Three species of Phoenicagrion are known from the north-eastern Amazonian part of Peru: P. flammeum, P. paulsoni, and a third undescribed species. In 2009 and 2010 several specimens of this third species were collected in Loreto, making it possible to describe this species, here named Phoenicagrion trilobum (holotype ♂: Peru, Loreto department, Tahuayo River, 18 km E…
The placement of Leptagrion flammeum in Aeolagrion is confirmed to be incorrect; comparison with all other described genera of New World Coenagrionidae shows that this species does not belong in any of them. A new genus, Phoenicagrion (type species L. flammeum), is here described to include L. flammeum and a new species, P. paulsoni (holotype…