The Plecoptera of Panama. IV. Description of the last nymphal instar for two species of Anacroneuria Klapálek (Plecoptera: Perlidae) from the Caldera River, Chiriquí, Panamá.

The last nymphal instars of Anacroneuria planicollis Klapálek, 1923 and A. quetzali Gutiérrez-Fonseca and Springer, 2015 are described from the Caldera River, Chiriquí Province, Panamá. The adult female of A. quetzali is associated for the first time and described also from the Caldera River, Chiriquí Province, Panamá.