.jpg){kind=logo}
Key to US Brachymyrmex species
Key to workers of Brachymyrmex species known from the United States based on Ortiz-Sepulveda et al. (2019).
1
- Gaster with sparse pubescence, but with scattered, appressed hairs (Fig. 6 g1) => 5
- Gaster with dense appressed or decumbent pubescence (Fig. 6 g2) => 2
2
- Mesonotum bulging dorsally above the pronotum in lateral view (Fig. 6 b1) => Brachymyrmex depilis
- Mesonotum not bulging dorsally above the pronotum in lateral view (Fig. 6 b2) => 3
3
- Body yellowish => Brachymyrmex termitophilus
- Body dark brown => 4
4
- Dorsum of the head and mesosoma with light-colored, dense pubescence; gaster with dense appressed pubescence; eye with on average 11 ommatidia along its maximal diameter, head on average long (head length > 0.5 mm) and wide (head width > 0.4 mm) => Brachymyrmex cordemoyi
- Dorsum of the head and mesosoma with less conspicuous dense pubescence; gaster with dense decumbent pubescence; eye with on average nine ommatidia along its maximal diameter, head on average short (head length < 0.5 mm) and narrow (head width < 0.4 mm) => Brachymyrmex obscurior
5
- Body yellowish, usually with a narrow mesonotum (mesonotum width ~ 0.16) and 8–9 ommatidia along the maximum diameter of the eye => Brachymyrmex aphidicola
- Body brownish or dark brown, usually with a wide mesonotum (mesonotum width ~ 0.20 or more) and 10 or more ommatidia along the maximum diameter of the eye => 6
6
- Scapes surpassing the posterior margin of the head by a length smaller than the maximal diameter of the eye (Fig. 5 d3: A > B); usually with two erect hairs on the pronotum and two on the mesonotum => Brachymyrmex patagonicus
- Scapes surpassing the posterior margin of the head by a length approximately equal to the maximal diameter of the eye (Fig. 5 d3: A ≈ B); usually with more than two erect or decumbent hairs on the pronotum and two erect hairs on the mesonotum => Brachymyrmex bruchi
