Pompilus decedens Smith, 1873:442, ♀. ♀, Para (leg. H. W. Bates). - Fox, 1897Fox, W.J. 1897. Contributions to a knowledge of the Hymenoptera of Brazil, No. 2. - Pompilidae. Proceedings of the Academy of Natural Sciences of Philadelphia 49:229-283. (distribution), 250 (listed); Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 284 (listed); Banks, 1947Banks, N. 1947. Studies of South American Psammocharidae. Part 2. Museum of Comparative Zoology at Harvard College, Bulletin 99:371-486.:381 (listed). - As Batazonus decedens: - Banks, 1944Banks, N. 1944. The Psammocharidae (Hymenoptera) taken at Kartabo and other localities in British Guiana. Zoologica 29:97-112. (distribution), 111 (listed); Banks, 1947Banks, N. 1947. Studies of South American Psammocharidae. Part 2. Museum of Comparative Zoology at Harvard College, Bulletin 99:371-486. (distribution), 381 (listed). - As Poecilopompilus decedens: - Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution); Kurczewski et al., 2020Kurczewski, F.E., R.C. West, C. Waichert, K.C. Kissane, D. Ubick & J.P. Pitts 2020. New and unusual host records for North American and South American spider wasps (Hymenoptera: Pompilidae). Zootaxa 4891 (1):1-112. (distribution), 43 (prey); Fernández et al., 2022Fernández, F., J. Rodriguez, C. Waichert, B. Decker & J. Pitts 2022. Twenty two years later: An updated checklist of Neotropical spider wasps (Hymenoptera: Pompilidae). Zootaxa 5116 (4):451-503. (distribution); Kurczewski et al., 2022Kurczewski, F.E., R.C. West, C. Waichert & J.P. Pitts 2022. Additional new and unusual host records for Western Hemisphere spider wasps (Hymenoptera: Pompilidae). Insecta Mundi 0928:1-32. (distribution, hosts).