01562nas a2200193 4500008004100000245008900041210006900130300001400199490000900213520098400222653002001206653001201226653002201238653001601260653001301276100002001289700001501309856004401324 2021 eng d00aA new minute riffle beetle (Coleoptera: Elmidae: Pagelmis) from the Brazilian Amazon0 anew minute riffle beetle Coleoptera Elmidae Pagelmis from the Br a369–3760 v50613 a

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.

10aaquatic insects10aElminae10aemended diagnosis10aNeotropical10ataxonomy1 aPolizei, T.T.S.1 aHamada, N. uhttps://elmidae.myspecies.info/node/19201395nas a2200205 4500008004100000245011400041210006900155300001400224490000900238520075700247653002001004653001501024653001601039653001901055653001301074100002001087700002001107700001801127856004401145 2020 eng d00aHexacylloepus Hinton, 1940 rises again; 18 new species of a neglected genus (Coleoptera: Byrrhoidea: Elmidae)0 aHexacylloepus Hinton 1940 rises again 18 new species of a neglec a006–0480 v48193 a

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.

10aaquatic beetles10amorphology10aNeotropical10ariffle beetles10ataxonomy1 aPolizei, T.T.S.1 aBarclay, M.V.L.1 aBispo, P.d.C. uhttps://elmidae.myspecies.info/node/16501407nas a2200181 4500008004100000245015900041210006900200300001400269490000900283520077600292653002001068653001601088653001901104653001801123100002001141700002001161856004401181 2019 eng d00aFirst records of the genera Neocylloepus and Pilielmis (Coleoptera: Elmidae: Elminae) from Venezuela, with the description of Pilielmis shepardi sp. nov.0 aFirst records of the genera Neocylloepus and Pilielmis Coleopter a282–2880 v46883 a

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 São Paulo, São Paulo, Brazil (MZSP), Natural History Museum, London, UK (BMNH), Museo del Instituto de Zoología Agrícola, Maracay, Venezuela (MIZA), Michael A. Ivie Collection, Bozeman, Montana, USA (MAIC), and National Museum of Natural History, Smithsonian Institution, Washington DC, USA (USNM).

10aaquatic beetles10aNeotropical10ariffle beetles10aSouth America1 aPolizei, T.T.S.1 aBarclay, M.V.L. uhttps://elmidae.myspecies.info/node/155