Shepard, W. D., & Barr, C. B. (2016).

Neoelmis guarani Shepard & Barr, a sexually dimorphic new species from
Paraguay (Insecta: Coleoptera: Elmidae: Elminae)

. Zootaxa, 4083(3), 418–430. https://doi.org/10.11646/zootaxa.4083.3.6