Key to New World Technomyrmex species

Key based in Fernández & Guerrero (2007)

1

 * Dorsum behind the level of the posterior margin of the eye without setae (head in profile view).....1
 * Dorsum behind the level of the posterior margin of the eye with one or two pairs of setae (head in profile view).....5

2
return to couplet #1
 * Head, mesosoma, petiole, gaster, and leg segments entirely yellow to light brownish yellow; middle and hind coxae may be slightly lighter in shade than the mesosoma; Costa Rica, Panama, and Colombia .....Technomyrmex fulvus
 * Head, mesosoma, petiole and gaster brown to black; colour may be more or less uniform or slightly different on separate tagmata, but never entirely yellow; middle and hind coxae the same colour as the mesosoma to distinctly lighter.....3

3
return to couplet #2
 * Mesonotum, mesopleuron, and most of propodeal dorsum with dense and fine puncturation; propodeal spiracles protruding; SW Colombia .....Technomyrmex gorgona
 * Mesosoma without dense fine puncturation; propodeal spiracles not protruding; tramp species.....4

4
return to couplet #3
 * Scape relatively short and promesonotum relatively short and broad, SI 91 - 102, DTI 110 - 124; eye somewhat smaller, OI 24 - 27; with mesosoma in absolute profile, the mesonotal dorsal outline convex more or less evenly rounded; in same view the junction of the propodeal dorsum and declivity is blunt; tramp species, no New World records but very widespread and occurs in West Palaearctic hothouses .....Technomyrmex albipes
 * Scape relatively long and promesonotum relatively long and narrow, SI 104 - 115, DTI 128 - 141; eye somewhat larger, OI 29 - 32; with mesosoma in absolute profile the mesonotal dorsal outline with a more or less flat anterior section that passes through an obtuse angle to a distinctly more strongly sloped posterior declivity; in same view the junction of the propodeal dorsum and declivity sharply defined; tramp species, California (hothouses), USA .....Technomyrmex vitiensis

5
return to couplet #1
 * Hind leg tarsus distinctly lighter in colour than the tibia; dorsum of head behind level of posterior margin of eye with a single pair of setae, located about two-thirds the way between the level of the posterior margin of the eye and the posterior margin of the head; eyes located somewhat more posteriorly, EPI 72 - 86; tramp species; Florida (outdoors and in houses), Washington (zoo), Puerto Rico, Antigua, Nevis ..... Technomyrmex difficilis
 * Hind leg tarsus of the same colour as the tibia; dorsum of head behind level of posterior margin of eye with two pairs of very short, stubbly setae; first pair located about two-thirds the way between the level of the posterior margin of the eye and the posterior margin of the head; second pair at the posterior margin; eyes located somewhat more anteriorly, EPI 55 – 71; tramp species, no New World records, occurs in West Palaearctic hothouses ..... ''Technomyrmex pallipes..