This introduced species occurs throughout Florida, achieving its highest densities in northern areas of the state. It usually occurs in disturbed areas, but seems to thrive in some pine plantations. Nests are under loose bark, or at the bases of pine trees, occasionally arboreal, or under shingles. First reported in the U.S. (Louisiana) in 1978 (Wheeler and Wheeler 1978). Note that the identity of this species and virtually all other Brachymyrmex is problematical and confirmation of the occurrence of this species in the United States needs confirmation. Pest status: occasionally enters open buildings in large numbers. No previous published Florida records; earlier specimens: 1988. (Deyrup, Davis & Cover, 2000.)
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Deyrup, Davis & Cover (2000): This species seems to adapt well to open pine forests (high pine and flatwoods habitats) in north Florida, as well as to the usual open disturbed areas favored by many exotics. Huge nests may be found in the loose bark at the bases of large pine trees, a nesting site also favored by native species of Paratrechina, Pheidole, Solenopsis and Brachymyrmex. The diet of B. musculus is unknown, except that they eagerly feed on honeydew, and are therefore likely to promote the increase of sap sucking insects.
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- musculus. Brachymyrmex tristis r. musculus Forel, 1899c: 124 (w.) COSTA RICA. Forel, 1901c: 135 (q.). Raised to species: Forel, 1901c: 135. See also: Santschi, 1923b: 673.
- Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp. (page 82, catalogue)
- Deyrup, M., Davis, L. & Cover, S. 2000. Exotic ants in Florida. Transactions of the American Entomological Society 126, 293-325.
- Forel, A. 1899h. Formicidae. [part]. Biol. Cent.-Am. Hym. 3: 105-136 (page 124, worker described)
- Forel, A. 1901d. I. Fourmis mexicaines récoltées par M. le professeur W.-M. Wheeler. II. A propos de la classification des fourmis. Ann. Soc. Entomol. Belg. 45: 123-141 (page 135, queen described)
- Forel, A. 1901d. I. Fourmis mexicaines récoltées par M. le professeur W.-M. Wheeler. II. A propos de la classification des fourmis. Ann. Soc. Entomol. Belg. 45: 123-141 (page 135, raised to species)
- Ortiz-Sepulveda, C.M., Van Bocxlaer, B., Meneses, A.D., Fernández, F. 2019. Molecular and morphological recognition of species boundaries in the neglected ant genus Brachymyrmex (Hymenoptera: Formicidae): toward a taxonomic revision. Organisms Diversity & Evolution (DOI 10.1007/s13127-019-00406-2).
- Santschi, F. 1923b. Revue des fourmis du genre Brachymyrmex Mayr. An. Mus. Nac. Hist. Nat. B. Aires 31: 650-678 (page 673, see also)