We report the first record of the genus Microcaecilia in Peru from lowland, primary rainforest in Loreto, adding to its previously known geographic range from northwestern Colombia; Ecuador through southern Venezuela to the Guianas and São Paulo, Brazil. Two individuals of a species of this genus of small caecilians were found in deep leaf litter at the Reserva Forestal Santa Cruz, located approximately 30 km northeast of the city of Iquitos. We refer to these specimens as Microcaecilia sp. because of the current difficulty in confidently determining their identity.