Se redescribe e ilustra a Colpotrochia flava (Brèhtes) en base al análisis de un sintipo de Paraguay, previamente considerado perdido. Se proveen nuevos datos de distribución y se designa lectotipo para Sychnoleteroides flavus Brèthes.
Colpotrochia flava (Brèthes) is redescribed and illustrated based on the study of one syntype from Paraguay previously presumed lost. New distributional records from Argentina are provided and lectotype is designated for Sychnoleteroides flavus Brèthes.