Fig. 1

Schematic drawings and monoclonal antibody staining of specimens of Macrostomum lignano. a Habitus of M. lignano (ventral view); (b) Immunocytochemical staining of cytoplasmic content within the prostate glands with the mAB MPr-1 (the red dot is likely an auto fluorescence artifact); (c) posterior part of the animal with female genitalia (antrum) & male genitalia (comprising stylet, seminal vesicle and prostate gland cells, the latter two which can overlap)