Turbellarian taxonomic database
Macrostomum johni Diagnosis
Length up to 1.3 mm. Sensory hairs and rhabdoids all over body. 'Haftpapillen' present. Rhammite tracks ('Stäbchenstrassen') weakly developed. Eyes present. Elongate testes. Very short ductus intervesicularis present. Penis stylet curved in two planes and 80-98 um in length; distal end blunt and cowl (hood) shaped, and the distal opening sub-terminal; proximal opening 25-33 um. Ovaries shorter than testes, compact and only slightly indented. Vagina short. 'Verschlussapparat' poorly developed.
[From Young JO (1972): 258]
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