@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 {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} }