Ictelmis, a new riffle beetle genus from Ecuador (Coleoptera: Elmidae).

A new minute riffle beetle genus Ictelmis gen. nov. and the type species Ictelmis martae sp.

Four new species of Sharp from Ecuador (Coleoptera, Elmidae) with DNA barcoding and notes on the distribution of the genus.

The riffle beetle genus Sharp, 1882 is distributed from Mexico to Argentina, forming an important component of the freshwater invertebrate fauna of Latin America. With 21 described species, represents one of the most speciose Larainae genera, but its real diversity is likely much higher. We analysed material from a relatively small area in Ecuador, resulting in the first record of for Ecuador and discovery of four new species and one subspecies: , , , and For delimiting and characterizing species, both morphological and molecular (mtCOI DNA barcodes) data were used.