(Translated from French) Has a significantly bi-segmented body, a cephalic end without pseudo-suckers, an elliptical or circular adhesive disc, whose longitudinal diameter reaches 4/7, 1/2, 1/3, 1/4, 1/5, 1/6 or 1/7 of the length of the anterior segment; the posterior segment is rarely inserted at the opposite end of the dorsal surface of the previous, but most often in direct continuation and separated by a more or less marked transverse constriction; ovary median, sub-median or lateral, anterior and tangent to the first testis symmetrically or asymmetrically developed; a second testis oriented transversely bi-lobed, excavated ventrally, often notched posteriorly; copulatory bursa opens by a sub-terminal pore of highly variable size, this organ has a very reduced sinus or, on the contrary, a large cavity may occupy the last third or even the last two fifths of the posterior segment and do not exceed the depth may exceed half the dorso-ventral diameter of the body at this level.
