Nye (1975) stated:-
N. nana is a junior subjective synonym of Sophta concavata Walker,  1862, ibidem 26:1759.
See also Sophta Walker, .
Fletcher (1979) stated:-
This genus was originally proposed in the Geometridae, but has since been transferred to the Noctuidae, where it was placed by Hampson, 1910, Cat. Lepid. Phalaenae Br. Mus. 10: 286.
Poole (1989) included PALURA Walker, 1861; GURIAUNA Walker, 1861; SOPHTA Walker, 1861; AUSINZA Walker, 1864; ZITNA Walker, 1866; NACERASA Walker, 1866; CELEOPSYCHE Butler, 1879; PSEUDEPHYRA Butler, 1886; CALLIPYRIS Meyrick, 1891; AVENTINA Butler, 1892; and TRICHOGATHA Warren, 1913 as junior synonyms of CORGATHA Walker, 1859.
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