• Hymetrochota rotula Topsent, 1904
• Hymetrochota topsenti (Burton, 1930)
• Iotroata abyssi (Carter, 1874)
• Iotroata acanthostylifera (Stephens, 1916)
• Iotroata affinis (Lundbeck, 1905)
• Iotroata oxeata (Lundbeck, 1905)
• Iotroata polydentata (Lundbeck, 1905)
• Iotroata rotula (Topsent, 1904) accepted as Hymetrochota rotula Topsent, 1904
• Iotroata rotulancora (Lundbeck, 1905)
• Iotroata spinosa (Lundbeck, 1905)
• Iotroata topsenti (Burton, 1930) accepted as Hymetrochota topsenti (Burton, 1930)
• Iotroata varidens (Lundbeck, 1905)
• Iotrochota abyssi (Carter, 1874) accepted as Iotroata abyssi (Carter, 1874)
• Iotrochota acanthostylifera Stephens, 1916 accepted as Iotroata acanthostylifera (Stephens, 1916)
• Iotrochota affinis Lundbeck, 1905 accepted as Iotroata affinis (Lundbeck, 1905)
• Iotrochota oxeata Lundbeck, 1905 accepted as Iotroata oxeata (Lundbeck, 1905)
• Iotrochota polydentata Lundbeck, 1905 accepted as Iotroata polydentata (Lundbeck, 1905)
• Iotrochota rotulancora Lundbeck, 1905 accepted as Iotroata rotulancora (Lundbeck, 1905)
• Iotrochota spinosa Lundbeck, 1905 accepted as Iotroata spinosa (Lundbeck, 1905)
• Iotrochota varidens Lundbeck, 1905 accepted as Iotroata varidens (Lundbeck, 1905)