@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 {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 {59, title = {Typhloelmis Barr (Coleoptera: Elmidae: Elminae), a New Stygobiontic Riffle Beetle Genus with Three New Species from Texas, USA}, journal = {The Coleopterists Bulletin}, volume = {69}, year = {2015}, pages = {531-558}, abstract = {

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.

}, keywords = {aquatic beetles, Edwards-Trinity Aquifer, karst spring, larva, stygofauna, taxonomy}, doi = {http://dx.doi.org/10.1649/0010-065X-69.4.531}, url = {http://www.bioone.org/doi/full/10.1649/0010-065X-69.4.531}, author = {C.B. Barr}, editor = {J.R. Gibson and P.H. Diaz} }