Figure 1 from: Casiraghi A, Espadaler X, Pérez Hidalgo N, Gómez K (2020) Two additions to the Iberian myrmecofauna: Crematogaster inermis Mayr, 1862, a newly established, tree-nesting species, and Trichomyrmex mayri (Forel, 1902), an emerging exotic species temporarily nesting in Spain (Hymenoptera, Formicidae). Journal of Hymenoptera Research 78: 57-68. https://doi.org/10.3897/jhr.78.51858

Figure 1 Robinia pseudoacacia tree (black locust) where Crematogaster inermis were nesting (Valencia, Spain). Black arrow indicates the level of nest entrance (Image X. Espadaler).