Agaricocrinus Austin, 1851 † (original description)
Batrichnis Harkness, 1851 (original description)
Chelaspodos Harkness, 1851 (original description)
Dasydytes Gosse, 1851 (original description)
Diplax Gosse, 1851 accepted as Mytilina Bory de St. Vincent, 1826 (original description)
Gnathocrinus Austin, 1851 (original description)
Hatasia Gray, 1851 accepted as Pholadidea Turton, 1819 (original description)
Mimosella Hincks, 1851 (original description)
Navea Gray, 1851 accepted as Penitella Valenciennes in Du Petit-Thouars, 1846 (original description)
Oithona Alder & Hancock, 1851 accepted as Fiona Alder & Hancock in Forbes & Hanley, 1851 (original description)
Pompholyx Gosse, 1851 (original description)
Pseudocrania M'Coy, 1851 † (original description)
Sacculus Gosse, 1851 accepted as Ascomorpha Perty, 1850 (original description)
Saurichnis Harkness, 1851 (original description)
Spondylobolus M'Coy, 1851 † (original description)
Steganodictyum M'Coy, 1851 (original description)
Talonella Gray, 1851 accepted as Pholadidea Turton, 1819 (original description)
Taphrocampa Gosse, 1851 (original description)
Thalassicolla Huxley, 1851 (original description)