Key to Temnothorax graecus species-group from Greece

Key to workers of the Temnothorax graecus species-group known from Greece (based on Salata et al., 2023).

1

Petiolar node very low to low and regularly rounded in profile, PEL/PEH ratio 1.53–1.58 (Figs 2, 15). Antennal club always partly brown => 2
Petiolar node usually higher, subangulate in profile, its dorsum convex and acute or straight and sloping posteriorly, PEL/PEH ratio 1.40–1.55 (Figs 5, 6, 9, 12). Antennal club yellow or partly brown => 3

Salata et al. (2023), Figures 1–2. Worker of Temnothorax aeolius. (1) – dorsal, (2) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figures 4–5. Worker of Temnothorax graecus, typical form. (4) – dorsal, (5) – lateral. Scales bar = 0.5 mm.
Salata et al. (2023), Figures 6–7. Worker of Temnothorax graecus. (6) – lateral (pale form), (7) – head. Scale bars = 0.5 mm.
Salata et al. (2023), Figures 8–9. Worker of Temnothorax mytilenes. (8) – dorsal, (9) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figures 11–12. Worker of Temnothorax phaetoni. (11) – dorsal, (12) – lateral. Scale bars = 0.5 mm.

Mesosoma, in lateral view, with dorsum slightly convex; medial frons and vertex predominantly smooth and with sparse and thin rugulae and indistinct costulae; mesosoma laterally with dense rugulae and indistinct costulae and smooth interspaces; dorsally with sparser and thicker rugocostulae (Figs 1–3) => Temnothorax aeolius
Mesosoma, in lateral view, with dorsum straight; medial frons and vertex predominantly smooth and with sparse and thin costulae; pronotum with thick and sparse costulae with smooth interspaces, mesonotum and propodeum with denser and thinner rugocostulae (Figs 14–17) => Temnothorax smyrnensis

Salata et al. (2023), Figures 1–2. Worker of Temnothorax aeolius. (1) – dorsal, (2) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figure 3. Worker of Temnothorax aeolius. Head (scale bar = 0.5 mm).
Salata et al. (2023), Figures 14–15. Worker of Temnothorax smyrnensis (Forel, 1911), typical form. (14) – dorsal, (15) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figures 16–17. Worker of Temnothorax smyrnensis. (16) – lateral (specimen with long propodeal spines), (17) – head. Scale bars = 0.5 mm.

Antennal club partly brown. Petiolar node with convex and acute dorsum (Figs 5, 6) => Temnothorax graecus
Antennal club yellow (Figs 9, 12). Petiolar node with straight and sloping posteriorly dorsum => 4

Salata et al. (2023), Figures 4–5. Worker of Temnothorax graecus, typical form. (4) – dorsal, (5) – lateral. Scales bar = 0.5 mm.
Salata et al. (2023), Figures 6–7. Worker of Temnothorax graecus. (6) – lateral (pale form), (7) – head. Scale bars = 0.5 mm.
Salata et al. (2023), Figures 8–9. Worker of Temnothorax mytilenes. (8) – dorsal, (9) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figures 11–12. Worker of Temnothorax phaetoni. (11) – dorsal, (12) – lateral. Scale bars = 0.5 mm.

Femora yellow; medial frons and vertex shiny and with sparse to dense rugocostulae; propodeal spines short, in form of triangular denticles (Figs 11–13) => Temnothorax phaetoni
Swollen part of femora bright brown to brown; medial frons and vertex with dense and thin costulae and only sometimes the central part of frons with slightly sparser sculpture; propodeal spines moderately long, in form of thin spines (Figs 8–10) => Temnothorax mytilenes

Salata et al. (2023), Figures 11–12. Worker of Temnothorax phaetoni. (11) – dorsal, (12) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figure 13. Worker of Temnothorax phaetoni. Head (scale bar = 0.5 mm).
Salata et al. (2023), Figures 8–9. Worker of Temnothorax mytilenes. (8) – dorsal, (9) – lateral. Scale bars = 0.5 mm.
Salata et al. (2023), Figure 10. Worker of Temnothorax mytilenes. Head (scale bar = 0.5 mm).