@article {192, title = {A new minute riffle beetle (Coleoptera: Elmidae: Pagelmis) from the Brazilian Amazon}, journal = {Zootaxa}, volume = {5061}, year = {2021}, pages = {369{\textendash}376}, abstract = {

The monotypic genus Pagelmis Spangler, 1981 was described from six thousand specimens of Pagelmis amazonica Spangler, 1981 collected with blacklight traps in Ecuador. For many years the known distribution of this genus was restricted to its type-locality, and recently it was recorded in Venezuela, Suriname and Brazil (Roraima State). Now, 40 years after the description of the genus, we describe the second Pagelmis species, based on male and female collected in the Amazon forest (Amazonas State, Brazil).With the description of the second species in the genus we provide an emended diagnosis of Pagelmis. Since adults of this genus were previously collected only in light traps, no habitat information was known. We collected adults of the new species in the first- and second-order streams with black, acidic water and sandy streambeds. The main substrates available in these streams were leaves and roots of riparian vegetation.

}, keywords = {aquatic insects, Elminae, emended diagnosis, Neotropical, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.5061.2.9}, author = {T.T.S. Polizei and N. Hamada} } @article {165, title = {Hexacylloepus Hinton, 1940 rises again; 18 new species of a neglected genus (Coleoptera: Byrrhoidea: Elmidae)}, journal = {Zootaxa}, volume = {4819}, year = {2020}, pages = {006{\textendash}048}, abstract = {

The genus Hexacylloepus extends from the Neotropical region to the southwestern United States of America. At present, 25 species are known from 20 countries, with no new species proposed since 1972. In this paper, we describe and illustrate 18 new species (H. barrae; H. calori; H. casariae; H. froehlichi; H. geiseri; H. grandis; H. iassu; H. keitai; H. maierae; H. manauara; H. metapa; H. phalluspilosus; H. shorti; H. taylorae; H. thoracica; H. tibialis; H. ubirajarai; H. zaninii), from eight countries and give the first records of the genus from Suriname and Guyana.

}, keywords = {aquatic beetles, morphology, Neotropical, riffle beetles, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4819.1.2}, author = {T.T.S. Polizei and M.V.L. Barclay and P.d.C. Bispo} } @article {164, title = {The Neotropical genus Portelmis Sanderson, 1953 (Coleoptera: Elmidae): three new species, new records and updated key}, journal = {Zootaxa}, volume = {4810}, year = {2020}, pages = {452{\textendash}467}, abstract = {

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.

}, keywords = {aquatic insects, riffle beetles, South America, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4810.3.3}, author = {T.T.S. Polizei and A.S. Fernandes} } @article {155, title = {First records of the genera Neocylloepus and Pilielmis (Coleoptera: Elmidae: Elminae) from Venezuela, with the description of Pilielmis shepardi sp. nov.}, journal = {Zootaxa}, volume = {4688}, year = {2019}, pages = {282{\textendash}288}, abstract = {

Neocylloepus Brown, 1970 and Pilielmis Hinton, 1971 are Neotropical genera of riffle beetles, mainly distributed in Central America and the north of South America. These genera are here reported for the first time from Venezuela, and a new species, Pilielmis shepardi sp. nov. is described and illustrated. The type material is housed in Museu de Zoologia da Universidade de S\ão Paulo, S\ão Paulo, Brazil (MZSP), Natural History Museum, London, UK (BMNH), Museo del Instituto de Zoolog\ía Agr\ícola, Maracay, Venezuela (MIZA), Michael A. Ivie Collection, Bozeman, Montana, USA (MAIC), and National Museum of Natural History, Smithsonian Institution, Washington DC, USA (USNM).

}, keywords = {aquatic beetles, Neotropical, riffle beetles, South America}, doi = {https://doi.org/10.11646/zootaxa.4688.2.8}, author = {T.T.S. Polizei and M.V.L. Barclay} } @article {153, title = {The genus Cylloepus Erichson, 1847 (Coleoptera: Elmidae: Elminae) new species and combinations}, journal = {Zootaxa}, volume = {4652}, year = {2019}, pages = {93{\textendash}100}, abstract = {

Elmidae is one of the most diverse families of aquatic beetles, with more than 1500 species in 148 genera. Cylloepus is the genus with the most species in Americas, with 52 species and 2 subspecies currently known. The genus is easily recognised by external morphology; body elongate, pronotum with a longitudinal impression on the disc and elytra striate and punctate. In this paper, based on the study of several international reference collections, we propose two new combinations, and describe two new species of Cylloepus (C. bispoi sp. nov. and C. segurae sp. nov.) from Ecuador and Bolivia.

}, keywords = {aquatic beetles, Neotropical region, riffle beetles, South America, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4652.1.3}, author = {T.T.S. Polizei and M.V.L. Barclay} }