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Key to genera of Solenopsidini with 11 antennal segments
Key to genera of Solenopsidini based on workers with 11 antennal segments.
This key was developed by Chung et al. (2025), with reference to Bolton (1987) and Cover & Deyrup (2007) for Solenopsidini workers with 11-segmened antennae. Tyrannomyrmex and Tropidomyrmex are newly added in the key following their revivals by Ward & al. (2015). Similarly, the following genera were excluded according to Ward & al. (2015): Tranopelta and Allomerus were moved to Attini; Diplomorium was moved to Crematogastrini, and Phacota is now a junior synonym of Monomorium.
1
2
return to couplet #1
- Propodeum in profile sharply angulate with propodeal spine (Fig. 7A) => 3
- Propodeum in profile round without propodeal spine (Fig. 7AA) => 4
Chung et al. (2025), Fig. 7: Identification key of workers, couplet 2. A, mesosoma in lateral view of Oxyepoecus reticulatus, illustration redrawn from the original publication (Kempf, 1974); AA, mesosoma in lateral view of Monomorium ergatogyna, illustration drawn from the image (CASENT0005781) of AntWeb (2023).
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3
return to couplet #2
- Head and mesosoma covered with round foveolae (Fig. 8A). Mandible triangular with two apical teeth (Fig. 8B). Anterior portion of clypeus smooth and without denticle (Fig. 8C) => Tyrannomyrmex (Indomalaya)
- Head and mesosoma shiny to irregularly reticulate sculpture (Fig. 8AA). Mandible subtriangular with four teeth (Fig. 8BB). Anterior portion of clypeus with two large and two small lateral denticles (Fig. 8CC) => Oxyepoecus (Neotropical)
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4
return to couplet #2
- Head round, posterior margin weakly concave (Fig. 9A). Anterior portion of clypeus strongly or weakly bicarinated (Fig. 9B). Antennae with a conspicuous three-segmented club. (Fig. 9C) => Monomorium
- Head subquadrate, posterior margin strongly concave medially (Fig. 9AA). Anterior portion of clypeus broad and convex, not bicarinate (Fig. 9BB). Antennal segments gradually increasing in size without a noticeable club. (Fig. 9CC) => Tropidomyrmex (Neotropical)
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5
return to couplet #1
- Median clypeal seta absent (Fig. 10A). Palp formula 3,2 (Fig. 10B) => Dolopomyrmex (Nearctic)
- Median clypeal seta present (Fig. 10AA). Palp formula 2,2 (Fig. 10BB) => 6
Chung et al. (2025), Fig. 10: Identification key of workers, couplet 5. A, head of Dolopomyrmex pilatus, illustration drawn from the image (CASENT0178567) of AntWeb (2023); B, maxilla and labium of Dolopomyrmex, illustration drawn according to original description; AA, head of Bondroitia sp., illustration drawn from the image (CASENT0104322) of AntWeb (2023); BB, maxilla and labium of Bondroitia, illustration drawn according to the description of Bolton (1987). Abbreviations: Lip labial palp; Mxp maxillary palp.
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6
return to couplet #5
- Propodeal spiracle on the center of propodeum (Fig. 11A). Petiolar peduncle shorter than node (Fig. 11B) => Unicumyrmex (Indomalaya)
- Propodeal spiracle on the posterior portion of propodeum (Fig. 11AA). Petiolar peduncle longer than node (Fig. 11BB) => Bondroitia (Afrotropical)
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