Hydrobiomorpha iguazu Bachmann 1988

A new species of water beetle, Hydrobiomorpha iguazu, has been described from Iguazú National Park in Argentina. This discovery highlights the unique morphological traits of the species, including its large size (21.0–22.6 mm) and distinctive features such as a subelliptical body shape, a moderately long prosternal keel, and robust meso- and metatarsal claws with conspicuous proximal teeth. The male genitalia exhibit strong sclerotization with a bifurcate apex and elongate accessory appendages, while the female's fifth abdominal ventrite has a large subtriangular glabrous area. The species is further distinguished by its short setigerous furrow on the mesotibiae of males, unlike related species. The study utilized morphological analysis and examination of type specimens to characterize this new taxon, contributing to the biodiversity documentation of UNESCO World Heritage Sites.

Urcola, M. R., Rodriguez, G., Michat, M. C., & Torres, P. L. M. (2026). Hydrobiomorpha iguazu Bachmann 1988. Zenodo. https://doi.org/10.5281/ZENODO.21889616