FIGURE 4 in Marine flatworms (Platyhelminthes: Polycladida) found in empty barnacle shells including a new species, from southern Mexican Pacific

FIGURE 4. Stylochus mistus sp. nov. A. (paratype UMAR-PLAT 41), B–G. (holotype UMAR-PLAT 40). A. male and female reproductive system, in frontal histological sections; B–G. male and female reproductive system, in sagittal sections; E. prostatic vesicle of type polyglandular. Structures: fg= female gonopore, gp= glandular epithelium, ma= male atrium, mg= male gonopore, ovi= oviducts, pp= penis papilla, pv= prostatic vesicle, sv= seminal vesicle, u= uterus, va= vagina.