Abstract
We collected a queen specimen of Discothyrea neotropica Bruch, 1919 in a pitfall trap in Paititi Natural Reserve, southeastern Buenos Aires province, Argentina. The new record represents the southernmost occurrence for this species and extends its habitat preferences to a humid temperate climate. Our record of D. neotropica is the first in Argentina since 1949.
Highlights
The genus Discothyrea Roger, 1863 belongs to the family Formicidae, subfamily Proceratiinae
A queen specimen of D. neotropica was collected in February 2016, in a pitfall trap in Paititi Natural Reserve (37°55ʹ14.47ʺ S, 57°48ʹ46.23ʺ W), which is 20 km west of the city of Mar del Plata, Buenos Aires province, Argentina (Fig. 1)
This is part of the Sierra de Difuntos system, which in turn is part of La Peregrina of the Sierras de Mar del Plata ranges (Guazzelli 1999), is a relict of the pampas grasslands located within the Areas Valiosas de Pastizal (Bilenca and Miñarro 2004)
Summary
The genus Discothyrea Roger, 1863 belongs to the family Formicidae, subfamily Proceratiinae. Species of this genus are distributed across tropical areas of the southern hemisphere. Discothyrea extends from the southeastern United States to northern Argentina (Latke 2003). The genus includes 37 described species of which 2 are extinct (Antweb, de Andrade 1998); 8 species belong to the Neotropical region (SosaCalvo and Longino 2007). Workers are characterized by their diminutive size and single ommatidium. They possess exposed antennae insertions attached to the head in an anterior cephalic ledge jutting above the mandibles
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