Key to Neotropical and Nearctic Strumigenys

This worker key is based on: Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028.

Bolton noted in regards to this key: Strumigenys precava and Strumigenys silvestrii are keyed twice as their intercalary dentition varies from a single small denticle to absent.

This key is from a study that included the now synonymized genus Pyramica. Therefore there are two sets of keys that treat two sets of Strumigenys species. The species of the Neotropics were split among three keys: the key found below, a key to the Nearctic Pyramica and a key to the Neotropical Pyramica.

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 * Strumigenys

1

 * Antenna with 4 segments; the first funicular segment followed directly by the 2-segmented club . . . . . 2


 * Antenna with 5 or usually 6 segments; the first funicular segment separated from the 2-segmented club rarely by one, usually by two, much smaller segments . . . . . 3

2
return to couplet #1
 * Ventral surface of petiole with a spongiform strip or curtain. Leading edge of scape with all hairs curved or inclined toward the apex of the scape. Dorsum of head and promesonotum with scale-like to orbicular hairs. Mandible with a spiniform preapical tooth. (Pantropical tramp species) . . . . . Strumigenys emmae


 * Ventral surface of petiole without spongiform tissue. Leading edge of scape with one to several hairs that distinctly curve toward the base of the scape. Dorsum of head and promesonotum with fine simple hairs. Mandible with 2 minute preapical denticles that are extremely small and difficult to see, under low magnifications appearing edentate. (Brazil) . . . . . Strumigenys quadrua