Crematogaster goeldii

This ant was observed visiting the extrafloral nectaries of Tocoyena formosa plants occurring in a southeastern Brazilian cerrado study-site (Sanz-Veiga et al. 2017)

Identification
Longino (2003) - A Crematogaster crinosa-complex species, C. goeldii requires further taxonomic study. This species is part of a set of species that have a deep propodeal suture: The distinctive feature of these forms is a deeply invaginated propodeal suture and an elevated and compressed dorsal face of propodeum. From my cursory examination, Crematogaster goeldii, Crematogaster stigmatica, and Crematogaster unciata were very similar. They were bicolored, with red brown head and mesosoma and contrasting black gaster. The anteroventral petiolar tooth was moderately well developed and the pilosity was much like Crematogaster torosa. The types of Crematogaster chodati were uniform red brown, and the setae on the mesosoma and fourth abdominal tergite were longer and less flattened. The types of Crematogaster heathi had the coloration of goeldii and the pilosity of chodati. The invaginated propodeal suture is itself a variable character, grading into the condition seen in crinosa and torosa, and so the discussion regarding the forms with striate face applies here as well. Crematogaster goeldii and related forms may be synonyms of other species, multiple distinct species, or one variable species.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina, Bolivia, Brazil.

Nomenclature

 *  goeldii. Crematogaster goeldii Forel, 1903c: 255 (w.) BRAZIL. Gallardo, 1931b: 300 (q.). Combination in C. (Orthocrema): Emery, 1922e: 135. Subspecies of torosa: Santschi, 1925d: 229; Santschi, 1929d: 294; Gallardo, 1931b: 300. Revived status as species: Longino, 2003a: 130.

Type Material
Longino (2003) - Crematogaster goeldii. Syntype workers: Brazil, Prov. Rio de Janeiro (Göldi) (examined).

References based on Global Ant Biodiversity Informatics

 * Antoniazzi R., R. N. S. L. Garoo, W. Dattilo, S. P. Ribeiro, and F. S. Neves. 2019. Ant species richness and interactions in canopies of two distinct successional stages in a tropical dry forest. The Science of Nature 106: 20
 * 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.
 * Gallardo A. 1931. Algunas formas sexuales aún no descriptas de las hormigas del género Crematogaster de la República Argentina. Revista de la Sociedad Entomológica Argentina 3: 297-304.
 * Gallardo A. 1934. Las hormigas de la República Argentina. Subfamilia Mirmicinas, segunda sección Eumyrmicinae, tribu Crematogastrini (Forel), género Crematogaster Lund. Anales del Museo Nacional de Historia Natural de Buenos Aires 38: 1-84.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Luederwaldt H. 1918. Notas myrmecologicas. Rev. Mus. Paul. 10: 29-64.
 * Santschi F. 1916. Formicides sudaméricains nouveaux ou peu connus. Physis (Buenos Aires). 2: 365-399.
 * Santschi F. 1929. Nouvelles fourmis de la République Argentine et du Brésil. Anales de la Sociedad Cientifica Argentina. 107: 273-316.