Key to Neotropical Probolomyrmex

This key to workers and queens is from: [[Media:Oliveira, A.M., Feitosa, R.M. 2019. Taxonomic revision of the genus Probolomyrmex for the Neotropical region.pdf|Oliveira, A.M., Feitosa, R.M. 2019. Taxonomic revision of the genus Probolomyrmex Mayr, 1901 (Hymenoptera: Formicidae: Proceratiinae) for the Neotropical Region. Zootaxa 4614 (1): 61–94]].

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Probolomyrmex

1

 * Prora absent (Fig. 1A) . . . . . 2


 * Prora present (Fig. 1B - pr) . . . . . 3

2
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 * Ventral profile of the petiole with a subrectangular anterior projection. Guatemala, Mexico, and Panama (Fig. 2A - sp) . . . . . Probolomyrmex petiolatus
 * Ventral profile of the petiole without a subrectangular anterior projection. Argentina and Brazil (GO, MS, MT, RO, and TO) (Fig. 2B - sp) . . . . . Probolomyrmex brujitae

3
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 * In lateral view, dorsal and posterior margins of propodeum meeting in a rounded angle, without any acute projection. Brazil (PA) (Fig. 3A - pd) . . . . . Probolomyrmex lamellatus.


 * In lateral view, dorsal and posterior margins of propodeum meeting in an acute angle, forming distinct teeth. . . . . . 4

4
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 * In lateral view petiole higher than long (Fig. 4A). In dorsal view petiolar teeth well developed. Brazil (PA, RO and TO) . . . . . Probolomyrmex dentinodis.


 * In lateral view petiole longer than high (Fig. 4B). In dorsal view petiolar teeth absent or weakly developed (Fig. 21C) . . . . . 5

5
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 * In lateral view, the highest point of the dorsal profile of the first gastral tergite is at the posterior limit of the tergite. Nicaragua(Fig. 5A) . . . . . Probolomyrmex cegua


 * In lateral view, the highest point of the dorsal profile of the first gastral tergite is anterior to the posterior limit of the tergite. (Fig. 5B - ppd) . . . . . 6

6
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 * Antennal scapes relatively longer, distance from scape apex to posterior margin of head less than or equal to two times the pedicel length. Brazil (AC and RO); Bolivia, Colombia, Costa Rica, Honduras, Panama, and Peru (Fig. 6A) . . . . . Probolomyrmex boliviensis


 * Antennal scapes relatively shorter, distance of scape apex to posterior margin greater than two times the pedicel length (Fig. 6B) . . . . . 7

7
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 * Subpetiolar process well developed, medially concave ventrally to subrectangular, with an acute postero-ventral corner. Guyana, Peru, and Venezuela (Fig. 7A - sp) . . . . . Probolomyrmex kelleri


 * Subpetiolar process weakly developed. Costa Rica (Figs. 7B - sp) . . . . . Probolomyrmex guanacastensis