Skip to main content Skip to main navigation menu Skip to site footer
Published: 2020-07-13

The Neotropical genus Portelmis Sanderson, 1953 (Coleoptera: Elmidae): three new species, new records and updated key

Museu de Zoologia da Universidade de São Paulo (MZSP). Laboratório de Coleoptera (LaC). Av. Nazaré 481, CEP: 04263-000, São Paulo, São Paulo State, Brazil.
2Universidade Federal do Tocantins (UFT), Campus de Porto Nacional, Laboratório de Entomologia - Rua 03, Quadra 17, Lote 11, Jardim do Ipês, Caixa Postal 136, CEP: 77500-000, Porto Nacional, Tocantins, Brazil.
Coleoptera aquatic insects riffle beetles South America taxonomy


Elmidae is one of the most diverse families of aquatic beetles, with more than 1500 species in 151 genera. The Neotropical genus Portelmis formerly comprised five species known from Central and northern South America, divided into two species groups. Three new Brazilian species from the nevermanni group are described and illustrated here: Portelmis vanini sp. nov., Portelmis krolowi sp. nov. and Portelmis fusariae sp. nov. New species records for the North, Central-West and Southeast of Brazil are presented. We also provide first SEM images and an updated key for Portelmis species.



  1. Brown, H.P. (1972) Aquatic dryopoid beetles (Coleoptera) of the United States. Biota of Freshwater ecosystem, identification manual, no 6. U.S. Environmental Protection Agency, Cincinnati, Ohio, 82 pp.

    Fernandes, A.S., Passos, M.I.S. & Hamada, N. (2010) The genus Portelmis Sandersdon, 1935 (Coleoptera: Elmidae: Elminae): first report in Brazil, description of two new Amazonian species and species key for males. Zootaxa, 2517 (1), 33–43.

    Jäch, M.A. & Balke, M. (2008) Global diversity of water beetles (Coleoptera) in freshwater. Hydrobiologia, 595, 419–442.

    Jäch, M.A., Kodada, J., Brojer, M., Shepard, W. & Čiampor Jr., F. (2016) Coleoptera: Elmidae, Protelmidae. World Catalogue of Insects, 14, 1–318 + I–XXI.

    Hinton, H.E. (1936) Descriptions of new genera and species of Dryopidae. Transactions of the Royal Entomological Society of London, 85, 415–435.

    Kodada, J., Jäch, M.A. & Čiampor Jr., F. (2016) 19.2. Elmidae Curtis, 1830. In: Beutel, R.G. & Leschen, R.A.B. (Eds.), Handbook of Zoology, Volume IV (Part 38), Coleoptera, Beetles. Vol. 1. Morphology and Systematics (Archostemata, Adephaga, Myxophaga, Polyphaga partim). 2nd Edition. Walter de Gruyter, Berlin, pp. 561–589.

    Przewoźny, M. & Fernandes, A.S. (2012) Portelmis guianensis sp. nov. from French Guiana (Coleoptera: Elmidae). Zootaxa, 3196 (1), 58–63.

    Sanderson, M.W. (1953) New species and a new genus of New World Elmidae with supplemental keys. The Coleopterists Bulletin, 7, 33–40.

    Short, A.E.Z. (2018) Systematics of aquatic beetles (Coleoptera): current state and future directions. Systematic Entomology, 43 (1), 1–18.

    Spangler, P.J. (1980) A new species of the genus Portelmis from Ecuador (Coleoptera: Elmidae). Proceedings of the Entomological Society of Washington, 82, 63–68.