Probolomyrmex, Mayr, 1901

Oliveira, Aline M. & Feitosa, Rodrigo M., 2019, Taxonomic revision of the genus Probolomyrmex Mayr, 1901 (Hymenoptera: Formicidae: Proceratiinae) for the Neotropical Region, Zootaxa 4614 (1), pp. 61-94 : 65-67

Key to the identification of Neotropical workers and queens of Probolomyrmex

1 Prora absent ( Fig. 1A )................................................................................. 2 - Prora present ( Fig. 1B - pr).............................................................................. 3

2 Ventral profile of the petiole with a subrectangular anterior projection. Guatemala, Mexico, and Panama ( Fig. 2A - sp)................................................................................................ P. petiolatus

- Ventral profile of the petiole without a subrectangular anterior projection. Argentina and Brazil (GO, MS, MT, RO, and TO) ( Fig. 2B - sp)................................................................................. P. brujitae

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

- In lateral view, dorsal and posterior margins of propodeum meeting in an acute angle, forming distinct teeth. ( Fig. 3B - pd)..................................................................................................... 4 4 In lateral view petiole higher than long ( Fig. 4A ). In dorsal view petiolar teeth well developed. Brazil (PA, RO and TO) ( Fig. 17C )................................................................................ P. dentinodis sp. n.

- In lateral view petiole longer than high ( Fig. 4B ). In dorsal view petiolar teeth absent or weakly developed ( Fig. 21C )...… 5 5 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 )................................................................................. P. cegua sp. n.

- 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

Figures

FIGURE 1. Lateral view of gaster. A: prora absent. B: prora present. pr = prora.

FIGURE 2. Lateral view of petiole. A: subpetiolar process subrectangular. B: subpetiolar process not subrectangular. sp = subpetiolar process.

FIGURE 3. Lateral view of propodeum. A: propodeum margins rounded. B: propodeum margins angled. pd = propodeum.

FIGURE 4. Lateral view of petiole. A: petiole higher than long. B: periole longer than high.

FIGURE 5. Lateral view of gáster.A: dorsal protuberance in the gaster absent. B: dorsal protuberance in the gaster present. ppd = dorsal protuberance in the posterior region of the first gastral tergite.

FIGURE 17. Probolomyrmex dentinodis sp. n. (paratype worker). A. Habitus. B. head in frontal view. C. dorsal view.

FIGURE 21. Probolomyrmex kelleri sp. n. (worker - DZUP 549771). A. Habitus. B. head in frontal view. C. dorsal view.