Nye (1975) stated:-
Nomenclaturally available, but without included species until Warren, 1913 February 20th, in Seitz, Gross-Schmett. Erde 3: 355. Sypnoides was made available by Hampson, 1915 [January 30th], in a Key to Genera, but it was not until the next volume (Hampson, 1913 [November 19th], ibidem 13: 248) that Hampson gave the full generic description, included three species (Sypna equatoralis Holland, Sypna mandarina Leech, Sypna pannosa Moore), and designated S. pannosa as type-species. In between the publication of Hampson's volumes 12 and 13, Warren used Sypnoides for a single species (S. mandarina) and designated it as type-species. The exact dates of publication of Hampson's catalogue are taken from Collins, 1962, Ann. Mag. nat. Hist. (13) 5: 126. The date of publication of the part of Seitz containing page 335 was stated on page 333 as being 1913 February 20th in both the German and the English editions.
Poole (1989) included SYPNOIDES in the subfamily OPHIDERINAE, treated as CALPINAE by Kitching & Rawlins, in Kristensen (1999).
Poole (1989) included SUPERSYPNOIDES Berio, 1958; EQUATOSYPNA Berio, 1960; and PYSNOIDES Berio, 1960 (as PSYNOIDES Berio, 1960) as junior synonyms of SYPNOIDES Hampson, 1913.
Poole (1989) included 33 species in the genus SYPNOIDES.
Learn more about Noctuidae in Wikipedia
Search the Biodiversity Heritage Library (BHL) for references to SYPNOIDES and included species.