@article {85, title = {Hypsilara royi gen. n. and sp. n. (Coleoptera, Elmidae, Larainae) from Southern Venezuela, with a revised key to Larainae of the Western Hemisphere}, journal = {ZooKeys}, volume = {116}, year = {2011}, pages = {25-36}, abstract = {

Here we describe a new genus, for a new species of riffle beetle, Hypsilara royi gen. n. and sp. n., from the tepui Cerro de la Neblina in southern Venezuela. This new genus can be distinguished from all other laraine genera by its small size (ca. 4.5 mm) and the presence of a shallow, wide, V-shaped groove across the apical third of the pronotum. An updated key to the genera of Western Hemisphere Larainae is provided, along with information on habitat and collection methods for this taxon.

}, keywords = {aquatic insects, Cerro de Neblina, Guiana Shield, Neotropical region, riffle beetle, tepui}, author = {C.A. Maier and P.J. Spangler} } @article {84, title = {Elachistelmis gen. n. (Coleoptera: Elmidae: Elminae) from Suriname, with description of two new species}, journal = {Zootaxa}, volume = {3500}, year = {2012}, pages = {61-69}, abstract = {

Elachistelmis gen. n. is described for two new species of riffle beetle, E. tetramera sp. n., and E. sipaliwiniensis sp. n. from southwestern Suriname. This new genus can be distinguished from all other elmid genera by its small size (ca. 1.0\–1.2 mm), pronotum with sublateral carinae and lacking depressions, and the presence of a narrow band of plastron setae on the lateral edge of each elytron. Elachistelmis tetramera sp. n. is among the smallest recorded Elmini and possesses many characters associated with miniaturization, such as reduced tarsal formula and feathery wings with reduced venation. A key to species, scanning electron micrographs, and illustrations of the male genitalia are provided.

}, keywords = {Aquatic insect, miniaturization, Neotropical region, riffle beetle}, author = {C.A. Maier} }