Gieysztoria falx Brusa, Damborenea and Noreña 2003

Material and locality. Specimens studied in vivo by squash method. Atalaya on 2­8­01 and La Matilde stream on 5­3­03. Sagittal sections of one specimen deposited in the Invertebrate Zoology Collection of the Museo de La Plata, MLP 5355.

Comments. The morphology of the specimens studied here is similar to the description of specimens studied by Brusa et al. (2003) from Los Talas, Berisso, Buenos Aires, Argentina.