01690nas a2200277 4500008004100000245009700041210006900138300001400207490000700221520089400228653001501122653001301137653001201150653001201162653002301174653001501197653001401212653001601226653002401242653001901266653001301285100002701298700001401325700002901339856004401368 2021 eng d00aZunielmis pax, a new genus and species of riffle beetles (Coleoptera: Elmidae) from Colombia0 aZunielmis pax a new genus and species of riffle beetles Coleopte a248–2650 v303 a

A new riffle beetle, Zunielmis pax gen. et sp. nov. , is described from Colombia (Vichada, Puerto Carreño, Bita River basin). It can be distinguished from all the other elmids by having large areas of a microgranular mesh (plastron) on the pronotum and elytra, crenulate lateral margin of the latter two, the shorter interocular distance than diameter of each eye, as well as by the characters of the structure of mandibles, the shape and sculpture of pronotum, and the structure ofmesosternum,mesotibiae and elytra. The imagoes were collected on freshwater sponges. The habitat, where the new species was found, is described, and the adaptive meaning of the characteristics of plastron are discussed. Drawings and photographs of the adult habitus, distinctive morphological characters, and male and female genitalia are provided.

10aColeoptera10aColombia10aElmidae10aElminae10afreshwater sponges10aNeotropics10anew genus10anew species10aOrinoco River basin10ariffle beetles10ataxonomy1 aGonzález-Córdoba, M.1 aManzo, V.1 aGranados-Martínez, C.E. uhttps://elmidae.myspecies.info/node/19301562nas 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/19201813nas a2200205 4500008004100000245015200041210006900193300001100262490000800273520114300281653001001424653001801434653001201452653001801464653001301482100001601495700003501511700001701546856004401563 2021 eng d00aA revision of Onychelmis Hinton, 1941 (Coleoptera: Elmidae), with description of new species, DNA barcoding and notes on the geography of the genus0 arevision of Onychelmis Hinton 1941 Coleoptera Elmidae with descr a1–350 v7393 a

The genus Onychelmis Hinton, 1941 was for a long time regarded as a small taxon with only three known species distributed in the Andes. A study of new material from Ecuador, using morphological and molecular data, has resulted in the discovery of five new species: Onychelmis lenkae sp. nov., O. lobata sp. nov., O. minor sp. nov., O. onorei sp. nov. and O. splendida sp. nov. We also revised the entire genus and redescribed the three known species, O. longicollis (Sharp, 1882), O. leleupi Delève, 1968 and O. whiteheadi Spangler & Santiago, 1991. Habitus photographs of adults are provided, together with line drawings of male and female genitalia, and schematic illustrations of the distribution of femoral tomentum for each species. DNA sequences for barcoding the COI mtDNA fragment were used to support species delimitation and to suggest possible relationships among species. The revision includes a key to adults of all species of Onychelmis and notes on the biogeography of the genus, with an updated distribution map.

10aAndes10aDNA barcoding10aElminae10aSouth America10ataxonomy1 aLinský, M.1 aČiamporová-Zaťovičová, Z.1 aČiampor, F. uhttps://elmidae.myspecies.info/node/18301597nas a2200193 4500008004100000245010700041210006900148300001000217490000900227520100200236653002001238653002001258653001201278653001301290100001801303700002001321700001901341856004301360 2012 eng d00aTwo new species of Austrolimnius Carter & Zeck (Insecta: Coleoptera: Elmidae) from Southeastern Brazil0 aTwo new species of Austrolimnius Carter Zeck Insecta Coleoptera  a14-240 v33893 a

The genus Austrolimnius Carter & Zeck has its greatest known diversity in Oceania, but its fauna in the Americas is poorly known. In this paper, two new species—Austrolimnius uncatus sp. nov. and A. bocainensis sp. nov.—are described and illustrated based on adult specimens collected at Serra da Bocaina National Park, São José do Barreiro Municipality, São Paulo State, and Nova Friburgo Municipality, Rio de Janeiro State, Brazil. Austrolimnius uncatus sp. nov. is characterized by the long setae on the mesotarsus, the medial expansion of the hind tibiae, and the hook-like shape of the male genitalia. Austrolimnius bocainensis sp. nov. can be recognized by the absence of setae on the mid-tarsus, the cylindrical hind tibiae, and the slightly curved genitalia with few setae. A pictorial key for the Brazilian species of the genus is given. New records of Brazilian species of the genus are reported.

10aaquatic insects10aAtlantic forest10aElminae10ataxonomy1 aMiranda, G.S.1 aSampaio, B.H.L.1 aPassos, M.I.S. uhttps://elmidae.myspecies.info/node/66