Revisiting the taxonomy of Dioclea and related genera (Leguminosae, Papilionoideae), with new generic circumscriptions Author Queiroz, Luciano Paganucci de Programa de Pos-Graduacao em Botanica, Universidade Estadual de Feira de Santana, Av. Transnordestina s / n, Novo Horizonte, 44036 - 900, Feira de Santana, BA, Brazil luciano.paganucci@gmail.com Author Snak, Cristiane Programa de Pos-Graduacao em Botanica, Universidade Estadual de Feira de Santana, Av. Transnordestina s / n, Novo Horizonte, 44036 - 900, Feira de Santana, BA, Brazil & Departamento de Engenharia de Pesca e Ciencias Biologicas, Universidade do Estado de Santa Catarina, Rua Cel. Fernandes Martins 270, Progresso, 88790 - 000, Laguna, Santa Catarina, Brazil text PhytoKeys 2020 164 67 114 http://dx.doi.org/10.3897/phytokeys.164.55441 journal article http://dx.doi.org/10.3897/phytokeys.164.55441 1314-2003-164-67 F8BB69882078557CB69041DA4DEAEA61 4.2.9.1. Macropsychanthus scabrus (Rich.) L.P. Queiroz & Snak var. scabrus Dioclea elliptica R.H. Maxwell, Ann. Missouri Bot. Gard. 77(3): 578. 1990, nom. inval. (nom. nud.). Note. Maxwell (1969) proposed the name Dioclea elliptica in his Ph.D. dissertation, using as the type the specimen de la Cruz 3090 from Essequibo, Guyana. That dissertation is not considered an effective publication, however, under ICN Article 30.9 ( Turland et al. 2018 ). It was later published as a synonym of D. scabra by Maxwell (1990) , but with no description, thus being a nomen nudum (ICN Art. 38.1, Turland et al. 2018 ).