Six new dragonfly larvae of the family Gomphidae in Costa Rica, with a key to the Central American genera (Anisoptera)

Based on material reared in the laboratory, for the first time descriptions and illustrations are presented of the larvae of Phyllogomphoides bifasciatus, Epigomphus subsimilis, E. subobtusus, E. echeverrii, Erpetogomphus constrictor and E. tristani. Erpetogomphus sabaleticus is redescribed. Comments on biology, taxonomic relationships and a key to the Central American genera are provided.