FIGURE 4. B. acutus n in Brachyrhynchus n. gen. n. sp., a new genus of Polycystididae Graff, 1905 (Rhabdocoela: Kalyptorhynchia), with the description of three new species from the Mediterranean and the Indian Ocean

FIGURE 4. B. acutus n. sp. (A) Hard parts of the male genital system (from the holotype). B. triplostylis n. sp. (B) Hard parts of the male system (from the holotype). B. oosterlincki n. sp (C) Habitus of a live specimen. (D) Proboscis from a live specimen. (E) Hard parts of the male genital system (from the holotype).