Definition of morphological characters of the Solenopsis workers measured in this study. Head in dorsal view with measurement lines for CL1, CL2, CW, FRS, ClSpD, ApS, SApS, and SL; frontal region of the head dorsum with measurement lines for FR, FL, ClSpLL, and ClSpLM; dorsal view of mesosoma with measurement lines for ML, PEH, PEL, NOH, and PPH (for definitions, see Table 1).

 
 
  Part of: Csősz S, Seifert B, László M, Yusupov ZM, Herczeg G (2023) Broadly sympatric occurrence of two thief ant species Solenopsis fugax (Latreille, 1798) and S. juliae (Arakelian, 1991) in the East European Pontic-Caspian region (Hymenoptera, Formicidae) is disclosed. ZooKeys 1187: 189-222. https://doi.org/10.3897/zookeys.1187.105866