Temnothorax nadigi

In Greece this species is associated with humid habitats such as stream valleys or bushes inside dark deciduous forests (Salata & Borowiec, 2019). Pashaei Rad et al. (2018) found this species in Iran in a Caspian moist littoral area.

Distribution based on Regional Taxon Lists
Palaearctic Region: Andorra, Armenia, Bulgaria, Georgia, Iberian Peninsula, Iran, Iran, Poland, Republic of Macedonia, Spain, Switzerland.

Nomenclature

 *  nadigi. Leptothorax nadigi Kutter, 1925: 409, figs. (w.q.) SWITZERLAND. Espadaler, 1984: 136 (m.). Combination in Temnothorax: Bolton, 2003: 271. Senior synonym of caucasicus: Schulz, in Czechowski, Radchenko & Czechowska, 2002: 55. See also: Stitz, 1939: 178; Kutter, 1977c: 132.
 * caucasicus. Leptothorax caucasicus Arnol'di, 1977a: 198 (w.) GEORGIA. Radchenko, 1995d: 6 (q.m.). Senior synonym of hasardaghi: Radchenko, 1994d: 154 (in key); Radchenko, 1995d: 5. Junior synonym of nadigi: Schulz, in Czechowski, Radchenko & Czechowska, 2002: 55.
 * hasardaghi. Leptothorax hasardaghi Dlussky & Zabelin, 1985: 226, fig. 4 (w.q.) TURKMENIA. Junior synonym of caucasicus: Radchenko, 1994d: 154 (in key).

Taxonomic Notes
Radchenko et al. (2015) established the nadigi species group for this species together with Temnothorax anodonta, Temnothorax anodontoides, Temnothorax iranicus and Temnothorax dlusskyi. Salata & Borowiec (2019) transferred it to the bulgaricus species group without comment on its previous placement or the placement of other species included in the nadigi species group.