Wille, A. 1967. A new species of stingless bee <i>Trigona (Plebeia)</i> from Costa Rica, with descriptions of its general behavior and cluster-type nest. Revista de Biología Tropical. 15, 2 (Dec. 1967), 299–313. DOI:https://doi.org/10.15517/rev.biol.trop. v15i2.28471.