Taxonomy and nomenclature of Aspidosperma (Apocynaceae) Author Castello, Ana Carolina Devides 0000-0002-8730-8264 Departamento de Ciências Agrárias e Naturais, Universidade do Estado de Minas Gerais, CEP 38302 - 192, Ituiutaba, MG, Brazil ana. castello @ uemg. br; https: // orcid. org / 0000 - 0002 - 8730 - 8264 & Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Rua Monteiro Lobato 255, CEP 13083 - 862, Cidade Universitaìria Zeferino Vaz, Campinas, SP, Brazil ana.castello@uemg.br Author Pereira, Andreza Stephanie De Souza Pós-graduação em Biologia Vegetal, Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas & Pós-graduação em Biodiversidade, Instituto de Ciências e Tecnologia das Águas, Unidade Tapajós, Universidade Federal do Oeste do Pará - UFOPA, Rua Vera Paz s. n., CEP 68040 - 255, Santarém, PA, Brazil Author Shimizu, Gustavo Hiroaki Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Rua Monteiro Lobato 255, CEP 13083 - 862, Cidade Universitaìria Zeferino Vaz, Campinas, SP, Brazil Author Zuntini, Alexandre Rizzo Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Rua Monteiro Lobato 255, CEP 13083 - 862, Cidade Universitaìria Zeferino Vaz, Campinas, SP, Brazil & Royal Botanic Gardens - Kew, Kew Green, Richmond, Surrey, TW 9 3 AE, U. K. Author Simões, André Olmos Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Rua Monteiro Lobato 255, CEP 13083 - 862, Cidade Universitaìria Zeferino Vaz, Campinas, SP, Brazil Author Koch, Ingrid Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Rua Monteiro Lobato 255, CEP 13083 - 862, Cidade Universitaìria Zeferino Vaz, Campinas, SP, Brazil text Phytotaxa 2022 2022-11-04 571 3 239 277 http://dx.doi.org/10.11646/phytotaxa.571.3.1 journal article 10.11646/phytotaxa.571.3.1 2f0bde50-8a71-4f78-85a9-3a3b477c2590 1179-3163 7284667 Aspidosperma leucocymosum Kuhlm. in Arch. Inst. Biol. Veg. 2(1): 88. 1935 . ≡ Aspidosperma leucostachys Kuhlm. ex Markgr. in Notizbl. Bot. Gart. Berlin-Dahlem 12(115): 558. 1935, nom. illeg. superfl. Holotype :— BRAZIL . Amazonas : Rio Curicuriari , afluente do Rio Negro , margem alta, 21 Dec 1931 , A. Ducke s.n. [ A. Ducke [24492]] ( RB (mounted on two herbarium sheets) [barcode 00535000!, barcode 00535049!]; isotypes: F [fragment] [barcode V0092465F image!], G (mounted on two herbarium sheets) [barcode G00190818 image!], IAN [No. 50584!], K [barcode K000587695 image!], MO [barcode MO-1845735 image!], P [barcode P00645102 image!], S [No. S04-1769 image!], U [barcode U0000477 image!], US [barcode 00111803 image!]) . Notes —Since A . leucocymosum and A . leucostachys share the same type , the oldest name has priority. Therefore, A . leucocymosum takes precedence since it was published in September 1935 ( Kuhlmann 1935 ), while A . leucostachys was published in December 1935 ( Markgraf 1935a ) (ICN article 11.4; Turland et al. 2018 ). Also, Kuhlmann (1935) indicated the gathering Ducke s.n. from the herbarium RB (RB No. 24492, as “24472” in Woodson (1951)) in the prologue of A . leucocymosum . Based on this information and the materials analyzed, we consider that the two herbarium sheets with this information in RB (RB barcodes 00535000 and 00535049) belong to a single specimen mounted on two sheets as they possess a single original label in common, received the same voucher number, and are physically kept together (ICN article 8.3, Ex. 9; Turland et al. 2018 ). Lastly, it is worth mentioning that the collection date indicated by Kuhlmann (1935) in the prologue of A . leucocymosum is probably incorrect (“ 21- III-1934 ”), as the date “ 21 December 1931 ” appears in the holotype and isotypes.