Children (20 direct children, 20 direct and indirect children):
Arnioceras speciosum
Arnioceras fieldingiceroides
Arnioceras insolitum
Arnioceras ceratitoides
Arnioceras humboldti
Arnioceras miserabile
Arnioceras semicostatum
Arnioceras robustum
Arnioceras arnouldi
Arnioceras rejectum
Arnioceras paucicostum
Arnioceras nevadanum
Arnioceras bodleyi
Arnioceras concinnum
Arnioceras crassicosta
Arnioceras flavum
Arnioceras hodderi
Arnioceras nigrum
Arnioceras notatum
Arnioceras semicostatoides