Formicidae (Hymenoptera) from the Humid Chaco ecoregion: inventory of species, new records, and pictorial keys for subfamilies and genera identification.

LARREA, DARIO DANIEL; DUFEK MATIAS IGNACIO

Revista del Museo Argentino de Ciencias Naturales, nueva serie

Museo Argentino de Ciencias Naturales

Año: 2023 vol. 25 p. 177 - 198

1514-5158

This is the first study that analyzes the ant fauna of the Humid Chaco ecoregion. We produced an inventory based on a) sampling at different locations in the provinces of Chaco and Corrientes, Argentina, and b) bibliographic records. This inventory comprises 10 subfamilies, 77 genera, and 462 species. Eight of these species are new records for the Humid Chaco ecoregion, and six species are registered for the first time in Argentina. Acanthostichus longinodis Mackay 2004, Camponotus fiebrigi Forel 1906, Crematogaster thalia Forel 1911, Eciton mexicanum argentinum Borgmeier 1955, Mycetomoellerius fiebrigi (Santschi 1916), Strumigenys insolita Bolton 2000 and Strumigenys siagodens (Bolton 2000) are registered as endemic species of the Humid Chaco ecoregion. Pictorial keys are provided for the 10 subfamilies and 77 genera that inhabit this ecoregion.