Opisthoscyphus

This genus is not in use as it is currently considered to be a junior synonym of Alfaria.

Nomenclature

 * OPISTHOSCYPHUS [junior synonym of Alfaria]
 * Opisthoscyphus Mann, 1922: 4. Type-species: Opisthoscyphus scabrosus Mann, 1922: 5 (junior synonym of Alfaria minuta Emery, 1896g: 106), by original designation.

Taxonomic history

 * Opisthoscyphus in Ponerinae, Ectatommini: Wheeler, W.M. 1930f: 13; Donisthorpe, 1943f: 678.
 * Opisthoscyphus as genus: Wheeler, W.M. 1930f: 13; Donisthorpe, 1943f: 678.
 * Opisthoscyphus as junior synonym of Gnamptogenys: Brown, 1958g: 212; Kempf, 1972a: 111; Smith, D.R. 1979: 1337; Hölldobler & Wilson, 1990: 10; Bolton, 1995b: 40; Bolton, 2003: 175.
 * Opisthoscyphus as junior synonym of Alfaria: Brown, in Borgmeier, 1957: 115; Camacho, Franco, Branstetter, et al. 2022: 10.