@article {194, title = {A review of the Larainae of Australia with description of seven new species and the new genus Australara (Coleoptera, Byrrhoidea, Elmidae)}, journal = {ZooKeys}, volume = {1073}, year = {2021}, pages = {55{\textendash}117}, abstract = {

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 Sat\ô, 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.

}, keywords = {aquatic beetles, Hydora, new taxa, Ovolara, Potamophilinus, riffle beetles, Stetholus, taxonomy}, doi = {10.3897/zookeys.1073.71843}, author = {C.B. Barr and W.D. Shepard} } @article {193, title = {Zunielmis pax, a new genus and species of riffle beetles (Coleoptera: Elmidae) from Colombia}, journal = {Zoosystematica Rossica}, volume = {30}, year = {2021}, pages = {248{\textendash}265}, abstract = {

A new riffle beetle, Zunielmis pax gen. et sp. nov. , is described from Colombia (Vichada, Puerto Carre\ño, 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.

}, keywords = {Coleoptera, Colombia, Elmidae, Elminae, freshwater sponges, Neotropics, new genus, new species, Orinoco River basin, riffle beetles, taxonomy}, doi = {10.31610/zsr/2021.30.2.248}, author = {M. Gonz{\'a}lez-C{\'o}rdoba and V. Manzo and C.E. Granados-Mart{\'\i}nez} } @article {186, title = {Revision of Macrelmis Motschulsky, 1860 in the Southwestern United States and Northern Mexico with Description of Four New Species (Coleoptera: Elmidae: Elminae)}, journal = {The Coleopterists Bulletin}, volume = {75}, year = {2021}, pages = {93{\textendash}120}, abstract = {

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.

}, keywords = {calcium bicarbonate-rich water, Harley P. Brown, Nearctic, riffle beetles, tufa}, doi = {10.1649/0010-065X-75.1.93}, author = {C.B. Barr} }