01774nas a2200229 4500008004100000245013200041210006900173300001400242490000700256520107200263653002001335653001701355653002201372653001801394653001201412653001301424100001501437700001501452700001601467700001701483856004401500 2021 eng d00aAmazonopsis cerdani (Coleoptera: Elmidae: Elminae), a New Species of Riffle Beetle from French Guiana with Habitat Observations0 aAmazonopsis cerdani Coleoptera Elmidae Elminae a New Species of  a427–4390 v753 a

A third species of Amazonopsis Barr, 2018, Amazonopsis cerdani Barr and Cerdan, new species (Coleoptera: Elmidae), is herein described from French Guiana. One female paratype of Amazonopsis theranyi Barr from Peru is tentatively reassigned to A. cerdani as a non-paratype. Photographic images of the male and female habitus, and the male genitalia, are provided, as is a distribution map and a key to the species. Amazonopsis cerdani differs from A. theranyi from Peru and Amazonopsis camachoi Barr from Venezuela by the presence of prominent spines on protarsomeres 1–4 of males, among other characters. The habitat of this species is small, shallow, lowland streams with sandy-silty substrates and low flow. Specimens were collected from unconsolidated leaf litter in depositional areas, and from stick and leaf packs lodged in the current. Genetic analysis conducted on three specimens from two localities, a male and two females, showed that they are conspecific.

10aaquatic beetles10aDNA analysis10asexual dimorphism10aSouth America10aStreams10ataxonomy1 aBarr, C.B.1 aCerdan, A.1 aClavier, S.1 aMurienne, J. uhttps://elmidae.myspecies.info/node/19101896nas 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/18601368nas a2200181 4500008004100000245013700041210006900178300001200247490000700259520075600266653002001022653002201042653001701064653002101081653001301102100001501115856005601130 2011 eng d00aBryelmis Barr (Coleoptera: Elmidae: Elminae), a New Genus of Riffle Beetle with Three New Species from the Pacific Northwest, U.S.A.0 aBryelmis Barr Coleoptera Elmidae Elminae a New Genus of Riffle B a197-2120 v653 a

Bryelmis Barr, a new genus of elmid, and three new species, Bryelmis idahoensis Barr, Bryelmis rivularis Barr, and
Bryelmis siskiyou Barr, are described from streams and springs in Washington, Oregon, California, and Idaho. Drawings or photographs of the adult habitus and male genitalia of each species, and of the larval habitus of the genus, are included, as well as a key to the adults of the species and revised couplets for insertion into existing adult and larval keys to the Elmidae. The biogeography, habitat, and microhabitat of the species are discussed. Aquatic liverworts are the unusual primary microhabitat of all three species of Bryelmis.

10aaquatic beetles10aaquatic liverwort10aChiloscyphus10aglacial refugium10aNearctic1 aBarr, C.B. uhttp://www.bioone.org/doi/full/10.1649/072.065.030101697nas a2200217 4500008004100000245013100041210006900172300001200241490000700253520100700260653002001267653002801287653001701315653001001332653001501342653001301357100001501370700001701385700001501402856006201417 2015 eng d00aTyphloelmis Barr (Coleoptera: Elmidae: Elminae), a New Stygobiontic Riffle Beetle Genus with Three New Species from Texas, USA0 aTyphloelmis Barr Coleoptera Elmidae Elminae a New Stygobiontic R a531-5580 v693 a

The adult and larva of Typhloelmis Barr, a new genus of eyeless, stygobiontic elmid from springs in west-central
Texas, and the adults of three new species, Typhloelmis caroline Barr, Typhloelmis finegan Barr, and Typhloelmis sanfelipe Barr, are described, diagnosed, and illustrated. Taxonomic couplets are provided for the insertion of the new genus intoexisting adult elmid generic keys, and an adult key to the species of Typhloelmis is included. Stygobiontic elmids are reviewed, and the uniqueness of Typhloelmis is discussed. Typhloelmis is the first stygobiontic elmid genus reported from the Nearctic ecozone and is the seventh described worldwide. It is only the second elmid genus known to be anophthalmic (completely eyeless). The Edwards-Trinity Aquifer and the spring habitat in which the genus and species occur are described in detail, and potential threats are discussed.

10aaquatic beetles10aEdwards-Trinity Aquifer10akarst spring10alarva10astygofauna10ataxonomy1 aBarr, C.B.1 aGibson, J.R.1 aDiaz, P.H. uhttp://www.bioone.org/doi/full/10.1649/0010-065X-69.4.531