Taxa included

Pedder, I.J. (1965). Abnormal segmentation of the abdomen in six species of British pseudoscorpions. Entomologist 98: 108–112.

Taxon
Chthonius tenuis L. Koch, 1873 (Pseudoscorpiones: Chthoniidae) 108, 109, fig. 1, Chthonius tenuis
Dactylochelifer latreillii (Leach, 1817) (Pseudoscorpiones: Cheliferidae) 108, 109, figs 5–9, (as Dactylochelifer latreillei), Dactylochelifer latreillii (Leach)
Pselaphochernes dubius (O. Pickard-Cambridge, 1892) (Pseudoscorpiones: Chernetidae) 108, 110, Allochernes dubius (O. Pickard-Cambridge)
Neobisium (Neobisium) maritimum (Leach, 1817) (Pseudoscorpiones: Neobisiidae) 108, 109, fig. 2, Neobisium maritimum (Leach)
Lamprochernes nodosus (Schrank, 1803) (Pseudoscorpiones: Chernetidae) 108–110, fig. 10, Lamprochernes nodosus (Schrank)
Obisium muscorum Leach, 1817 (Pseudoscorpiones: Cheliferidae) 108, 109, figs 3–4, Neobisium muscorum (Leach)