Anthidium multiplicatum Smith, 1879:87, Parizotto & Melo, 2020Parizotto, D.R. & G.A.R. Melo 2020. Revision of the rare anthidiine bee genus Rhynostelis Moure & Urban (Hymenoptera, Apidae). Revista Brasileira de Entomologia 64 (2):1-7.:6, Holotype ♀ (Natural History Museum, London, England); Parizotto & Melo, 2020Parizotto, D.R. & G.A.R. Melo 2020. Revision of the rare anthidiine bee genus Rhynostelis Moure & Urban (Hymenoptera, Apidae). Revista Brasileira de Entomologia 64 (2):1-7.:5, Holotype ♀, Amer. cent., Chiriqui (Hungarian Natural History Museum). - As Rhynostelis multiplicata: - Moure & Urban, 1994Moure, J.S. & D. Urban 1994. Rhynostelis, gen. n. e notas sobre Hoplostelis Dominique (Hymenoptera, Apoidea, Megachilidae). Revista Brasileira de Zoologia 11 (2):297-302.:298 (comb. nov.). - As Rhynostelis multiplicatum: - Parizotto & Melo, 2020Parizotto, D.R. & G.A.R. Melo 2020. Revision of the rare anthidiine bee genus Rhynostelis Moure & Urban (Hymenoptera, Apidae). Revista Brasileira de Entomologia 64 (2):1-7. (distribution).
Rhynostelis xavieri Mahlmann, 2020:2, Parizotto & Melo, 2020Parizotto, D.R. & G.A.R. Melo 2020. Revision of the rare anthidiine bee genus Rhynostelis Moure & Urban (Hymenoptera, Apidae). Revista Brasileira de Entomologia 64 (2):1-7.:6, Holotype ♀ (Coleção de Invertebrados do Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil). Synonymized with Rhynostelis multiplicatum (Smith, 1879) by Parizotto & Melo, 2020Parizotto, D.R. & G.A.R. Melo 2020. Revision of the rare anthidiine bee genus Rhynostelis Moure & Urban (Hymenoptera, Apidae). Revista Brasileira de Entomologia 64 (2):1-7.:6.