Two new species of pincer wasps (Hymenoptera: Dryinidae: Gonatopodinae) from blackwater floodplain forest (igapó) in the Brazilian Amazon

ABSTRACT Two new species of pincer wasps (Hymenoptera: Gonatopodinae) are described: Gonatopus jadisi Martins sp. nov. and Pareucamptonyx igapoense Martins sp. nov., collected in blackwater forest (igapó) in Amazonas state, Brazil. The specimens studied come from an ecological survey of invertebrates conducted nearly 50 years ago and taken to the Max Planck Institute in Germany for study by Dr. Adis. In 2008, the samples were repatriated to the National Institute for Amazonian Research (INPA) and deposited in the same institute’s invertebrate collection. Additionally, a specimen of Gonatopus collected in the state of São Paulo was included in this study, forming part of the type-series of Gonatopus jadisi Martins sp. nov. In addition to the descriptions, identification keys, illustrations of the species and distribution maps are presented. These samples represent an unusual finding for a location with already well-known fauna, thus demonstrating the importance of the repatriated collection and its continued contribution to Amazonian biodiversity.