Similar species: Marumba saishiuana Okamoto, 1924
Marumba spectabilis (Butler, 1875) is more rufous brown than other species of the genus and much more conspicuously coloured than Marumba dyras, Marumba sperchius and Marumba cristata. Forewing upperside with tornal loop strong, and with more weak and irregular bands than in other species
Marumba spectabilis (Butler, 1875) has forewing underside with a large orange-tawny area filling the anal angle. Hindwing underside with a much smaller, rectangular orange-tawny patch on termen close to the anal angle, this running parallel to the wing margin. In Marumba saishiuana these orange-tawny patches are more irregular, of equal size, and heavily infused with brown. See details at https://tpittaway.tripod.com/china/m_spe.htm