@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 {192, title = {A new minute riffle beetle (Coleoptera: Elmidae: Pagelmis) from the Brazilian Amazon}, journal = {Zootaxa}, volume = {5061}, year = {2021}, pages = {369{\textendash}376}, abstract = {

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.

}, keywords = {aquatic insects, Elminae, emended diagnosis, Neotropical, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.5061.2.9}, author = {T.T.S. Polizei and N. Hamada} } @article {191, title = {Amazonopsis cerdani (Coleoptera: Elmidae: Elminae), a New Species of Riffle Beetle from French Guiana with Habitat Observations}, journal = {The Coleopterists Bulletin}, volume = {75}, year = {2021}, pages = {427{\textendash}439}, abstract = {

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.

}, keywords = {aquatic beetles, DNA analysis, sexual dimorphism, South America, Streams, taxonomy}, doi = {10.1649/0010-065X-75.2.427}, author = {C.B. Barr and A. Cerdan and S. Clavier and J. Murienne} } @article {188, title = {Disersus otongachi a new species of Larainae riffle beetles from Ecuador (Coleoptera: Elmidae)}, journal = {Zootaxa}, volume = {4963}, year = {2021}, pages = {193{\textendash}199}, abstract = {

We describe here a new species in the genus Disersus Sharp, 1882 from the Otongachi Reserve in Ecuador. Disersus otongachi sp.nov. is externally similar to other representatives of the genus, however, this species can be clearly distinguished for significantly longer antennae and the unique shape of the male genitalia.

}, keywords = {DNA barcoding, Neotropical region, Otongachi Reserve, South America, taxonomy}, doi = {https://doi.org/10.11646/zootaxa.4963.1.12}, author = {F. {\v C}iampor Jr and J. Kodada and J. Boz{\'a}{\v n}ov{\'a} and Z. {\v C}iamporov{\'a}-Za{\v t}ovi{\v c}ov{\'a}} } @article {185, title = {A New, Sexually Dimorphic Species of Cylloepus Erichson from Brazil (Coleoptera: Elmidae)}, journal = {The Coleopterists Bulletin}, volume = {75}, year = {2021}, pages = {270{\textendash}274}, abstract = {

Cylloepus dimorphus Shepard, Sites, and Rodrigues, new species (Elmidae) is described from Brazil with a sexually dimorphic abdominal ventrite 5. Males have a protruding lobe on each side of the apex of ventrite 5. Females lack the lobes and are not distinguishable from congeners.

}, keywords = {Byrrhoidea, Neotropical, riffle beetle, taxonomy}, doi = {10.1649/0010-065X-75.1.270}, author = {W.D. Shepard and R.W. Sites and H.D.D. Rodrigues} } @article {183, title = {A revision of Onychelmis Hinton, 1941 (Coleoptera: Elmidae), with description of new species, DNA barcoding and notes on the geography of the genus}, journal = {European Journal of Taxonomy}, volume = {739}, year = {2021}, pages = {1{\textendash}35}, abstract = {

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 Del\ève, 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.

}, keywords = {Andes, DNA barcoding, Elminae, South America, taxonomy}, doi = {https://doi.org/10.5852/ejt.2021.739.1263}, author = {M. Linsk{\'y} and Z. {\v C}iamporov{\'a}-Za{\v t}ovi{\v c}ov{\'a} and F. {\v C}iampor Jr} }