Figure 1.

Morphology of the first six body regions of a L. ruber specimen photographed between slide and cover glass. Regions: 1, the antecerebral end is made up of the anterior ocellar region (o.e., oculated end), which bears a few well-anchored eyes (e.) on each side, and the postocellar region (blind component, b.c.) without eyes; 2, the cerebral ganglia region (c.g.); 3, the sensory cerebral organs region (c.o.); 4, the postcerebral, preesophageal connective tissue’s region (absent in this species); 5, the anterior esophagus region, characterized by the presence of the mouth (m.); and 6, the posterior esophagus region, where nephridia are located. (Scale bar: 300 μm.)