Fig. 4. Microstomum rubromaculatum von Graff, 1882. A. Entire body. B in Microstomum (Platyhelminthes, Macrostomorpha, Microstomidae) from the Swedish west coast: two new species and a population description

Fig. 4. Microstomum rubromaculatum von Graff, 1882. A. Entire body. B. Anterior end with focus on glands around mouth. C. Nematocysts. D. Posterior end with focus on reproductive anatomy. E. Male stylet. Abbreviations: a = auricles (ciliary pits); am = antrum masculinum; b = brain; gl = glands; i = intestine; m = mouth; o = ovary; ph = pharynx; s = sperm; st = male stylet; t = testis; vs = vesicula seminalis. Arrowheads indicate orange lipid droplets.