Abstract
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 of the Amazon River, 4°24′18′′ S, 73°14′38′′ W, in RMNH collection).
http://zoobank.org/urn:lsid:zoobank.org:pub:46C4FF0C-4FBA-40F3-8D34-A6F2FB332B61
Acknowledgements
I thank Rosser Garrison and Natalia von Ellenrieder for sending me the specimen collected by Guillermo G. Klug and for commenting on an earlier version of this article, Frank Stokvis for providing me the data from the barcoding project, Paul Beaver and the staff of Amazonia Expeditions for their support in the fieldwork, Ana Huamantinco, Vincent Kalkman, Klaas-Douwe Dijkstra and Jan van Tol for their support in the planning of the fieldwork and Martha Courbois for her continuous support in every stage of this project both in the Netherlands and in Peru.