• [Misspelled as augustus by Forel, 1912f: 201.]
• Mayr, 1887: 565 (w.m.)
• Combination in Paracryptocerus (Harnedia): Kempf, 1958a: 20.
• Combination in Zacryptocerus: Brandão, 1991: 384.
• Combination in Cephalotes: Baroni Urbani, 1998b: 319.
• Status as species: Mayr, 1863a: 405; Roger, 1863b: 38; Mayr, 1866a: 515 (redescription); Smith, 1867: 525; Mayr, 1887: 565; Emery, 1888c: 362; Dalla Torre, 1893: 141; Emery, 1894d: 203; von Jhering, 1894: 383; Forel, 1895b: 133; Forel, 1908: 354; Wheeler, 1910a: 567; Santschi, 1912e: 529; Forel, 1912f: 201; Bruch, 1915: 530; Luederwaldt, 1918: 40; Emery, 1924f: 309; Borgmeier, 1927c: 117; Borgmeier, 1937b: 244; Kempf, 1958a: 20, 73 (redescription); Kempf, 1972b: 175; Brandão, 1991: 384; Bolton, 1995b: 424; De Andrade & Baroni Urbani, 1999: 700 (redescription); Wild, 2007b: 31; Oliveira et al., 2021: 8 (in list).
• Senior synonym of Cephalotes angustus clarior: Kempf, 1958a: 74; Kempf, 1972b: 175; Brandão, 1991: 384; Bolton, 1995b: 424; De Andrade & Baroni Urbani, 1999: 700; Oliveira et al., 2021: 8 (in list).
• Senior synonym of Cephalotes cristatus ruficeps: De Andrade & Baroni Urbani, 1999: 700; Oliveira et al., 2021: 8 (in list).

Junior synonyms

• Cephalotes angustus clarior (Forel, 1912)
  Obsolete combination(s): Cryptocerus angustus clarior
• Cephalotes cristatus ruficeps (Santschi, 1929)
  Obsolete combination(s): Cryptocerus cristatus ruficeps

Obsolete combinations

• Cryptocerus angustus

Citations

• Baroni Urbani, C. 1998b. The number of castes in ants, where major is smaller than minor and queens wear the shield of the soldiers. Insectes Sociaux 45:315-333.
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Borgmeier, T. 1927c. Catalogo systematico e synonymico das formigas do Brasil. 2 parte. Subf. Pseudomyrminae, Myrmicinae, Formicidae. Archivos do Museu Nacional (Rio de Janeiro) 29:69-164. PDF
• Borgmeier, T. 1937b. Formigas novas ou pouco conhecidas da América do Sul e Central, principalmente do Brasil (Hym. Formicidae). Archivos do Instituto de Biologia Vegetal (Rio de Janeiro) 3:217-255. PDF
• Brandão, C. R. F. 1991. Adendos ao catálogo abreviado das formigas da região Neotropical (Hymenoptera: Formicidae). Revista Brasileira de Entomologia 35:319-412. PDF
• Bruch, C. 1915. Suplemento al catálogo de los formícidos argentinos. I. (Addenda et corrigenda). Revista del Museo de La Plata 19:527-537. PDF
• Dalla Torre, K. W. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. PDF
• De Andrade, M. L.; Baroni Urbani, C. 1999. Diversity and adaptation in the ant genus Cephalotes, past and present. Stuttgarter Beiträge zur Naturkunde. Serie B (Geologie und Paläontologie) 271:1-889. PDF
• Emery, C. 1888c ("1887"). Formiche della provincia di Rio Grande do Sûl nel Brasile, raccolte dal dott. Hermann von Ihering. Bullettino della Società Entomologica Italiana 19:352-366. PDF
• Emery, C. 1894d. Studi sulle formiche della fauna neotropica. VI-XVI. Bullettino della Società Entomologica Italiana 26:137-241. PDF
• Emery, C. 1924f ("1922"). Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C:207-397. PDF
• Forel, A. 1895b. A fauna das formigas do Brazil. Boletim do Museu Paraense de Historia Natural e Ethnographia 1:89-139. PDF
• Forel, A. 1908. Ameisen aus Sao Paulo (Brasilien), Paraguay etc. gesammelt von Prof. Herm. v. Ihering, Dr. Lutz, Dr. Fiebrig, etc. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 58:340-418. PDF
• Forel, A. 1912f. Formicides néotropiques. Part II. 3me sous-famille Myrmicinae Lep. (Attini, Dacetii, Cryptocerini). Mémoires de la Société Entomologique de Belgique 19:179-209. PDF
• Kempf, W. W. 1958a. New studies of the ant tribe Cephalotini (Hym. Formicidae). Studia Entomologica (n.s.)1:1-168.
• Kempf, W. W. 1972b. Catálogo abreviado das formigas da região Neotropical. Studia Entomologica 15:3-344. PDF
• Luederwaldt, H. 1918. Notas myrmecologicas. Revista do Museu Paulista 10:29-64. PDF
• Mayr, G. 1862. Myrmecologische Studien. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 12:649-776. PDF
• Mayr, G. 1863a. Formicidarum index synonymicus. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 13:385-460. PDF
• Mayr, G. 1866a. Myrmecologische Beiträge. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Classe. Abteilung I 53:484-517. PDF
• Mayr, G. 1887. Südamerikanische Formiciden. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 37:511-632. PDF
• Oliveira, A. M.; Powell, S.; Feitosa, R. M. 2021. A taxonomic study of the Brazilian turtle ants (Formicidae: Myrmicinae: Cephalotes). Revista Brasileira de Entomologia 65 (3):52 pp. e20210028. [online early] 10.1590/1806-9665-RBENT-2021-0028 PDF
• Roger, J. 1863b. Verzeichniss der Formiciden-Gattungen und Arten. Berliner Entomologische Zeitschrift 7(Beilage):1-65. PDF
• Santschi, F. 1912e. Quelques fourmis de l'Amérique australe. Revue Suisse de Zoologie 20:519-534. PDF
• Smith, F. 1867. Descriptions of new species of Cryptoceridae. Transactions of the Entomological Society of London (3)5:523-528. PDF
• von Jhering, H. 1894. Die ameisen von Rio Grande do Sul. Berliner Entomologische Zeitschrift 39:321-447. PDF
• Wheeler, W. M. 1910a. Ants: their structure, development and behavior. New York: Columbia University Press, xxv + 663 pp. PDF
• Wild, A. L. 2007b. A catalogue of the ants of Paraguay (Hymenoptera: Formicidae). Zootaxa 1622:1-55. PDF