01795nas a2200229 4500008004100000245014300041210006900184300001300253490000900266520109200275653002001367653001101387653001301398653001201411653001901423653001901442653001401461653001301475100001501488700001801503856004401521 2021 eng d00aA review of the Larainae of Australia with description of seven new species and the new genus Australara (Coleoptera, Byrrhoidea, Elmidae)0 areview of the Larainae of Australia with description of seven ne a55–1170 v10733 a

The three genera and four species of Larainae (Elmidae) previously described from Australia are reviewed, and one new genus and seven new species are described: Australara glaisteri gen. et sp. nov., Ovolara lawrencei sp. nov., Ovolara monteithi sp. nov., Stetholus carinatus sp. nov., Stetholus longipennis sp. nov., Stetholus metatibialis sp. nov., and Stetholus woronora sp. nov. A lectotype is designated for Hydora laticeps (Carter & Zeck), and the first new collection records of the species are reported since its description in 1932. The occurrence in Australia of Potamophilinus papuanus Satô, described from Papua New Guinea, is reported. A key to the species, photographic images of the external morphology and male genitalia, distribution maps, and habitat and behavioral information, when known, are provided for all twelve species of Australian Larainae.

10aaquatic beetles10aHydora10anew taxa10aOvolara10aPotamophilinus10ariffle beetles10aStetholus10ataxonomy1 aBarr, C.B.1 aShepard, W.D. uhttps://elmidae.myspecies.info/node/19401690nas 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/19301896nas a2200181 4500008004100000245016600041210006900207300001300276490000700289520126300296653003501559653002001594653001301614653001901627653000901646100001501655856004401670 2021 eng d00aRevision of Macrelmis Motschulsky, 1860 in the Southwestern United States and Northern Mexico with Description of Four New Species (Coleoptera: Elmidae: Elminae)0 aRevision of Macrelmis Motschulsky 1860 in the Southwestern Unite a93–1200 v753 a

Four new species of Macrelmis Motschulsky, 1860 are described from the southwestern United States and northern Mexico: Macrelmis harleyi Barr, new species from Arizona, Macrelmis mexicana Barr, new species from Mexico, Macrelmis shepardi Barr, new species from Arizona, New Mexico, Texas, and Mexico, and Macrelmis texangusta Barr, new species from Texas and Mexico. Photographic images illustrate the external morphology and male genitalia of the new species, as well as that of Macrelmis shoemakei (Brown, 1971), Macrelmis moesta (Horn, 1870), and Macrelmis texana (Schaeffer, 1911), which occur in the same geographic region. The genitalia of M. moesta and M. texana are described and illustrated for the first time. A key to the 14 known species of Macrelmis occurring in the southwestern United States and Mexico is provided, accompanied by line illustrations of the genitalia of the remaining seven Mexican species not included in the species treatments. Also included are geographic distribution maps for the seven species that are discussed in this article.

10acalcium bicarbonate-rich water10aHarley P. Brown10aNearctic10ariffle beetles10atufa1 aBarr, C.B. uhttps://elmidae.myspecies.info/node/186