarginatus (Billings, 1859) [Bathyurus amplimarginatus Billings, 1859]
      |-- †P. crassimarginata (Cullison, 1944) [Jeffersonia crassimarginata Cullison, 1944]
      |-- †P. knighti Boyce, 1989
      |-- †P.? lata Zhou & Fortey, 1986
      |-- †P. permarginatus (Cullison, 1944) [Bathyurellus permarginatus Cullison, 1944]
      |-- †P. sibirica (Maksimova, 1955) [Biolgina sibirica Maksimova, 1955]
      |-- †P. willistoni Lochman, 1966
      `-- †“P.” baumannensis Adrain & Westrop, 2005

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