A–F. Specimens of Gordius sp., ventral view of posterior ends and cuticle in midbody sections. G, H. Gordius aquaticus (V12685), cuticle (G) and posterior end (H). I. Cuticular surface of G. longissimus (V2229). J, K. Cuticle (J) and posterior end (K) of G. paranensis (V5035). Note row of bristles on the posterior end (arrows in K). L. Posterior end of G. paranensis (V11709), arrows as in K.M–O. Cuticle (M, N) and posterior end (O) of G. plicatissimus. The specimen number is indicated in the lower left of each image.